CN100385939C - Digital Broadcasting and Receiving Devices - Google Patents

Abstract

A broadcasting device which broadcasts a multiplexed stream in which a plurality of contents constituting a dialogue program are multiplexed, and a directory contains a plurality of control information indicating a link with another or a plurality of contents; the control information and In the multiplexed stream, identification information is multiplexed together with a version number, the identification information indicates a common stream ID among the plurality of control information, and a parameter indicating individual control information among the control information, the The version number is the version number of the valid time zone corresponding to the control information.

Description

Digital Broadcasting and Receiving Devices

This application is a divisional application of a patent application with application number 03122908.5 and a filing date of August 30, 1997. The prior application number of the parent case is JP96-230015, and the prior application date is August 30, 1996.

technical field

The present invention relates to a digital broadcasting system and a receiving device.

Background technique

Satellite digital broadcasting has recently started to provide multiple programs using multiple channels. Multiple channels of satellite digital broadcasting are realized by multiplexing multiple channels in one frequency band. This multiplexing uses a technique called a variable converter (transporter) of the MPEG2 (Moving Picture Experts Group 2) standard. Specifically, it is described in the ISO/EC standard 13818-1 (MPEG2 system) specification.

However, this satellite digital broadcasting only unidirectionally transmits image information and the like from the transmitting station, and does not perform interactive processing with the receiving terminal. If the receiving terminal user can select its image information in a dialogic manner according to the transmitted image information catalog, he can enjoy rich programs.

Contents of the invention

The object of the present invention is to provide a digital broadcasting device, a receiving device thereof, and a program recording medium suitable for the digital broadcasting system and the receiving device, which communicate image information using unidirectionally transmitted image information, etc., as in a two-way dialogue.

The digital broadcasting device that achieves the above-mentioned purpose broadcasts a dialogue program composed of a plurality of catalogs (contents of information) connected to each other, and is characterized in that the following parts are provided: a catalog storage unit stores a plurality of catalogs, and the catalog includes activities Image data and control information representing other directories that become its directory connection terminal (リンク first); the transmitting unit performs multiple repetition of a moving image data and the control information contained in the same directory as the moving image data, and transmits the control information Each moving picture data of information multiplex.

Wherein the directory storage unit may also be equipped with the following parts: a first storage unit for storing moving image data included in the plurality of directories; a second storage unit for storing control information included in the plurality of directories; The table storage unit stores a structure table indicating a correspondence relationship between the moving image data stored in the first storage unit and the control information stored in the second storage unit.

Wherein the transmitting unit may also be equipped with the following parts: a multiplexing unit, which reads out a plurality of moving image data stored in the first storage unit and a plurality of control information stored in the second storage unit as digital data streams respectively, Generate those multiplexed multiplexed streams; the multiplexed control unit refers to the structure table, and controls the readout of the multiplexed unit so that the multiplexed data of a plurality of moving images is simultaneously repeated for multiplexed correspondence. Control information for each moving image data; the output unit transmits the multiplexed stream generated in the multiplexer unit on digital broadcast waves.

Wherein the directory storage unit is further provided with a third storage unit storing audio data corresponding to each moving image data;

The structure table storage unit stores correspondence between audio data, moving image data, and control information contained in each directory;

The multiplexing unit may be configured to multiplex the audio data in the third storage unit in the multiplexed stream.

According to the above configuration, since the control information is repeatedly multiplexed in the reproduction time domain of the moving picture data and the moving picture data is transmitted simultaneously, playback can be performed while interactively switching the content in the receiving device according to the user's operation. That is, the present digital broadcasting apparatus can provide interactive programs by one-way broadcasting.

Wherein the directory includes a plurality of control information;

The control information includes connection information representing the list of connection terminals, and time information representing what kind of time interval is valid in the playback time domain of the moving image data corresponding to the relevant control information;

A plurality of control information contained in one directory has link information and time information corresponding to the corresponding moving picture data directory;

The multiplexing control unit may control the multiplexing unit so that the control information is repeatedly multiplexed in the moving image data during the effective time interval,

According to this configuration, the digital broadcasting apparatus multiplexes different control information for each arbitrary time interval within the video data playback time domain, so that the connection destination list and its number can be dynamically changed according to the video data list. Each directory may have an appropriate linker directory corresponding to its directory at each moving picture scene.

The multiplexing control unit may control the multiplexing unit so that the control information is repeatedly multiplexed in the moving image data before a certain time period from the effective time interval.

According to this configuration, since the control information is repeatedly multiplexed in the moving image data from a certain time before the effective time interval, when the receiving device reproduces the content, it is possible to newly receive control information with a different effective time interval from the current control information. In this case, there is a margin to process the new control information of the receiving device.

Wherein the multi-channel control unit is further configured to add a plan number according to the effective time interval to a plurality of control information included in the directory.

According to this configuration, the receiving device can obtain new control information with a different effective time with respect to the content currently being reproduced, using the plan number as a clue.

The configuration of each control information stored in the second storage unit may include connection information representing a list of connection terminals and an auxiliary image representing menu items of each connection terminal.

According to this configuration, menu items that prompt the user of the receiving device to operate can be arbitrarily set in each piece of control information.

The configuration of at least one of the control information may also include a plurality of additional information, representing text or graphic images superimposed on the moving image data; and original information, reflecting which additional information is valid for the user operation of the receiving device.

According to this configuration, the original information and a plurality of additional information are kept in the control information, whereby the additional information can be interactively switched and displayed on the receiving device. For example, a moving image displays a weather forecast, and when the additional information is a plurality of supplementary explanations (text or graphics) related to the moving image list, switching of supplementary explanations is performed according to the user's operation using the original information. As such, a set of moving image data and control information can substantially represent a plurality of directories.

Here, at least one of the control information, its main composition may also include at least two positions containing the connection information and the position of the auxiliary image; initial information; and the original information reflecting the effective position changed by the user operation of the receiving device.

According to this configuration, the plurality of positions that can be switched by the original information are held in the control information, thereby substantially increasing the number of connection terminal lists.

Wherein, the position may also constitute additional information including text or graphic images superimposed on the moving image data.

According to this configuration, since additional information is provided at the above-mentioned position, a plurality of lists can be represented substantially by a set of moving image data and control information, and different connection end lists can be set according to the additional information.

Achieving the above-mentioned object digital broadcasting device, broadcasting is made up of a plurality of mutually connected dialogue programs, it is characterized in that following parts are prepared: image storage unit, stores a plurality of moving image data and a plurality of still image data; Control information storage unit, As a directory element based on each moving image and still image, store a plurality of first and second type information including connection information indicating a connection end directory through the directory; the structure table storage unit is stored in each directory, indicating A first structure table of the corresponding relationship between moving image data and the first type of control information, and a second structure table representing the corresponding relationship between the still image data and the second type of control information; the first multiplexing unit generates such a first multiplexed Streaming, multiplexing the moving image data displayed in the first structure table, and simultaneously repeating the first type of control information corresponding to the moving image data through the playback time of the moving image data; the second multiplexing The demultiplexing section generates such a second multiplexed stream, and repeats the multiplexing of a plurality of still images displayed in the second structure table together with the second type control information; The partially generated first and second multiplexed streams are sent out on digital broadcast waves.

According to this configuration, it is possible to broadcast a talk program including two types of content, that is, a content mainly containing moving images and a content mainly containing still images. The first and second types of control information can be used as the list of the connection end regardless of the list, so the receiving device can switch between the two lists according to the user's operation and play back at the same time, and can broadcast attractive dialogue programs. .

A digital broadcast receiving device for achieving the above-mentioned purpose, which receives dialogue programs composed of multiple directories connected to each other, is characterized in that:

The broadcast wave includes a multiplexed stream in which control information indicating links to other directories is repeatedly multiplexed among different pluralities of video data;

The receiving device is provided with: an extracting unit for extracting one moving picture data and control information in the same directory as the moving picture from the broadcast wave; a holding unit for keeping the extracted control information; a reproducing unit for reproducing the extracted moving picture The data output image signal; the operation unit receives user operation instructing directory switching; the control unit controls the extraction unit according to the user operation, and extracts other directories displayed in the control information held by the storage unit.

According to this configuration, the receiving device uses the one-way broadcast image information, and since the two-way reception of the image information is performed as if interactively, the user can enjoy an interactive broadcast program. In addition, since the control information is repeatedly transmitted, the holding unit not only holds one directory of control information, but also preferably has a small storage capacity.

Wherein, first identification information and second identification information are respectively provided for the moving image data and the control information;

The control information includes first and second identification information representing the directory of the connection terminal;

The extracting unit includes the following parts: a first distinguishing unit distinguishing first identification information given to moving image data in the broadcast wave; a second distinguishing unit distinguishing first identification information given to control information in the broadcast wave; 2. Identification information: the input unit, when the identification results of the first and second identification units are specific identification information instructed by the control unit, the moving image data and control information are imported;

The reproduction unit reproduces the moving image data acquired by the acquisition unit, and the storage unit may be configured to hold the control information acquired by the acquisition unit.

According to this configuration, the receiving device can efficiently receive only the content data to be reproduced since the receiving device discriminates and takes in the moving picture data and the control information.

Wherein, the multiplexed stream multiplexes the incoming information indicating the first and second identification information of the content to be played back initially;

The control unit instructs the extraction unit to enter information extraction once the user accepts the selection operation of the multi-channel stream in the operation unit;

The extractor also has:

an entry information extraction unit, accepting an instruction from the control unit, and extracting entry information from the multi-channel stream;

The entry information storage part stores the entry information extracted by the entry information extraction part;

The control unit may be configured such that the first and second identification information included in the entry information are instructed to the import unit as the specific identification.

According to this configuration, the receiving device extracts the content to be reproduced first based on the entry information, and can reliably reproduce important content such as the main menu.

Wherein the connection information includes an identifier representing the moving image data of the connection terminal directory and a control information identifier;

The first and second identification information are digital data stream IDs respectively representing moving image data and control information in the multi-channel stream;

multiplexing a table representing the correspondence between the moving image data identifier and the first identification information, and the correspondence between the control information identifier and the second identification information, and multiplexing and repeatedly transmitting to the multiplexed stream;

The control unit extracts the correspondence table, and the moving picture data extraction control unit is configured to refer to the correspondence table, convert the moving picture data identifier included in the connection information into the first identification information, and convert the identification information of the control information into the first identification information. The symbol is converted into the second identification information, which is instructed to the extraction unit.

According to this structure, since the talk program of the present invention is transmitted by digital satellite broadcasting conforming to the MPEG2 standard, the existing digital satellite broadcasting tuner can be improved, so that the receiving device of the present invention can be easily implemented.

Wherein the control information includes: connection information representing a list of connection terminals, and an auxiliary image containing menu item images of each connection terminal;

The playback section includes: a moving image data playback section that plays back the moving image data taken in by the take-in section, and an image playback section that plays back the auxiliary image held in the holding section to overlap the moving image data. on the image data;

The operation section accepts user selection of a menu item image;

The control unit may be configured so as to distinguish the first identification information and the second identification information of the connection terminal list based on the menu item and the connection information selected by the user.

According to this configuration, since menu item images are displayed on the receiving device, interactive operations by the user are facilitated, and attractive programs can be produced.

The control information also includes additional information representing text images or graphic images;

The reproducing unit may be configured such that a character image or a graphic image indicated by the additional information held in the holding unit is reproduced so as to be superimposed on the moving image data.

According to this configuration, since additional images such as characters and figures are displayed on top of moving image data in the receiving device, attractive programs can also be produced.

Wherein the control information includes valid time information whose control information indicates a valid period;

The one directory corresponds to a plurality of control information with different valid times;

The playback unit may be configured such that the auxiliary image held in the holding unit is played back during its effective period.

According to this configuration, since control information different in arbitrary time zones within the playback time of moving picture data is multiplexed, the connection terminal list and its number can be dynamically changed according to the moving picture list. Each list can be listed according to the appropriate connection terminal of its list for each moving picture scene. As a result, the user of the receiving device can enjoy a more attractive dialogue program because the connection port changes according to the moving picture scene.

wherein the plurality of control information corresponding to the one directory has a scheme (バ-ヅヨン) number according to the validity period;

The control unit may be configured to control the acquisition unit to acquire control information having a next plan number when one piece of control information is acquired by the acquisition unit.

According to this configuration, the receiving device can sequentially obtain the next control information with a different effective time with respect to the content currently being reproduced, using the plan number as a clue.

Wherein at least one of the control information includes: a plurality of additional information, representing text or graphic images superimposed on the moving image data, and script information, reflecting the user operation of the receiving device to make certain additional information effective;

The control unit determines valid additional information by interpreting and executing the script held in the holding unit;

The playback unit may also be configured to play back text or graphic images of the effective additional information based on the interpretation and execution results of the control unit.

According to this configuration, even if the receiving device does not acquire new control information, it can switch directories based on the original information. Directory switching based on original information enables high-speed response to user operations.

Wherein the multiple streams include sound data corresponding to moving image data;

The extraction section also extracts sound data corresponding to moving image data from the broadcast wave;

The playback section may also be configured so as to play back the extracted audio data.

According to this configuration, it is possible to realize a dialogue program composed of contents including moving images, still images, and audio.

In order to achieve the purpose of recording the recording medium suitable for the program of the receiving device of the present invention, the receiving device includes the following parts: a receiving part, which receives a broadcast wave including a dialogue program composed of a plurality of contents connected to each other; an extracting part, A digital data stream is extracted from the broadcast; the replay unit replays the moving image data and outputs an image signal; the recording medium records a program comprising the following steps:

extracting a moving picture data from said broadcast wave, and control information in the same directory as the moving picture data;

storing the extracted control information in a memory inside the receiving device;

replay the extracted moving image data, and output an image signal;

Judging whether to perform a user operation indicating directory switching on the receiving device;

When a user operation instructing directory switching is effected, other directories displayed in the control information stored in the memory are extracted.

According to this recording medium, this program can be incorporated into an existing receiving device (satellite broadcast tuner), and the receiving device of the present invention can be easily produced.

Description of drawings

Various objects, advantages and features of the invention will become apparent from the following description, taken with reference to the accompanying drawings, which illustrate specific embodiments of the invention.

In these drawings:

Fig. 1 shows a plurality of directory examples that are played back while being switched by a receiving device;

Figure 2 is an enlarged left view of Figure 1;

Fig. 3 is the enlarged right view of Fig. 1;

Fig. 4 is the structure of the first implementation form of the digital broadcasting device and the receiving device of the digital broadcasting system of the present invention;

FIG. 5 shows an example of a plurality of categories constituting a dialogue program;

FIG. 6A and FIG. 6B show an example of moving image data stored in the display (prevention-ヨシ) information storage unit of the above embodiment;

6C and 6D show an example of audio data stored in the presentation information storage unit of the above embodiment;

7 to 11 respectively show an example of navigation information stored in the navigation (ナビゲ-ヨン) information storage unit of the embodiment;

FIG. 12 shows an example of a structure information table stored in the structure information storage unit of the embodiment;

FIG. 13 shows an example of entry (entry) information stored in the configuration information storage unit of the embodiment;

FIG. 14 shows an example of a multi-way information table stored in the multi-way information storage unit of the embodiment;

FIG. 15 shows an example of a directory identifier allocation table formed by the multiplexing control unit of the embodiment;

FIG. 16 shows an example of a plan (ba-jiyon) allocation table formed by the multiplex control unit of the embodiment;

17 to 21 each show an example of a navigation information table generated by the navigation information table generation unit in the embodiment;

FIG. 22A, FIG. 22B, FIG. 22C, FIG. 23, and FIG. 24 respectively show an example of NIT, SDT, EIT, PAT, and PMT generated in the system information table generating unit of the embodiment;

Fig. 25 shows the detailed part of Entry_Desriptor in the PMT generated in the system information table generating part of the embodiment;

26A to 26D show the detailed part of NE_Component_Descriptor in the PMT generated by the system information table generation unit in the embodiment;

FIG. 27A and FIG. 27B show the detailed part of stream_identifier_descriptor in the PMT generated by the system information table generation unit in the embodiment;

Fig. 28 is a schematic diagram of multiplexed transport streams in the multiplexing section of the embodiment;

Figure 29 is a schematic diagram of multiplexed transport streams in the transmit section of the embodiment;

Fig. 30～Fig. 32 are the flow charts illustrating the work of the data transmitting device of the embodiment;

33A and 33B show an example of filter conditions stored in a filter condition storage unit of the TS decoding unit in the above embodiment;

34A to 34D show examples of display images displayed on the display unit of the above embodiment;

35A and 35B show an example of a display image displayed on the display unit of the above embodiment;

Fig. 36 is a flowchart showing a schematic diagram of receiving processing of a dialogue program;

Fig. 37 is a flowchart showing in more detail the directory switching process shown in Fig. 36;

Fig. 38 is a flowchart showing in more detail the image data switching process shown in Fig. 37;

Fig. 39 is a flowchart showing in more detail the voice data switching process shown in Fig. 37;

FIG. 40 is a flowchart showing in more detail the navigation information switching process shown in FIG. 37;

Fig. 41 is a flowchart showing dialog control processing formed from navigation information;

Fig. 42 is a flowchart showing user I/F processing formed from navigation information;

Fig. 43 shows other dialog program example that is made up of 4 catalogues 10～13;

Figure 44～Figure 47 represent the navigation information corresponding to catalog 10～13;

Fig. 48 shows the navigation information corresponding to 4 categories 10-13;

FIG. 49 shows an example of a list displayed as one frame on the display screen on the receiving side;

Figure 50 schematically represents transmission data transmitted from the transmission side;

Figure 51 schematically represents the transmission of transmission data transmitted from the transmission side;

Fig. 52 is a structure of a data transmitting device and a data receiving device of a digital broadcasting system according to the second embodiment of the present invention;

53A and 53B each show an example of image data stored in the presentation information storage unit;

54 and 55 respectively show an example of navigation information stored in the navigation information storage unit;

FIG. 56 shows an example of a configuration information table and entry information stored in a configuration information storage unit;

Fig. 57 shows an example of the multi-way information table stored in the multi-way information storage unit;

FIG. 58 shows an example of a directory identifier allocation table created by the multiplexing control unit;

Fig. 59 shows an example of a display image information identifier allocation table created by the multiplexing control unit;

FIG. 60 shows a state where the identifier information adding unit adds VE_id to the image data bit stream dedicated area;

FIG. 61 and FIG. 62 each show an example of a navigation information table generated by the navigation information table generation unit;

63A, 63B, and 63C each show an example of a stream correspondence table generated by the stream correspondence information table generation unit;

Figure 64 is a mode of transport stream multiplexed in the multiplexing section;

Figure 65 is another mode of the transport stream multiplexed in the multiplexing section;

FIG. 66A shows an example of NIT generated by the system information table generation unit;

FIG. 66B shows an example of SDT generated by the system information table generation unit;

FIG. 66C shows an example of EIT generated by the system information table generation unit;

FIG. 67 shows an example of PAT generated by the system information generation unit;

FIG. 68 shows an example of the PMT generated by the system information table generation unit;

FIG. 69A shows the detailed part of Entry_Descriptor in the PMT generated by the system information table generation unit;

FIG. 69B shows the detailed part of NE_Component_Descriptor in the PMT generated by the system information table generation unit;

69C represents the detailed part of E_Information_Component_Descriptor in the PMT generated by the system information table generation unit;

FIG. 69D shows the detailed part of stream_idetifirer_descriptor in the PMT generated by the system information table generation unit;

Figure 70 is a schema of transport streams multiplexed at the transmit section;

Fig. 71, Fig. 72 and Fig. 73 respectively illustrate the working flow of the data transmitting device;

74A and 74B respectively show an example of filter conditions stored in the filter condition memory of the TS decoder unit;

75A, 75B, and 75C each show an example of a display image displayed on the display unit;

Fig. 76 is a flowchart illustrating the overall operation of the data receiving device;

77 to 80 are flowcharts illustrating the receiving control unit in detail;

Fig. 81 is a block diagram showing the configuration of a digital broadcasting apparatus according to the third embodiment of the present invention;

82A and 82B respectively show the structure information table for the stream-based directory and the structure information table for the page-based directory stored in the structure information storage unit;

Fig. 83 shows an example of the navigation information of the page base content including the flow base content link;

84A to 84C show modes of moving images;

Figure 85 and Figure 86 represent the corresponding relationship between the navigation information and the scenes in Figures 1 to 3;

87 to 95 respectively show specific examples of navigation information;

Fig. 96 shows a specific example of the navigation information table NVT;

Figure 97 shows an illustration of a Transport Stream multiplexed by a Transmitter;

Fig. 98 is a block diagram showing the structure of a data receiving apparatus according to the third embodiment of the present invention;

FIG. 99 shows a filter condition table showing a storage directory of a filter condition storage unit;

100 and 101 are flowcharts showing the control list of the reception control unit.

Detailed ways

Before explaining the configurations of the broadcasting device and the receiving device of the digital broadcasting system of the present invention, an outline of a talk program realized by broadcasting thereof will be explained first.

A broadcasting device of a digital broadcasting system broadcasts a dialogue program composed of a plurality of contents linked to each other. On the other hand, the receiving device receives the interactive program and plays back it while switching the contents of the interactive program with the user.

Here, the content is information that becomes a constituent element of the interactive program, and is called a playback unit that can be switched by user interactive operation of the receiving device. In this directory, there are two types called flow-based directory and page-based directory. The stream-based directory is a directory whose main content is moving images, and the page-based directory is a directory whose main content is still images.

FIG. 1 shows a plurality of contents played back while being switched by the receiving device. 2 and 3 show enlarged views of the left and right sides of FIG. 1, respectively. Connect Figure 2 and Figure 3 left and right with A-A' line.

In these figures, 100S to 105S, 105S', and 105S" each represent a stream-based directory, and 100 to 106 represent a page-based directory, respectively.

The table of contents 100S shows a menu composed of moving images and sounds displaying a world travel guide sequentially introducing countries in the world such as China, Japan, and Egypt, and a plurality of button images (hereinafter simply referred to as buttons) according to the countries being introduced. The keys correspond to other directories on the connection side as user objects. In this figure, some scenes (or frames) in moving images guiding countries are schematically shown in chronological order. For example, scene 100S1 represents a travel guide to China, and scene 100S2 represents a travel guide to Japan. Simultaneously with switching from the scene 100S1 to the scene 100S2, the menu in the scene is also switched from the Chinese menu to the Japanese menu. In addition, the link list of each key in the menu is also switched from the list for the Chinese travel guide (outside the picture) to the list for the Japanese travel guide.

The catalogs 101S, 102S, and 103S represent the same moving images and sounds as the catalog 100S, and character images such as menus for different countries being introduced, capture explanations for countries being introduced, and the like.

The table of contents 104S shows a menu composed of keys corresponding to the regions being introduced, displaying moving images and sounds of Japanese travel guides that sequentially introduce various places in Japan such as Osaka and Nara.

The menus 105S, 105S', and 105S" show the same moving images and sounds as those in the menu 104S, and menus with different regions in corresponding introductions.

The list 100P represents a key for displaying a still image of the world weather forecast and a link list for Japan, China, Hong Kong, etc. by country.

Tables 101P to 106P also represent still images showing weather forecasts for the countries and regions of the list of connection terminals and menus composed of keys corresponding to the connection terminals.

The content interactive program including the above is reproduced while interactively switching the content requested by the user in the receiving device. Each arrow line in the above figure shows an example of directory switching in the receiving device.

For example, in the replay of the scene 100S1, when the user selects and confirms the "weather" key, the receiving device can switch to the replay of the connection list 100P, as indicated by the arrow in FIG. 2 . This will allow you to see the main menu of still images that allow you to understand the world's weather. In this state, when the user selects and confirms the "Back" key during playback of the content 100P, the receiving device switches to playback of the broadcast scene 100S2 at that time as indicated by the arrow.

Like this, switch between the stream-based directory and the page-based directory.

Also for example, in the replay of scene 101S1 (with a submenu with transportation and accommodation to Japan as menu items), when the user selects and confirms the "transportation" key, as shown by the arrow line , the receiving device switches to playback of the scene 102S1 at the connected end. here. The user can get textual information representing capturing instructions about transportation to Japan. In this state, when the "return" key of scene 101S2 is selected and confirmed, the receiving device switches to playback of scene 101S2.

In this way, switch between stream-based directories.

Also for example, in the playback of the list 104P (the main menu for understanding the weather in Japan) in FIG. 106P playback. In this way, users can get the weather forecast of Osaka. In this state, when the return key of the list 104P is selected and confirmed, it switches to playback of the list 104P.

Like this, switch between page base directories.

The above is a brief description of the present invention. In the following, the constitution of the digital broadcasting system realizing the dialogue program composed of the stream-based content in the first embodiment is described; the constitution of the dialogue program composed of the page-based content in the second embodiment is explained; Realize the composition of the dialogue program in which the two types of catalogs are mixed.

1. The first implementation form

Before explaining the composition of the digital broadcasting system, the principle of the dialogue program composed of the stream-based content (in this embodiment, simply referred to as the content) will be explained.

The catalog 100S shown in FIG. 1 and FIG. 2 is shown by the following parts, displaying moving images and moving image data and sound data representing a world travel guide, and representing a menu composed of a plurality of keys according to the countries being introduced and supplementary explanations. Multiple navigation messages.

Wherein the navigation information may reflect the catalog setting of the active image in each arbitrary section. For example, it is the navigation information for the section of the China travel guide scene including the scene 1001 (as plan 1), the navigation information for the section of the Japan travel guide scene including the scene 1002 (as plan 2), and the section of the Egypt travel guide scene The navigation information used (as scheme N) and so on.

Contents 101S to 103S have moving image data and audio data representing the same world travel guide as directory 100S, and may have a plurality of navigation information reflecting moving image lists for each arbitrary section.

The reason why the receiving device can switch from the content currently being played back to the stream-based content is that the navigation information broadcast as follows is added to the video data and audio data by the broadcasting device.

That is, the navigation information is repeatedly transmitted by the broadcasting device over the playback time of the moving picture data. At this time, since the navigation information is prepared for each video data area, the navigation information is repeatedly transmitted in the interval.

For example, in the China travel guide scene section including the above-mentioned scene 100S1, in its playback time zone, the navigation information of scenario 1 is repeatedly transmitted. Also, in the section including the Japan travel guide scene of scene 100S2, the navigation information of scenario 2 is repeatedly transmitted in the playback time zone. The navigation information of plan N is repeatedly transmitted in the Egyptian travel guide section.

The reason why the navigation information is repeatedly transmitted is that the receiving device can immediately receive the switched navigation information when the content switching occurs and reception is started in the middle of the talk program broadcast. When the navigation information is dynamically set for each video data section, it is because the latest navigation information can be received at the time of switching.

In this way, in the original unidirectional broadcast system, interactivity with respect to the switching of the stream basic directory by the user operation of the receiving device is realized.

1-1 Digital Broadcasting System

Fig. 4 is a block diagram showing the configuration of the digital broadcasting system of the first embodiment.

This digital broadcasting system includes a digital broadcasting device 5101 and a plurality of receiving devices. In this figure, only one receiving device 5121 is shown as a plurality of receiving devices. In this digital broadcasting system, the digital broadcasting device 5101 broadcasts an interactive program composed of the above-mentioned stream-based directories (referred to as directories in this embodiment) connected to each other, and the receiving device 5121 is configured to perform interactive switching on the directory. while playing back.

In this embodiment, in order to make the description easier to understand, the configuration of the digital broadcasting apparatus 5101 and the receiving apparatus 5121 will be described using an example of a talk program consisting of four categories 0 to 3 shown in 5 .

Content 0 consists of scenes 01a to 01h, and is represented by moving images and sounds (not shown) for knowing the weather forecast in the Kansai region.

Scene 01a is a disconnection scene.

In scene 01b, keys 02b and 03b (image keys) are superimposed on the moving image. The 02b and 03b keys are connected to directories 1 and 2 respectively, and become the user directory switching operation objects of the receiving device 5121 . The same goes for scenes 01c-01h.

Furthermore, the list 1 is composed of scenes 11a to 11h, and is added to the moving image and sound (not shown) similar to the weather forecast of the list 0, and the text 13b to 13h information is added as in the above figure. The text information 13b to 13h is information supplementing the scene of the moving image such as the highest temperature, the lowest temperature, the humidity, and the probability of precipitation.

The key 12b and text information 13b of the scene 11b connected to the list 0 are displayed on the moving picture. The same applies to scenes 11c to 11h.

The content 2 is represented by moving images and sounds (not shown) for understanding the Kanto regional weather forecast. The keys 22b and 23b in the scene 21b are connected to the directory 3 and the directory 0, respectively.

The list 3 is represented by moving images and sounds (not shown) similar to those of the list 2, and text information is added thereto. The key 32b in the scene 31b is linked to the directory 2 .

The dialogue program composed of the above-mentioned four categories is played back in the receiving device 5121 as follows while interactively switching the categories requested by the user.

For example, in the receiving device 5121, when accepting the user's operation of the selection and confirmation key 02b in the playback of the scene 0 scene 01b, the receiving device 5121 switches the playback to the list 1 of the connected terminal. In this case, since the content is multiplexed and the playback time overlaps, the content 1 is not reproduced from the beginning, but the scene at the same time as the switching time of the content 0 is reproduced. Since the directory 1 includes the same moving images and sounds as the directory 0, the user viewing the directory 0 can use this switch without changing the moving images and sounds, and obtain supplementary instructions for weather pre-service based on text information.

1-2. Digital broadcasting device 5101

In FIG. 4, a digital broadcasting apparatus 5101 is provided with: a transmission data storage unit 5102, a multiplexing information storage unit 5104, a data multiplexing unit 4103, a system information table generating unit 5105, and a transmitting unit 5106. broadcast on the transmit wave.

The transmission data storage unit 5102 has a recording medium such as a magnetic disk, and stores all content data constituting the talk program. One category data is represented by presentation information indicating video data and audio data, and navigation information indicating links to other categories, keys, and text information. For example, moving images and sounds of each category in FIG. 5 are included in the presentation information. Also, key and text information displayed on the moving image, and hyperlinks provided to the keys are included in the navigation information.

The data multiplexing section 5103 generates a multiplexed stream that multiplexes the content data stored in the transmission data storage section 5102 . Specifically, the data multiplexing unit 5103 multiplexes the presentation information of each category so that the playback time overlaps, and at the same time repeatedly multiplexes the navigation information at the playback time of the presentation information of the same category. The reason for multiplexing the navigation information is to reliably receive the navigation information of the directory at the switching end no matter when the receiving device switches the directory.

The multiplexed stream is generated as a part of the transport stream according to the DVB-SI standard and the MPEG2 system standard. Among them, the transport stream is a collection of multiple digital data streams multiplexed in one carrier frequency band in digital satellite broadcasting, and there are frequency bands corresponding to 5 to 6 channels in the broadcasting channel.

The multiplexing information storage unit 5104 stores various parameters necessary for generating the multiplexed stream formed by the data multiplexing unit 5103 .

The system information table generation unit 5105 refers to the multiplex information storage unit 5104 and generates a system information table (consisting of a plurality of tables) necessary for the receiving device 5121 to select a multiplexed stream.

The transmitting unit 5106 multiplexes and transmits the multiplexed stream generated by the data multiplexing unit 5103 and the system information table generated by the system information table generating unit 5105 to the transport stream. Here, the system information table refers to various types of tables that record information for identifying the multiplexed stream representing the interactive program of the present invention from the transport stream.

1-2-1. Transmission data storage unit 5102

In FIG. 4, the transmission data storage unit 5102 has a presentation information storage unit 5107, a navigation information storage unit 5108, and a structure information storage unit 5109, and a plurality of catalog data constituting one dialogue program (application) is divided into presentation information and navigation information storage. , and store structural information representing the corresponding relationship between display information and navigation information.

1-2-1-1. Display information storage unit 5107

The presentation information storage unit 5107 stores presentation information represented by moving image data, audio data, and the like included in each directory.

In FIGS. 6A and 6B , each passing scene (or frame) represents moving image data used as presentation information of the list shown in FIG. 5 .

The moving image data 5201 shown in FIG. 6A has a file name "Video.0.m2v" indicating a moving image recording a Kansai weather forecast guide. This moving image is common presentation information in the directory 0 and the directory 1 shown in FIG. 5 .

The moving image data 5202 shown in FIG. 6B has a file name "Video.1.m2V" and represents a moving image in which the Kanto weather forecast guide is recorded. This moving image is common presentation information in the directory 2 and the directory 3 shown in FIG. 5 .

These moving image data 5201, 5202 are stored in the presentation information storage unit 5107 in a compressed form according to the ISO/IEC13818-2 (MPEG2 video) standard or the like. In addition, the format of image data may be other.

6C and 6D show examples of audio data used as presentation information.

The moving image data 5203 shown in FIG. 6C has a file name "Aidio.0.m2a", and is audio data reproduced in synchronization with the moving image data 5201 shown in FIG. 6A. This sound is presentation information shared by the content 0 and the content 1 shown in FIG. 5 .

The moving image data 5204 shown in FIG. 6D has the file "Aidio.1.m2a", and is audio data reproduced in synchronization with the moving image data 5202 shown in FIG. 6B. This sound is presentation information shared by the content 2 and the content 3 shown in FIG. 5 .

These audio data are stored in a compressed form according to the ISO/IEC 13818-3 (MPEG2 video) standard or the like. In addition, the format of the audio data may be other.

1-2-1-2, navigation information 5108

The navigation information storage unit 5108 stores navigation information constituting each category. The navigation information includes hyperlink information to other content and effective time information indicating the effective time of the navigation information. The high connection information is described as an object for realizing the user's interactive operation of the receiving device. Furthermore, the addition of valid time information is for sequentially updating and modifying the contents of the navigation information in the presentation information such as moving image data.

FIG. 7 shows an example of navigation information corresponding to the scene 01b (more precisely, scenes 01b to 01d) shown in FIG. 5 . The navigation information 5301 has a file name (Navi0-0.nif), including: a target definition table (Object Definition Tavle) 5302, a processor definition table (HsndlerDefinition Table) 5303, a high connection table (Hyperlink Table) 5304, a bit flag table ( Bitmap Table) 5305, effective time table (Time Information Table) 5306.

The object definition table 5302 is an information list showing object categories and attributes displayed superimposed on the activity data included in the presentation information, and specifically includes the following columns.

The column "Object Index (Object Index)" indicates a value (object number) for distinguishing an object in each object.

The column of "Type (Type)" shows the object type. Among the object types, there are key objects (Button) for displaying keys that provide high connection, image objects (Picture) for displaying still images and character information, and the like. In this example, the keys 02b and 03b shown in FIG. 5 are described as an object index value 0 and a key object, respectively. Also, character information 13b and the like shown in FIG. 5 are described as image objects.

The "X" column and the "Y" column are coordinate values indicating display reference positions on the display screen of each object such as a key or an image. In this way, the display positions of the keys 02b and 03b shown in FIG. 5 are determined.

The "Handler" column indicates a Handler Index value (Handler Index) for specifying which Handler is the Handler corresponding to the target among the Handlers in the Handling Definition Table 5303. The so-called processor is a program or an instruction word originally described in an executable programming language by the receiving device 5121 . In particular, the processor for the key object includes a directory switching instruction executed when the corresponding key is activated by user operation of the receiving means 5121 .

When the "Standard Bitmap (Normal Bitmap)" column is in the standard state (or non-selection state), on the display position indicated by the above-mentioned X, Y coordinates, in the bit mark image in the bit mark table 5305, it is indicated that it is used for specifying the application A bit flag index value indicating which bit flag image (image representing key image and still image information). The so-called non-selection state refers to a state in which a key is selected in the receiving device.

The processor definition table 5303 records the processor (original) specified on the target in the target definition table 5302 . Specifically, the following columns are included. The "Handler Link Index" column indicates the value (handler number) that distinguishes the processor. The "script" column indicates the processor (script) corresponding to the processor index. Especially for key object handlers, as shown in the above figure, including directory switching instructions like "goto_contents(Hyper Index 0)".

The high connection table 5304 indicates the number of references to the directory switching instruction in the processor definition table 5303 . Specifically, the following columns are included. The "Hyperlink Index" column indicates the value (hyperlink number) that distinguishes hyperlinks. The "directory number" column is high connection information itself, which is used as an argument of the directory switching command to indicate the directory number of the connection end. For example, the directory switching instruction called "goto_contents(Hyper Link Index 0)" mentioned above is the same as the result "goto_contents(Contents 1)", and is executed when the relevant key object becomes determined in the receiving device 5121.

The bit flag table 5305 records the bit flag data specified in the "standard bit flag" and "focus bit flag" columns of the object definition table 5302 . Specifically include the following columns. The "bitmap index (BitmapIndex)" column indicates a value (bitmap number) for distinguishing bitmap data. The "bitmap data" column records bitmap data representing key and text information superimposed on the presentation information. The key 02b of the scene 01b shown in FIG. 5 displays "Details of Osaka" of the flag index 0 in the standard state, and displays "Details of Osaka" of the flag index 1 in the selected state (obviously changes the color and density). The key 03b indicates "See Kanto" of the bit mark index 2 in the standard state, and displays "See Kanto" of the bit mark index 3 in the selected state.

The valid time table 5306 records the valid start time "start_time" when the navigation information becomes valid, and the valid end time "end_time" which becomes invalid. These times are designated by relative times (in units of seconds) where the broadcast start time of the talk broadcast program is set to "0".

Fig. 8 shows an example of navigation information corresponding to the scene 11b shown in Fig. 5 . The navigation information 5401 has a file name "Navil-nif", and includes an object definition table 5402, a processor definition table 5403, a bit flag table 5404, and an effective time table 5405.

The "0" row of the target index value of the target definition table 5402, the target type is "key", the coordinate value of the target display upper left end position on the display screen is X=20, Y=400, and the processing is started when the target is determined A processor with a register index value of "0" represents a bit flag with a bit flag index value of "0" in a non-selected state, and a bit flag with a bit flag index value of "1" in a selected state. The row of the object definition table 5402 whose object index value is "1" indicates that the object type is "image", the coordinate values of the upper left end position of the object on the display screen are X=300, Y=20, and the bit flag index value uses "2" bit flags.

Also, the processor definition table 5403 records the original "goto_entry" that is executed when the processor index value is "0". This command is originally a command to switch to the content to be reproduced first in the receiving device, that is, the defocused content at the start of reproduction, among the content of the talk program.

The bit flag table 5404 records bit flag data whose bit flag index values are "0", "1" and "2". Among them, the bit flag with the bit flag index value "2" indicates the character information 13b shown in FIG. 5 .

In addition, the valid time table 5405 defines that the valid start time of the navigation information 5401 is 5 seconds from the broadcast start time, and the valid end time is 65 seconds from the broadcast start. That is, this navigation information 5401 indicates that it will not be used after 65 seconds from the start of the broadcast.

The navigation information 5501 in FIG. 9 , the navigation information 5601 in FIG. 10 , and the navigation information 5701 in FIG. 11 also show an example in which navigation information is stored in the navigation information storage unit 5108 in the same way, corresponding to the scene of the catalog 0 shown in FIG. 5 . 01e, scene 11e of directory 1, scene 21b of directory 2.

1-2-1-3. Structure information storage unit 5109

The structure information storage unit 5109 stores a structure information table which is a list of display information and navigation information groups constituting each content, and entry information. The entry information stores entry information indicating the entry directory number to be reproduced first when the reproducing of the talk program is started in the receiving device 5121 .

FIG. 12 is a diagram showing an example of a structure information table stored in the structure information storage unit 5109 . The structure information table 5801 indicates, for each directory number, a combination of image data, audio data, and navigation information included in each directory. The catalog number is a number for uniquely identifying one catalog among plural catalogs stored in the transmission data storage unit 5102 . However, although the catalog number corresponds to one catalog in principle, there are exceptionally cases where a plurality of catalog numbers correspond to each other.

The row of the directory number 0 in the structure information table 5801 in the above figure indicates that the directory 0 shown in FIG. The audio data identified by "Audio0.m2a" and the file names "Navi0-0.nif", "Navi0-1.nif", "Navi-2nif", "Navi0-3. nif", "Navi0-4.nif" to identify the navigation information group composition. Each navigation information recorded in the "Navigation Information" column is described in order of effective start time. The same goes for other lines.

FIG. 13 shows an example of entry information stored in the configuration information storage unit 5109 . Entry information 5901 indicates that the directory number of the entry directory of the application stored in transmission data storage unit 5102 is "0".

1-2-2. Multi-channel information storage unit 5104

The multiplex information storage unit 5104 stores, as a multiplex information table, resource allocation information for multiplexing a talk program into identifiers, areas, and the like in an MPEG2 transport stream for broadcasting.

FIG. 14 shows an example of multiple information stored in the multiple information storage unit 5104 . The multiplex information table 6001 in the above figure is a table showing the assignment of various identifiers and transmission capacity (transmission capacity) to interactive programs and their components.

In the figure, columns 6002 to 6005 of "Original_network_id, transport_stream_id, service_id, and event_id" indicate various identifier values assigned to interactive programs when the interactive programs are multiplexed in the broadcast MPEG2 transport stream. In a typical satellite digital broadcasting system, a plurality of MPEG2 transport streams are transmitted using different carriers through one satellite (network). Each broadcast program is multiplexed by providing original_network_id, transpot_stream_id, service_id, and event_id in any MPEG2 transport stream according to the ETS360 488 (DVB-SI) standard.

Among them, original_network_id is an identifier for uniquely identifying one network.

The transport_stream_id is an identifier for uniquely identifying one transport stream in one network.

Service_id is an identifier for uniquely identifying one type of service in one transport stream.

event_id is an identifier for uniquely identifying one event in one service.

Here, the event is equivalent to one program of conventional analog broadcasting. The above talk program is multiplexed as one event. An event of digital broadcasting is called a collection of parts.

A part is a stream (program unit) identified by a DID (packet identifier) in the ISO/IEC 13818-1 (MPEG2 system) standard, and represents one of program constituent elements such as moving images and audio. For example, a set of individual image data, individual audio data, and navigation information in the same directory shown in FIG. 12 is each part.

The service is a chronological sequence of events, and corresponds to one channel of an existing analog broadcast. The dialogue program becomes part of 1 service time.

A delivery stream is a collection of multiple services. The transport stream and the service range (transmission capacity) consider various allocations, for example, the transport stream is about 30 Mbps, and one service is about 5 Mpbs. In this case, one transport stream corresponds to six channels. Also, the transmission capacity of the talk program as the above-mentioned event varies depending on the content because moving images are included.

Programs (events) broadcast by the digital broadcasting system conforming to the DVB-SI standard can be unilaterally specified in all digital broadcasting systems by specifying the above-mentioned group of orginal_network_id, transport_stream_id, service_id, and event_id. Details about original_network_id, transport_stream_id, service_id, and event_id are described in the DVB-SI specification.

The "PMT-PID" column 6006 and the "PCR_PID" column 6007 indicate the values of the PIDs assigned to the names PMT (Program Map Table) and PCR (Program Clock Reference). Among them, the so-called PMT is one of the system information tables multiplexed in the transport stream, and is a packet identifier (PacketIdentifier: PID) indicating each stream (part) of moving image data and audio data included in the event and its transmission. ) table of corresponding relations. The so-called PCR is one of the system information tables, and in the digital broadcasting apparatus 5101, it is time information used as a reference when each content data is multiplexed in the multiplexed stream, and in the receiving apparatus 5121, it is time information when an event is reproduced. Baseline time information.

The "NE_Component(0)_Bitrate" column 6008 and the "NE_component(0)_pid" column 6009 indicate the transmission rate and the PID value of the part assigned to the person who transmits the navigation information included in the directory 0, respectively. The same applies below the "NE_component(1)_Bitrate" column. In addition, NE is an abbreviation of Navigation element.

The "VE_component(0)-Bitrate" column 6010 and the "VE_component(0)_pid" column 6011 respectively indicate the transmission rate assigned to the part that transmits the image data corresponding to the component tag (compo-nettag) value "0X00" described later, and PID values. The same applies to "VE_component(1)_Bitrate" and below. In addition, VE is the abbreviation of Video Element.

The "AE_component(0)_Bitrate" column 6012 and the "AE_component(0)_pid" column 6013 respectively indicate the transfer rate assigned to the part that transmits the image data corresponding to the part flag value "0X00" described later, and the PID value. The same applies to "AE_component(1)_Bitrate" and below. In addition, AE is an abbreviated form of 10 Element.

In addition, in this embodiment, in order to identify the navigation information, although the number of PIDs that transmits only the number of directories is ensured, the number of PIDs that transmits the navigation information may be less than the number of directories, for example, one. In this case, it is sufficient to use a combination of PID and other parameters (for example, table_id_extension according to the MPEG2 standard) as information for identifying navigation information. It is also possible to identify the image data and audio data included in the presentation information by combining the PID with other references (eg, stream_id set in the MPEG2 standard, etc.) at the same time. In this way, even if the number of PIDs that can be used in the delivery stream is limited, multiple directories that exceed the limit can be sent.

1-2-3 Data multiplexing section 5103

In FIG. 4, the data multiplexing unit 5103 first (a) assigns various identifiers to each category stored in the transmitted data storage unit 5102 (creates a category identifier assignment table), and (b) assigns The navigation information provides a plan number (preparation of a plan number allocation table), and (c) instructs the navigation information table generation part 5111 to prepare a navigation information table, (d) instructs the system information table generation part 5105 to generate a system information table, ( e) Each display information is multiplexed based on these tables so that the playback time is repeated, and at the same time, the navigation information corresponding to this is repeated multiple times in the playback time area of each display information. Therefore, the data multiplexing unit 5103 includes a navigation information table generating unit 5111 and a multiplexing unit 5112 .

The above (c) is executed by the navigation information table generating section 5111 , and the above (a), (b), and (c) are navigated by the multiplex control section 5110 . And the above (d) is executed by the system information table generating unit 5105 .

1-2-3-1 Multi-channel control unit 5110

The multiplexing control unit 5110 is composed of a CPU, a ROM for storing programs, and a working RAM, etc., and creates a directory identifier allocation table and a plan number allocation table [above (a), (b)]. Based on these tables, each display information and each The multiplexing instruction of the navigation information is notified to the multiplexing unit [above (e)]. Among them, the so-called multi-channel indication refers to moving image data and audio data in the presentation information, various navigation information, including various identifiers required for multiplexing, multiplexing start position in the transport stream, transmission speed, and the like.

To describe (e) in more detail, the multiplexing control unit 5110 creates a multiplexing instruction for the moving image data and audio data in the presentation information so that the playback time is superimposed. For example, setting those multiple start positions at the same time makes multiple instructions. Also with respect to the navigation information, a multiplexing indication is generated so that the multiplexing is repeated through the playback time region of the presentation information in the table of contents including it. That is, a plurality of multi-way start positions are set in the navigation information, and a plurality of multi-way instructions are created.

1-2-3-2 Multiplexing control unit 5110: (a) Create directory identifier assignment table

The multiplexing control unit 5110 is activated by the transmitting unit 5106, reads the configuration information table and the multiplexing information table stored in the configuration information storage unit 5109 and the multiplexing information storage unit 5104, and creates a directory identifier assignment table.

FIG. 15 is a diagram showing an example of a directory identifier allocation table generated based on the configuration information table 5801 shown in FIG. 12 and the multiplex information table 6001 shown in FIG. 14 .

In the directory identifier assignment table 6101, corresponding to each directory number 6102, the "orig_nw_id" column 6103, the "ts_id" column 6104, the "VE_SVC_id" column 6105, and the "VE_event_id" column 6106 are written in the multiple information table 6001. Values in "original_network_id" column 6002, "transport_stream_id" 6003, "service_id" 6004, and "event_id" column 6005. Similarly, "service_id" column 6003 and "event_id" column are written in "AE_SVC_id column 6108" and "AE_event_id" column 6109 Each value of 6005. The same applies to the "NE_SVC_id" column 6111 and the "NE_event_id" column 6112.

In addition, in the "VE_comp_tag" column 6107, a part tag of the second bit of hexadecimal is provided and written in order from "0X00" for each image data. Among them, "0x00" and "0x00" are respectively provided and written for the image data "Video0.m2V" and "Video1.m2v".

This partial flag is used for a 1-to-1 correspondence in the PID with an indirect reference to the PID with a freely assignable value. In the present embodiment, the partial flags whose value is "N" correspond to the PIDs provided in "VE_component(N)_pid" of the multiplexing information storage unit 5104, respectively. The correspondence relationship between partial flags and PIDs will be described in PMT described later. Therefore, in the receiving device 5121, the PID is determined by referring to the partial flag described in the descriptor of the PMT, and image data and the like can be obtained. Assuming that the dialogue program is multiplexed together with other programs by the transmission unit 5106, even if the PID in the system information table is rewritten to another value, there is an effect that image data can be obtained reliably.

In addition, if part of the tag is not used, it may also be considered to directly specify the PID value in the "VE_comp_tag" column and "AE_comp_tag" column. In this case, when the transmission unit 5106 is used to multiplex the transport stream, when rewriting the PID in the system information table to a separate value, only by rewriting the PID values in these columns in the navigation information table to correspond That's fine.

In the "AE_comp_tag" column 6110, a partial tag is also provided and written for each audio data. Among them, "0X00" and "0X01" are provided and written to the audio data "Audio0.m2a" and "Audio1.m2v", respectively.

In addition, in the directory identifier allocation table 6101, the hexadecimal 4th digit value is written in the order of the directory number 6102 in the "NE_id" (navigation information identifier) column 6113 while being incremented by 1.

In addition, the "VE_id" column and the "AE_id" column in FIG. 15 are information for identifying the page base directory. In the first embodiment, the "VE_id" column and the "AE_id" column are not used because the premise is that the dialogue program consists only of the stream-based contents. Details will be described after the second embodiment.

1-2-3-3 Multi-channel control unit 5110: (b) Preparation of plan number allocation table

When the multiplexing control unit 5110 completes creating the directory identifier allocation table 6101, it creates a plan number allocation table.

Specifically, the multiplexing control unit 5110 refers to the configuration information table 5801, and provides plan numbers from "0" to "1" each time the directory number is first described in the navigation information included in the directory. In addition, when the plan number exceeds "31", plan numbers larger than "1" are also provided in order from "0".

FIG. 16 shows an example of this plan number assignment table. For example, scheme numbers called "0X00", "0X01", "0X02" are provided on the navigation information "Nario_0.nif", "Navio_1.nif", "Navio-2.nif", . . . of directory 0 .

The same applies to directories 1 to 3.

Once the creation of the plan number assignment table 6201 is completed, the multiplexing control unit 5110 instructs the navigation information table creation unit 5111 to create a navigation information table.

1-2-3-4 Navigation information table generation unit 5111: (c)

When the navigation information table generation unit 5111 receives the instruction to generate the navigation information table from the multiplexing control unit 5110, it generates a navigation information table in which the connection terminal directory number in the high-connection table is replaced with various identifiers indicating each part included in the connection terminal directory. Information Sheet.

More specifically, the navigation information table generation unit 5111 reads the navigation information stored in the navigation information storage unit 5108, and when the navigation information includes a high connection table, refers to the directory identifier assignment table created by the multiplexing control unit 5110, Convert the connection terminal information recorded by directory number into records of various identifiers to generate a navigation information table.

Further, the navigation information table generation unit 5111 stores the generated navigation information in a storage area (not shown) as a navigation information table under a file name called NVT (Number of Contents, Project Number). The directory number and the plan number are obtained by referring to the structure information table in the structure information storage unit 5109 and the plan number assignment table in the multiplexing control unit 5110 . When the navigation information table generation unit 5111 reads out a high connection table, only the file name is changed and stored in the storage area.

FIG. 17 shows the navigation information table 6301 of the generated file name "NVT(0,0)". This navigation information table 6301 is generated from the navigation information 5301 of the file name "Navio-0.nif" shown in FIG. 7 and corresponds to the scene 01b shown in FIG. 5 .

The navigation information table 6301 includes a target definition table 6302 , a processor definition table 6303 , a high connection table 6304 , a bit flag table 6305 , and a valid time table 6306 . It is the same as the navigation information 5301 shown in FIG. 7 except for the high connection table 6304 and the file name.

In the high connection table 6304, each directory number in the high connection table 5304 of FIG. 7 is converted into records of various identifiers recorded in the identifier assignment table 6101 shown in FIG. 15 . Record "-" in the "Orig_nw_id" column of the high connection table 6304. If no identifier is recorded, it means that the identifier value in the directory to which the navigation information table 6301 belongs and the directory of the connection end are the same, so the record is omitted.

In this example, the "Hgperlink Index 0" column indicates a link from scene 01b of directory 0 shown in FIG. 5 to scene 11b of directory 1. In the "Hyperlink index O" column, since "-" is set to anything other than the "NE-id" column, the directory 0 means that only the navigation information table (NE_id) is different.

Also, the "Hyper link 1" column indicates a connection from the scene 01b of the content 0 shown in FIG. 5 to the scene 21b of the content 2. In the "Hyperlink Index 1" column, "VE_comp_tay",

Since the columns other than "AE_comp_tag" and "NE_id" are "-", the content 0 means that the image (VE_comp_tag), audio (AE_comp_tag) and navigation information table (NE_id) are different from the connection side content 2.

Assuming that the directories at the connection end belong to different services, then in "VE_service_id",

Each identifier is described in both "AE_service" and "NE_service_id. As mentioned above, when the identifier value is the same, the record can be omitted, and the size of the navigation information table can be reduced.

In addition, the "VE_id" column and the "AE_id" column in the hyperlink table of FIG. 17 are information for identifying the page base directory. In NVT (0, 0), since all connection ends are stream-based directories, nothing is written in the "VE_id" and "AE_id" columns. When the connection end is a page base directory, it will be described after the second embodiment.

Fig. 18 shows the navigation information table 6401 of the file name "NVT(1,0). This navigation information table 6401 is generated by the navigation information 5401 of the file name "navil-0.nif" shown in Fig. 8, corresponding to Fig. 5 Scene 11b of List 1 is shown.

Since this navigation information table 6401 does not have a high connection table in the navigation information table 5401, it is the same directory. However, the link from the scene 11b of the list 1 to the list 0 is indicated by the handler definition table 6403 of the above figure and the entry information shown in FIG. 13 .

Similarly, Fig. 19 shows the navigation information table 6501 of the file name "NVT (0, 1), Fig. 20 shows the navigation information table 6601 of the file name " NVT (1, 1), and Fig. 21 shows the navigation information table 6601 of the file name "NVT (2, 0) The navigation information table 6701 of , respectively, is shown by the navigation information 5501 of the file name "navi0-1.nif" shown in Figure 9, the navigation information 5601 of the file name "navil-1.nif" shown in Figure 10, and the navigation information 5601 shown in Figure 11 The navigation information 5701 of the file name "navi2-0.nif" is generated.

The navigation information table generation unit 5111 notifies the multiplexing control unit 5110 when the generation of the navigation information table is terminated. Thereafter, upon receiving the completion of the generation of the navigation information table, the multiplexing control unit 5110 instructs the system information table generation unit 5105 to generate the system information table. Generation (d) of the system information table will be described later.

1-2-3-5 Multiplexing control unit 5110: (e) Preparation of multiplexing instructions

When the multiplexing control unit 5110 accepts that the generation of the system information table has been completed, the multiplexing control unit 5110 first reads the “PCR_RID” value from the multiplexing information storage unit 5104 and notifies the multiplexing unit 5112 of the value. Here, the multiplexing unit 5112 multiplexes time information (PCR) used as a reference for multiplexing each content data in the multiplexed stream.

Next, the multiplex control unit 5110 forms a multiplex instruction to present information, and notifies the multiplexer 5112 of the instruction.

Specifically, in order to multiplex the display information of all the content by reselecting its playback time zone, the multiplexing control unit 5110 sets the multiplexing start position to "0" for the image data and audio data included in all the content. , make multi-channel instructions and notify them. Wherein, the multi-channel start position is a relative time when the transmission start time of the multi-channel stream is assumed to be 0.

Each multiplex indication of image data and audio data, including multiplex start position, PID, bit rate. For example, for the image data "Video0.m2V" of directory 0 in the structure information table 5801, the multiplexing control unit 5110 first refers to the directory identifier allocation table 6101, reads the value "0x00" of the "VE_comp_tag" 6107 of the image data, and then Read "VE_component(0)_pid" 6011 value "0×0096" from multi-channel information table 6001, seek the PID of its image data, read "VE_component(0)_Bitrate" 6010 value "4Mbps", seek bit rate, together with The multiplex start position notifies its PID, and its bit rate.

Next, the multiplexing control unit 5110 notifies the multiplexing unit 5112 of the multiplexing instruction related to the navigation information as follows.

The multiplexing control unit 5110 creates a multiplexing instruction for each content so that the multiplexing is repeated during the effective time of the navigation information table included therein. For example, in the case of the navigation information table 6301 [NVT (0, 0)] shown in FIG. The way control unit 5110 repeatedly creates a multi-way instruction of NVT (0, 0). However, in this embodiment, it is set to be multiplied by a predetermined time (for example, 1 second) earlier than the effective start time. The purpose of multiplexing from a certain time ago is to provide a margin for the navigation information table processing of the receiving device 5121 .

The multi-way indication of navigation information includes its PID, its transmission capacity (bit rate), scheme number, table_id_ext.

For example, when multiplexing the navigation information table with the file name "NVT(0,0) shown in Fig. 17, the multiplexing control unit 5110 sets a fixed time (4 seconds) before the valid start time as the first multiplexed table. Road start position, read the value "0X0092" of "NE_component(0)_pid" 6009 from the multi-channel information table 6001, and the value "1Mbps" of "NE_component(0)_Bitrate" 6008, and notify the multi-channel as PID and bit rate respectively The multiplexing unit 5112. And, the multiplexing control unit 5110 reads the value “0×0000” of the “NE_id” 6113 corresponding to the directory number 0 from the directory identifier allocation table 6101, and notifies the multiplexing unit 5112 as table_id_extension .

In addition, the multiplexing control unit 5112 calculates the transmission capacity (bit rate) ensured for the transmission and use of the navigation information as the next multiplexing start position by dividing by the size of the navigation information table, and notifies the multiplexing instruction in the same manner as above. .

The multiplex control unit 5110 thus creates a multiplex instruction and notifies the multiplexer 5112 when the valid end time is reached, and sequentially finds the multiplex start positions. Thus, the above-mentioned NVT (0, 0) is multiplexed 4 to 65 seconds after the start of the multichannel stream.

As described above, the multiplexing control unit 5110 even compares NVT (0, 1), NVT (0, 2) ... included in directory 0 and NVT (1, 0), NVT (1, 1) Other NVTs such as .

1-2-4 System information table generation unit 5105: (d)

The system information table generating unit 5105 generates a system information table upon receiving an instruction from the multiplexing control unit 5110 . The so-called system information table refers to various information for identifying multiplexed streams among transport streams, that is, various tables that record various information necessary for the receiving device 5121 to select an event.

More specifically, first, the system information table generation unit 5105 refers to the multi-channel information storage unit 5104, and generates NIT (Network Information Table), NIT (Network Information Table) and EIT (Event Information Table), SDT (Serrice Description Table) and PAT (Program Association Table).

Among them, the NIT records physical information on transmission lines and the like for transport streams transmitted from a specific network. FIG. 22A is an example of NIT 6801 generated by the system information table generating unit 5105. In the network whose network_id is identified by "0X0001", the transport stream whose original_network_id is identified by "0X0001" and transport_stream_id is identified by "0x0001" is allocated, and the standard about its frequency and modulation method is expressed by "transmission thread".

The SDT records information on service names and the like of each service included in a specific transport stream. FIG. 22B is an example of SDT 6802 generated by the system information table generating unit 5105. In the transport stream whose transport_stream_id is identified by "0x0001", the service whose Service_id is identified by "0X0002" is included. Information such as the service name is displayed by "information such as service name".

The EIT records event names and information on start time, end time, and the like for each event included in a specific service. FIG. 22C is an example of EIT6803 generated by the system information table generating unit 5105. In the service whose service_id is identified by "0X0002", the event whose event_id is identified by "0X0002" is included, and the information indicating the event name etc. by "event name etc. information" is displayed.

The PAT records the PID of the PMT (Program Table) regarding each program included in a specific transport stream. FIG. 23 is an example of PAT6901 generated by the system information table generating unit 5105. In the transport stream whose transport_stream_id is identified by "0x0001", the program which identifies program_no by "0x0002" is included, and the PID indicating its PMT is "0x0090". The program corresponds to an event in agreement with program_id.

Then, the system information table generation unit 5105 refers to the multiplex information storage unit 5104, the multiplex control unit 5110, and the configuration information storage unit 5109, and generates a program corresponding to multiplexing the transmission data stored in the transmission data storage unit 5102 according to the provisions of the MPEG2 system standard. PMT. FIG. 24 is a diagram showing an example of a PMT created from the multiple information table 6001 shown in FIG. 14, the directory identifier allocation table 6101 shown in FIG. 15, and the entry information 5901 shown in FIG.

When the PMT 7001 is generated, "Program_nwmber" is a value indicating the program number of the program (event) that multiplexes the transmission data, and the value "0X0002" of the "service_id" 6004 of the multiplexing information table 6001 is written therein.

Furthermore, "PCR_PID" is a value indicating the PID of a packet including clock information (PCR), and the clock information serves as a reference when decoding the program. The "PCR_PID" value "0X0091" of the multiplex information table 6001 is written thereon.

Also, "Entry_Descriptor" 7003 is a descriptor including entry directory identifier information that is reproduced first when the program is selected. FIG. 25 is a detailed diagram showing "Entry_Descriptor" included in PMT7001. The descriptor_tag of "Entry_Descriptor" 7003 is an identifier indicating the type of the descriptor, and a value limited to the use of "Entry_Descriptor", such as "0X98", is written. "entry_VE_comp_tag," "entry_AE_comp_tag," and "entry_VE_id" represent identifier values for identifying image data, audio data, and navigation information constituting the entry directory, respectively.

In generating the PMT, the system information table generating unit 5105 refers to the entry information 5901 to obtain the entry directory number "0", and fetches the value of "VE_comp_tag" 6107 of the entry corresponding to the entry directory 6101 from the entry identifier allocation table 6101. "0X00", "AE_comp_tag" 6110 value "0X00", "NE_id" 6113 value "0X0000", write "entry_VE_comp_tag", "entry_AE_comp_tag", "entry_NE_id" respectively.

In addition, table 7004 shows the correspondence between "Stream_type" 7006 indicating the type of data transmitted in each directory and "descriptor" 7006 indicating additional information, for each value of "PID" 7005 of a part constituting the program. In the first line of the table 7004, the value "0X0092" of "NE_component(O)_pid" 6009 and the value "0X05" indicating that the type of data to be transmitted is segment data are respectively written in the multiplexing information table 6001. And "NE_component_Descriptor(0) 7201" shown in FIG. 26A. "NE_component_Descriptor(0) indicates that the navigation information having the value of NE_id not less than the value of "min_NE_id" and not more than the value of "max_NE_id" is transmitted in the portion provided. In this embodiment, since the directory navigation information of directory number 0 is multiplexed in the part identified by "NE_component(0)_pid" 6009, the "NE_id" corresponding to directory number 0 is allocated by the directory identifier assignment table 6101 6113 The value "0X0000" is written on "min_NE_id" and "max_NE_id". In addition, a value (here, "0X99") specified to indicate the type of the descriptor is written in "descriptor".

From the 2nd line to the 4th line of the table 7004, the values of "NE_component(1)_pid", "NE_component(2)_pid", and "NE_component(3)_pid" are read out from the multiplex information table 6001, and the diagrams are provided respectively. NE_component_Descriptor(1) 7202 shown in FIG. 26B , NE_component_Descriptor(2) 7203 shown in FIG. 26C , and NE_component_Descriptor(3) 7204 shown in FIG. 26D are the value “0X05” of “stream_type” and “Descripor”.

In the fifth line of the table 7004, the value "0x0096" of "VE_component(0)_pid" 6011 and the value "0x02" indicating that the type of data to be transmitted is image data are respectively written in the multi-channel information table 6001, as shown in FIG. 27A "Stream_identifier_descriptor(0)" 7301 shown. "stream_identifier_descirptor(1)" 7301 indicates that the part flag value of the part providing the directory is "0X00". The "descriptor_tag" value is a predetermined value indicating a descriptor type, for example, "0X52".

In the sixth line of the table 7004, the "VE_component(1)_pid" value, the "stream-type" value, and the "stream_identifier_descriptor(1)" 7302 shown in FIG. 27B are also written in the multiplexing information table 6001.

On the 7th and 8th lines of the table 7004, the "AE_component(0)_pid" value, the "AE_component(1)_pid" value, and the value "0X03" representing the audio data as "stream_type" are also written in the multiplex information table 6001 , "stream_identifier_descriptor (0)" 7301, "Stream_identifier_descriptor (1)" 7302.

1-2-5 multiplexing section 5112

The multiplexing unit 5112 multiplexes the content data on the MPEG2 transport stream in accordance with the method specified by the MPEG2 system specification according to the multiplexing instruction from the multiplexing control unit 5110, and sequentially outputs the generated transport stream data to the transmitting unit 5106.

That is, once the multiplexing unit 5112 receives the multiplexing instruction of image data from the multiplexing control unit 5110, it reads the image data from the display information storage unit 5107, converts it into a data stream, and uses the specified PID and bit rate to start from the specified start position. Multiplexes related data streams in a delivery stream. And, when receiving a multiple instruction of audio data from the multiplexing control unit 5110, the audio data is read from the presentation information storage unit 5107, converted into a data stream, and transmitted from the designated start position using the designated PID and bit rate. Stream multiplexes related data streams.

In addition, if the multi-way instruction of the display information table is received from the multi-way control unit 5110, the navigation information table is read from the navigation information table generation unit 5111, converted into a data stream, and the specified PID, table_id_extension, version_no, bit rate, Multiplexes related data streams by delivering the stream's specified start position.

Furthermore, the multiplexing unit 5112 sets the initial value of the header of the generated transport stream to “0) for the PCR, and performs multiplexing using the notified PCR-PID by the multiplexing control unit 5110 .

FIG. 28 is an explanatory diagram of a multiplexed stream generated by the multiplexing unit 5112 . In this figure, the horizontal axis represents the elapse of time, and the vertical axis simultaneously represents the multiplexed content data and PCR.

In 7401 in the above figure, the video data "Video0.m2v" common to directory 0 and directory 1 is converted into a data stream by the multiplexing unit 5112, and the video data stream of PID "0X0096" is provided again. Although this moving image stream 7401 is shown continuously, it is actually divided into fixed-length packets (188-byte long transport stream packets are shown) by the multiplexing unit 5112, and multiplexed so as to occupy the assigned bit rate (4 Mbps). . Similarly, 7402 is a moving image data stream common to directory 2 and directory 3 .

In 7403, the audio data "Audio.m2a" common to directory 0 and directory 1 is converted into a data stream by the multiplexing unit 5112, and the audio data stream with PID "0X0098" is also provided. Make this multiplex to occupy the assigned bit rate (0.5Mbps). Similarly, 7404 shares audio data stream with directory 2 and directory 3.

7405 is a data stream loaded with the navigation information table included in the directory 0, and is multiplexed by the multiplexing unit 5112 so as to occupy the assigned bit rate (1 Mbps). Each navigation information table in the data stream 7405 provides PID "0X0092", table_id_extension "0X0000", and Version-no "0X00-0X04". Regarding these navigation information tables, the same plan number is multiplexed, and the plan number is updated together with the elapsed time. In addition, PID, table_id_extension, and Version_no are used in the receiving device 5121 to identify a navigation information table in the data stream 7405 . Similarly, 7406-7408 are respectively loaded with the data streams of the navigation information included in the directories 1-3.

7409 is the time information PCR used as the playback time reference, and is multiplexed.

In addition, the multiplexing unit 5112 multiplexes the time information PCR used as the reference of the playback time.

In addition, the multiplexing unit 5112 performs multiplexing whenever receiving a multiplexing instruction from the multiplexing control unit 5110, generates a multiplexed stream in an intermediate state, stores it in a storage unit not shown, and terminates all multiplexed streams. Instruction processing can also be output to the transmission unit 5106 after forming a complete multichannel stream. The multichannel instruction from the multiplex control unit 5110 is not processed immediately, but is stored in a storage unit not shown. After the necessary multichannel instruction is provided, Multiple streams are generated by multiplexing in time order, and may be sequentially output to the transmitting unit 5106 .

1-2-6 Transmitter 5106

The sending unit 5106 has a scheduler for sending the delivery stream, and if it is a certain time ahead of the start time of event sending, for example, 5 minutes, the multi-channel control unit 5110 is started. When the event transmission start time is reached, in the multiplexed stream output by the multiplexing unit 5112, the system information table generating unit 5105 is generated at predetermined intervals using a specific PID according to the DVB-SI standard and the MPEG2 system standard. System information tables such as NIT, PAT, PMT, SDT, and EIT are repeatedly multiplexed, processed such as modulation, and transmitted as a transport stream to the receiving device 5121 and the like.

FIG. 29 is an explanatory diagram showing transport streams multiplexed by the transmission unit 5106 . The system information of NIT, PAT, PMT, SDT, and EIT is multiplexed by adding to the multiplexed stream multiplexed by the multiplexing unit 5112 . In addition, although a plurality of events (programs) are multiplexed by the transmitting unit 5106 in the transport stream, events (programs) other than the dialogue programs shown in FIG. 5 are omitted in the above-mentioned figure.

1-2-7 Operation of digital broadcasting device 5101

The operation of the digital broadcasting apparatus 5101 according to the embodiment of the present invention constructed as described above will be described below.

FIG. 30 is a flowchart showing the overall processing of the directory by the digital broadcasting apparatus 5101.

Multi-channel control section 5110 first does the following processing: (a) make directory identifier allocation table [S (step code number) 7602], (b) make scheme number allocation table (S7604), (c) navigation information table generation instruction (S7606), (d) system information table generation instruction (S7608). After the system information table is generated by the system information table generation unit 5105, the multiplexing control unit 5110 reads the "PCR_PID" value from the multiplexing information storage unit 5104, and notifies the multiplexing unit 5112 (S7610).

Next, the multiplexing control unit 5110 instructs the multiplexing unit 5112 to multiplex the presentation information (S7611), and instructs the multiplexing unit 5112 to multiplex the navigation information (S77-0, S77-1, . . . S77-n). At this time, the multi-path control unit 5110 generates, for example, n+1 tasks for n+1 directories from directory 0 to directory n, and performs the above-mentioned S77-0, S77-1, ... S77- n processing.

Fig. 31 shows a more detailed flow of the above presentation information multiplex instruction creation. In the figure, i is a variable used to sequentially calculate the catalog number.

The multiplexing control unit 5110 initializes the variable i to 0 (S7612). The multiplexing control unit 5110 refers to the configuration information storage unit 5109, and determines whether or not the image data of the directory with the directory number i has been multiplexed (S7614, S7616).

The operation of this determination is based on checking whether the same image data as that of the directory number i is included in the directory with the directory number smaller than 1. For example, when the structure information table 5801 shown in FIG. 12 is used for determination and the directory counter i is "1", the directory number 0 includes the same image data "Video0.m2v", so it is immediately determined that it is multiplexed. .

In the case of already multiplexing, image data is not multiplexed. If there is no multiplexing, the multiplexing unit 5112 is instructed to multiplex the content image data of the content number i (S7618). At this time, the multiplexing control unit 5110 notifies the multiplexing unit 5112 of the multiplexing start position, the PID, and the bit rate value together. Notify "0" (head of transport stream) as the multipath start position.

At that time, the multiplexing control unit 5110 refers to the multiplexing information storage unit 5104 as the PID value, reads out the partial bit rate corresponding to the partial flag assigned to the image data to be multiplexed, and notifies it.

For example, when multiplexing the content image data "Video0.m2v" of the content number 0 in the structure information table 5801, the multiplexing control unit 5110 first refers to the content identifier allocation table 6101, and reads out the "VE_compo_tag" of the video data of the content number 0. 6107 value "0X00". Then, the "VE_component(0)_pid" 6011 value "0X0096" and the "VE_component(0)_Bitrate" 6010 value "4Mbps" are read from the multiplexing information table 6001, and notified to the multiplexing unit 5112.

Next, the multiplexing control unit 5110 judges whether or not the content audio data of the directory number 1 has been multiplexed (S7620), and instructs the multiplexing unit 5112 how many audio data have been multiplexed, as in the case of the image data (S7620). road. In the case of multiplexing, the multiplexing of audio data is not performed.

The above processing is performed on all relevant directories. As a result, a multiplexing instruction is created in which the multiplexing start position is set to "0" for all the video data and all the audio data.

Fig. 32 shows a more detailed flow of the navigation information multi-direction creation process (S77-0, S77-1, ... S77-n) shown in Fig. 30 . In said figure, multiple indications are shown concerning the navigation information in the directories 0-n. Do the same for other directories as well. In addition, the variable Wp represents the multiplex start position of the C navigation information table where the transport stream start time is set to 0, in terms of time (seconds). The variable end represents the end time of the repeated multiplex of the navigation information table with 1 scheme number.

The multiplexing control unit 5110 initializes the plan number V and the value of the multiplexing start position pointer Wp to "0" (S7702). Then, referring to the storage area of the navigation information table generation unit 5111, it is checked whether there is a navigation information table with the directory number i and the plan number V having the file name "NVT(i, V)" (S7704). If there is no (NVT (i, V)", end the processing. Also, in the case of "NVT (i, v)", similarly, check whether there is a file name (NVT (i, V+1 )" (S7708).

When there is no NVT(i, V+1)", the multiplex control unit 5110 reads the effective end time "end_time" from the navigation information table of the file name "NVT(i, v) and sets it in the variable end T (S7710).

When "NVT(i, V+1) exists, the multiplex control unit 5110 makes the effective end time "end_time" of the navigation information table of the file name "NVT(i, v) and the file name "NVT(i, V+1) )" navigation information table effective start time "seart_time" value minus 1 value comparison, the smaller value is set in the variable endT (S7714). For example, in the case of i=0 and v=0, “NVT (0, 0)” shown in FIG. 17 and “NVT (0, 1)” shown in FIG. The "end_time" value "65" in "(0, 0)" is compared with the value "69" minus 1 second from the "start_time" value "70" in "NVT(0, 1)", and the smaller value " 65" is set in the variable end T. Therefore, the multiplexing time of "NVT(0,0)" should be between WP=0 and endT=65.

Next, the multi-path control unit 5110 uses the formula Wp=Wp+{S-NVT(i, v)/Bi} to find the multi-path end position Wp when "NVT(i, v)" is multi-pathed, and compares this with the variable The value of endT is compared (S7712). Here, S_NVT(i, v) is the size when "NVT(i, v)" is converted into transport stream packets according to the MPEG2 system standard. Bi is the bit rate assigned to the multi-way part of "NVT(i, v)", and the bit rate value assigned to the relevant directory is read by the multi-way information storage unit 5104 .

When the multipath end position Wp is larger than the variable end, the multipath control unit 5110 adds "1" to the plan number (S7716), and returns to S7704 for processing.

When the multiplexing end position is less than or equal to end, the multiplexing control unit 5110 creates a multiplexing instruction of “NVT(i, v)” and notifies the multiplexing unit 5112 of it. At this time, the multiplexing control unit 5110 notifies the multiplexing start position Wp value, bit rate Bi value, PID value, table_id value, table_id_extension value, and Version_no value as a multiplexing instruction.

At that time, the multiplexing control unit 5110 reads out the PID value assigned to the portion in which the navigation information table of the directory number i is multiplexed by the multiplexing information storage unit 5104 for the PID.

Regarding table_id, a value determined in use of the navigation information table (for example, "0X90") is set.

Regarding table_id_extension, the value of the category "NE_id" assigned to the category number i is read out in the category identifier allocation table.

Regarding Version_no, it is read from the plan number allocation table 6201 shown in FIG. 16 .

For example, in the case of "NVT(0,0)" shown in FIG. 17, the first multi-way instruction is Wp=0, PID=0X0092 (="NE_component(0)_pid"), Bi=Mbps, table_id=0X90, table_id_extension = 0x0000 (="Ne_id), Version_no = 0X00.

After notifying the multi-path instruction, the multi-path control unit 5110 uses the formula Wp=Wp+{S-NVT(i, v)/Bi} to update the value of the multi-path start position indicator (S7720), and returns to make the file name NVT(i, When the navigation information table of v) is multi-path, the processing after multi-path end position determination (S7712).

Receiving the multiplexing instruction notified by the above process, the multiplexing unit 5112 generates a multiplexing stream. And the transmitting unit 5106 multiplexes the multiplexed stream in the delivery stream and transmits it.

1-3 General configuration of receiving device 5121

In Fig. 4, receiving device 5121 is equipped with receiving unit 5122, TS (Transport Stream) decoder unit 5123, AV decoder unit 5124, received data storage unit 5125, receiving control unit 5126, signal receiving unit 5127, playback unit 5128 , the display unit 5129 , and the audio output unit 5130 are configured to interactively extract content from the transport stream transmitted from the digital broadcasting device 5101 according to user operations and play it back. The received data storage unit 5125 includes a navigation information table storage unit 5132 and a system information table storage unit 5133 .

1-3-1 Receiver 5122

The reception unit 5122 receives the transport stream specified by the reception control unit 5126 and outputs it to the TS decoding unit 5123 .

1-3-2TS decoder unit 5123

The TS decoder unit 5123 has a filter bar memory 5131 that stores filter conditions set by the reception control unit 5126, and separates video data and audio data from the transport stream output from the reception unit 5122 based on the filter conditions, and decodes them into AV output from the device unit 5124, and the separated navigation information table is written into the received data storage unit 5125. Also, system information such as PCR (reference clock information) is separated and output to the AV decoder unit 5124 .

The filter condition storage unit 5131 stores a plurality of filter conditions. Corresponding to a plurality of filter conditions, the TS decoder unit 5123 simultaneously performs a plurality of separation processes.

33A and 33B show examples of filter conditions stored in the filter condition storage unit 5131, respectively. In these figures, each row of filter condition tables 7801 and 7807 indicates one filter condition specified by filter identification number, PID, table_id_extension, version_no, and output terminal.

The "filter identification number" column 7802 is a number for identifying each filter condition. In the above figure, "0", "1", and "2" represent filter conditions for separating image data, audio data, and navigation information, respectively, and "3" and later, which are not shown in the figure, represent separating system information such as PMT. conditions of.

The "PID" column 7803 indicates the PID value of the data to be separated.

A "table_id_extension" column 7804 indicates a table_id_extension value of an identifier for separating navigation information and system information.

The "Version_no" column 7805 indicates the version number value used for separating the navigation information. When "-" is written in the "Version_no" column 7805, it indicates a setting condition, that is, if the value of the identifier "Version_no" is any value, it is separated.

In the "Output Port" column 7806, an output port for outputting the separated data is indicated.

For example, the image data separated under the filter condition of the filter condition identification number "0" shown in FIG. Cannot be set. That is, since "table_id_extension" and "Version_no" are not provided for the image data, no filter condition is formed. In the "PID" column 7803, the PID value "0X0096" of the image data to be separated is set. Accordingly, when the receiving unit 5122 receives the transport stream shown in FIG. 29 , the TS decoding unit 5123 separates the video data “Video0.m2v”, and outputs it to the AV decoder unit 5124 .

In addition, the audio data separated by the filter condition of filter identification number "1" shown in FIG. column 7805. That is, the same filter conditions as those for image data are not formed. In the "PID" column 7803, the PID value "0x0098" of the audio data to be separated is set by the reception control unit 5126 . When the receiving unit 5122 receives the transport stream shown in FIG. 29 , the TS decoder unit 5123 separates the audio data “Avdio0.m2a”, and outputs it to the AV decoder unit 5124 .

Similarly, the navigation information table storage unit 5132 is set in the "output destination" column 7806 for the navigation information table separated by the filter condition of the filter identification number "2". At this time, the TS decoder unit 5123 writes the separated navigation information table into the navigation information table storage unit 5132 . In the "PID" column 7803 and "table_id_extension" column 7804, the PID value "0X0092" and the table_id_extension value "0X0000" of the navigation information table to be separated by the reception control unit 5126 are set. Setting conditions are set in the "Version_no" column 7805 . With this, when the receiving section 5122 receives the transport stream shown in FIG. 29, the TS decoder section 5123 separates the navigation information tables "NVT(0,0)", "NVT(0,1)", " Any one of NVT (0, 2)", "NVT (0, 3)", and "NVT (0, 4)" is written in the navigation information table storage unit 5132, and at the same time, its content is notified to the reception control unit 5126.

The filter condition table 7801 in FIG. 33A indicates the filter conditions stored in the filter condition storage unit 5131 immediately after the user selects an event, and indicates the filter conditions entered into the list.

The same applies to the filter condition table 7807. However, in the filter condition table 7807, since the value "0X01" is set in "Version_no" of the navigation information filter condition, the TS decoder unit 5123 separates the transport stream shown in FIG. The navigation information table "NVT (0, 1)" is written in the navigation information table storage unit 5132, and its content is notified to the reception control unit 5126 at the same time. That is, the filter condition table 7807 shows the filter conditions after the entry directory is separated.

1-3-3AV decoder unit 5124

The AV decoder unit 5124 has a clock unit (not shown), and decodes while synchronizing the video data and audio data output from the TS decoder unit 5123 in accordance with the MPEG2 standard. The clock unit sets a reference time based on the PCR (reference clock information) value output from the TS decoder unit 5123, and calculates a reference time for decoding while accurately synchronizing image data and audio data.

1-3-4 Received data storage unit 5125

The received data storage unit 5125 is constituted by RAM, for example, and includes a navigation information table storage unit 5132, a system information table storage unit 5133, and the navigation information table storage unit 5132 stores the navigation information table separated from the transport stream by the TS decoder unit 5123. The system information table storage unit 5133 contains system information tables such as NIT, SDT, EIT, PAT, and PMT separated from the transport stream by the TS decoder unit 5123 . Note that the content of these navigation information tables and the content of the system information table are the same as those shown in FIGS. 17 to 27, so descriptions are omitted here.

1-3-5 Signal receiving unit 5127

The signal receiving unit 5127 receives the operation signal of the user's operation member, and outputs it to the reception control unit 5126 . For example, when receiving an event selection signal indicating a talk program in a transport stream transmitted from the digital broadcasting apparatus 5101 , the selection signal is output to the reception control unit 5126 . And, when receiving a determination signal based on a user operation described later, the signal is output to the reception control unit 5126 . In addition, the so-called operating member is the operation panel and remote control etc. arranged in the receiving device 5121, for example, there are "left", "right" and "confirm" keys, the user presses each key, and the remote control transmits the signal to the signal receiver. Section 5127. The operation of the "left" and "right" keys is used to switch the key selection state in the display image displayed in the display part 5129 to a right button image or a left button image, and the operation of the "OK" button is used to confirm its selection state.

1-3-6 playback unit 5128

The heavy wheel unit 5128 outputs the image data decoded by the AV decoding unit 5124 and the graphic information output from the receiving control unit 5126 to the display unit 5129 as an image signal in accordance with an instruction from the reception control unit 5126, The audio data decoded by the unit 5124 is output to the audio output unit 5130 . At this time, the graphics information is superimposed on the moving image data at the display position on the display image notified by the reception control unit 5126 .

1-3-7 Display part 5129

The display unit 5129 is realized by a TV monitor, and displays the image output from the playback unit 5128 .

1-3-8 Sound output unit 5130

The audio output unit 5130 is realized by a speaker, and outputs the audio output from the playback unit 5128 .

1-3-9 Reception Control Unit 5126

The reception control unit 5126 is composed of a CPU, an RDM for storing programs, a RAM for operation, etc., and is added to the overall control of the reception device 5121 to control reception of talk programs.

1-3-9-1 Reception Control Unit 5126: Overview of Talk Program Reception Processing

FIG. 36 is a flowchart showing the outline of the talk program reception process by the reception control unit 5126.

The receiving control unit 5126 controls the receiving unit 5122 and the TS decoder unit 5123 according to the program determined by the MPEG2 system standard and the DVB-SI standard when the receiving device 5121 is powered on and off, and writes each system information included in the transport stream into the system information table storage unit 5133. At this time, the program list, etc. can be displayed.

If the user selects the event corresponding to the dialogue program in the transport stream by remote control, the reception control unit 5126 receives the relevant selection signal through the signal receiving unit, and refers to the system information table in the system information table storage unit 5133 to obtain the event identifier and original_network_id , transport_stream_id, service_id, and event_id values (S8102).

The receiving control unit 5126 refers to the system information table in the system information table storage unit 5133, instructs the receiving unit 5122 to receive the transport stream transmitted by the transmitting unit 5106, and instructs the TS decoding unit 5123 to separate the PMT corresponding to the selected event. The receiving unit 5122 receives the transport stream transmitted by the transmitting unit 5106 and outputs it to the TS decoding unit 5123 . The TS decoder unit 5123 separates the PMT corresponding to the selected event, writes it into the system information table storage unit 5133 in the reception data storage unit 5125 , and notifies the reception control unit 5126 . When the reception control unit 5126 receives the notification of PMT reception through the TS decoder unit 5123, it refers to the PMT in the system information table storage unit 5133, obtains the PID of the PCR, and writes it into the filter condition storage unit 5131 (S8104).

The reception control unit 5126 sets each ..._id of the selected service/event in each variable Cur_..._id shown below, and clears the values of the variable Cur_VE_comp_tag, the variable Cur_AE_comp_tag, and the variable Cur_NE_id. These variables represent the information of the directory identifier to be reproduced now (S8106).

(Variable Cur_...id) ←(...id value of the selected event)

Variable Cur_original_network_id ← original_network_id value

Variable Cur_transport_stream_id ←transport_stream_id value

Variable Cur_VE_service_id ← Service_id value

Variable Cur_AE_Service_id ← Service_id value

Variable Cur_NE_Service_id ← Service_id value

Variable Cur_VE_event_id ← event_id value

Variable Cur_VE_event_id ← event_id value

Variable Cur_NE_event_id ← evnet_id value

Variable Cur-VE_comp_tag ←0 (clear)

Variable Cur_AE_comp_tag ←0 (clear)

Variable Cur_NE_id ←0 (clear)

Next, the reception control unit 5126 sets each ..._id value of the event selected in each variable new_...id shown below (S8108). At that time, the entry_VE_comp_tag and entry_AE_comp_tag and entry_NE_id values are read from the PMT stored in the system information table storage unit 5133 .

(variable new_...id) ←(...id value of the selected event)

Variable new_original_network_id ← original_network_id value

Variable new_transport_stream_id ←trans port_stream_id value

Variable new_VE_service_id ← service_id value

Variable new_AE_service_id ← service_id value

Variable new_NE_service_id ← service_id value

Variable new_VE-event_id ← event_id value

Variable new_AE_event_id ←event_id value

Variable new_NE_comp_tag ← event_id value

Variable new_VE_comp_tag ← entry_AE_comp_tag

Variable new_AE_comp_tag ← entry_AE_comp_tag

Variable new_NE_id ← entry_NE_id

Next, by repeating the directory switching process (S8110), clearing of the directory change flag indicating that directory switching is necessary (S8112), navigation information playback control processing (S8114), reception control unit 5126) implements dialogue program control.

1-3-9-2 Reception Control Unit 5126: Directory Switching Process

FIG. 37 is a flowchart showing in more detail the directory switching process (S8110) shown in FIG. 36 .

First, the reception control unit 5126 itself has the same values of new_original_network_id and Cur_original_network_id as stored variables, and determines whether the values of the variables new_transport_stream_id and Cur_transport_stream_id are the same (S8202). If they are the same, image data switching processing (S8210), audio data switching processing (S8212), and navigation information switching processing (S8214) are performed simultaneously, and the processing is terminated. Image data switching processing, audio data switching processing, and navigation information switching processing will be described in detail later.

When not identical, refer to the system information table according to the program determined by the MPEG2 system standard and the DVB-SI standard, and indicate to the receiving unit 5122 the reception of the transport stream identified by the variable new_original_network_id and the variable new_transport_stream (S8204), in the variable Cur_original_network_id设定变量new_original_nework_id值、在变量Cur_transport_stream_id中设定变量new_transport_stream_id值(S8206)，使变量Cur_VE_service_id、变量Cur_VE_evnet_id、变量Cur_VE_comp_tag、变量Cur_AE_service_id、变量Cur_AE_evenent_id、变量Cur_AE_comp_tag、变量Cur_NE_service_id、变量Cur_NE_enent_id、变量Cur_NE_id值清0( S8208), the image data switching processing (S8210), the audio data switching processing (S8212), and the navigation information switching processing (S8214) are simultaneously performed, and the processing is terminated.

1-3-9-3 Reception Control Unit 5126: Image Data Switching Process

Fig. 38 is a flowchart showing in more detail the image data switching process (S8210) shown in Fig. 37 .

The reception control unit 5126 itself stores the same values of the variables new_VE_service_id and Cur_VE_service, and determines whether the values of the variables new_VE_event_id and Cur_VE_event_id are the same (S8302). If they are the same, it is determined whether the values of the variables new_VE_comp_tag and Cur_VE_comp_tag are the same (S8304), if yes, the process ends, and if negative, go to S8310 in FIG. 38 . When the determination in S8302 is negative, the filter condition of the PMT of the event corresponding to the variables new_VE_service_id and new_VE_event_id is set in the filter condition storage unit 5131 . The TS decoder unit 5123 separates the requested PMT, stores it in the system information table storage unit 5133 , and notifies it to the reception control unit 5126 . When the reception control unit 5126 receives the PMT separation notification, it refers to the received PMT, obtains the PID of the PCR, and sets it in the filter condition storage unit 5131 (S8306).

The reception control unit 5126 sets the value of the variable new_VE_service_id in the variable, and sets the value of the variable new_VE_event_id in the variable Cur_VE_event_id (S8303). In S8310, the reception control unit 5126 refers to the PMT stored in the system information table storage unit 5133 corresponding to the event identified by the variables Cur_VE_service_id and Cur_VE_event_id, has a part tag equal to the value of the variable new_VE_comp_tag, and obtains the part where the transmitted data is image data the PID. This is then set in the filter condition of the image data in the filter condition storage unit 5131 .

The TS decoder unit 5123 separates the video data corresponding to the value of the variable new_VE_comp_tag from the transport stream according to the filter condition, and outputs it to the AV decoder unit 5124 . The AV decoder unit 5124 decodes the image data, and displays it on the display unit 5129 via the playback unit 5128 (S9312).

The reception control unit 5126 sets the value of the variable new_VE_comp_tag in the variable Cur_VE_comp_tag (S8314), and ends the process.

1-3-9-4 Reception Control Unit 5126: Voice Data Switching Process

FIG. 39 shows a flowchart showing the audio data switching process (S8212) shown in FIG. 37 in more detail.

The reception control unit 5126 itself stores the same values of the variables new_AE_service_id and Cur_AE_service_id, and determines whether the values of the variables new_VE_evnet_id and Cur_AE_event_id are the same (S8402). If yes, determine whether the values of the variables new_AE_comp_tag and Cur_AE_comp_tag are the same (S8404), if yes, terminate the process, and if no, move to S8410. When the determination in S8402 is negative, the filter condition of the PMT of the event corresponding to the variables new_AE_service_id and new_AE_event_id is set in the filter condition storage unit 5131 . The TS decoder unit 5123 separates the requested PMT, stores it in the system information table storage unit 5133, and notifies the reception control unit 5126 (S8406). The reception control unit 5126 sets the value of the variable new_AE_Service_id in the variable Cur_AE_id, sets the value of the variable new_AE_event_id in the variable Cur_AE_event_id (S8406), and the reception control unit 5126 refers to the storage unit stored in the system information table corresponding to the event identified by the variables Cur_AE_Service_id and Cur_AE_event_id. The PMT in 5133 has a part tag equal to the value of the variable new_AE_comp_tag, obtains the PID of the part where the transmitted data is audio data (S8410), and sets this in the filter condition of the audio data in the filter condition storage unit 5131.

The TS decoder unit 5123 separates the audio data corresponding to the value of the variable new_AE_comp_tag from the transport stream according to the filter condition, and outputs it to the AV decoder unit 5124 . The AV decoder unit 5124 decodes the audio data, and outputs it to the audio output unit 5130 via the playback unit 5128 (S8412). The reception control unit 5126 sets the value of the variable new_AE_comp_tag in the variable Cur_AE_comp_tag (S8414), and the process ends.

1-3-9-5 Reception Control Unit 5126: Navigation Information Switching Process

Fig. 40 is a flowchart showing in more detail the navigation information switching process (S8214) shown in Fig. 37 .

The reception control unit 5126 itself stores the same values of the variables new_NE_service_id and Cur_NE_service_id, and judges whether the values of the variables new_NE_event_id and Cur_NE_event_id are the same (S8502). If they are the same, it is determined whether the values of the variables new_NE_id and Cur_NE_id are the same (S8504), and if they are the same, the process is terminated. If not, move to S8510. When the determination in S8502 is negative, the filter condition of the PMT of the event corresponding to the variables new_NE_service_id and new_NE_event_id is set in the filter condition storage unit 5131 . The TS decoder unit 5123 separates the requested PMT, stores it in the system information table storage unit 5133, and notifies the reception control unit 5126 (S8506). The reception control unit 5126 sets the value of the variable new_NE_service_id in the variable Cur_NE_service_id, and sets the value of the variable new_NE_event_id in the variable Cur_NE_event_id (S8508). The reception control unit 5126 refers to the PMT stored in the system information table storage unit 5133, and the system information table storage unit acquires the partial PID of the transmission variable new_NE_id navigation information corresponding to the event identified by the variables Cur_NE_service_id and Cur_NE_event_id (S8510). Next, the reception control unit 5126 sets the PID value obtained in S8510 as "PID" in the filter condition of the navigation information in the filter condition storage unit 5131, and sets the variable new_NE-id value as "table_id_extension". "Version_no" is set to be unconditional. The TS decoder unit 5123 separates the navigation information table corresponding to the value of the variable new_NE_id from the transport stream according to the filter condition, stores it in the navigation information table storage unit 5132 , and notifies the reception control unit 5126 . That is, when the navigation information table is acquired for the first time, the navigation information table transmitted at that time is separately acquired only by the value of PID and table_id_extension regardless of the scheme bit information added to the navigation information table (S8512). The reception control unit 5126 sets the value of the variable new_NE_id in the variable Cur_NE (S8514), and terminates the process.

1-3-9-6 Reception Control Unit 5126: Dialogue Control Based on Navigation Information

Fig. 41 is a flowchart showing dialogue control processing based on navigation information.

The reception control unit 5126 waits for a notification to separate the navigation information table from the TS decoder unit 5123 (S8602), and determines whether there is a notification. If there is, go to S8606, if not, return to S8602 (S8604). The reception control unit 5126 reads out the plan number of the navigation information table stored in the navigation information table storage unit 5132, adds “1” to it, and sets it as “version_no” ( S8606). Then the reception control unit 5126 initializes the variable Cur_focus to "0". Then, the navigation information table stored in the navigation information table storage unit 5132 is read out, the object definition table and the bit mark table are referred to, and bit mark data and display coordinates displayed on the image are read out. At this time, for the key object whose target index value is equal to Cur_focus, the bit mark data corresponding to the bit mark index value shown in the "FocusedBittmap" column is read, and the key objects for other target index values corresponding to Bit flag data of the bit flag index value shown in the "Normal Bimap" column (S8610). Then, the "start_time" value of the effective timetable in the variable Start_time and the "end_time" value of the effective timetable in the variable end_time are respectively set (S8612).

The reception control unit 5126 refers to the clock unit of the AV decoder unit 5124, and sets the current time in the variable Cur_time (S8614). After that, the value of the variable start_time becomes equal to or greater than the value of the variable Cur_time (S8616), and the information of the bit mark data and the coordinate value read in S8610 is output to the playback unit 5128. The playback unit 5128 reselects the bit mark data output from the reception control unit 5126 at the designated coordinate position on the video data decoded by the AV decoder unit 5124, and displays it on the display unit 5129 (S8618).

Next, the reception control unit 5126 determines whether the value of the variable Cur_time is equal to or greater than the value of the variable end_time (S8622), and if so, removes the bit flag data being displayed on the playback unit 5128 (S8624), and returns to S8602. And, if it is negative in S8622, user input processing is performed. The details about user input will be described later (S8626).

Whether reception control part 5126 judges variable (ontentschangeflag) is 1 (S8626), if so, then makes the playback control process of navigation information end. If not, then judges whether there is the notification that obtains new navigation information table from TS decoder part 5123 (S8630). If so, instruct to cancel the displayed bit mark data in the playback unit 5128 (S8632), and return to S8606. Also, in S8630, when it is judged that there is no notification, then return to S8622.

1-3-9-7 Reception control unit 5126: User I/F processing based on navigation information

Fig. 42 is a flowchart showing user I/F (Inter Face) processing based on navigation information.

The reception control unit 5126 judges whether the user input received from the signal reception unit 5127 is a "right" key (S8702). If not, go to S8708, if yes, add 1 to the value of the variable Cur_focus. In addition, when the value of the variable Cur_focus is equal to the maximum value of the target index value in the navigation information table in the navigation information table storage unit 5132, it remains unchanged (S8704), and moves to S8706. The reception control unit 5126 refers to the object definition table and the bit flag in the navigation information table stored in the navigation information table storage unit 5132 in the navigation information table storage unit 5132, reads the bit flag data displayed on the screen and the coordinate value of the display position, and writes the output from the output unit 5128. At this time, for the key object whose target index value is equal to Cur_focus, read the bit mark data corresponding to the bit mark index value displayed in the "Focused Bitmap" column, and read the corresponding Bitmark data at the bitmark index value shown in the "NormalBitmap" column. The playback unit 5128 superimposes the bit mark data at the designated position on the image data decoded by the AV decoder unit 5124, displays it on the display unit 5129, and terminates the user input process (S8706).

Then, in S8708, the reception control unit 5126 judges whether the user input received by the signal receiving unit 5127 is a "left" key (S8708), if not, then moves to S8712, and when it is a "left" key, the variable The value of Cur_focus is reduced by 1. Also, when the value of the variable Cur_focus is "0", the status quo is maintained (S8710), and the process moves to S8706.

Next, the reception control unit 5126 judges whether the user input received by the signal receiving unit 5127 is “determined” (S8708). If it is “determined”, the process moves to S8714, otherwise, the user input is terminated.

In S8714, the reception control unit 5126 refers to the object definition table in the navigation information table stored in the navigation information table storage unit 5132, obtains the processor index value of the key object whose object index value is equal to the variable Cur_focus value, refers to the processor definition table, and passes The processor read-in script corresponding to the processor index value. Judging whether it is "goto_contents" (S8716), if not, then move to S8724, if so, then read in the high link index value of the index number (S8718).

The reception control unit 5126 refers to the high-connection table of the navigation information table, and assigns original_network_id, transport_stream_id, VE_service_id, VE_event_id, VE_comp_tag, AE_service_id, AE_event_id, AE_comp_tag, NE_service_id, NE_event_id of the directory identifier corresponding to the high-connection index value read in S8718 , NE_id values are respectively set in the variables new_original_network_id, new_transport_stream_id, new_VE_service_id, new_VE_erent_id, new_VE_comp_tag, new_AE_service_id, new_AE_event_id, new_AE_comp_tag, new_NE_service_id, new_NE_event_id, new_NE_id.

However, if a set value is set in the high connection table, that is, an identifier related to "-", the original value of each variable is not changed (S8720). The reception control unit 5126 sets the value of the variable ContentsChageflag to "1" (S8722), and terminates the user input process.

In S8724, the reception control unit 5126 judges whether it is originally "goto_entry" (S8724), if not, then terminates the user I/F processing, and if so, refers to the system table storage unit 5133 corresponding to the event identified by the variables Cur_NE_service_id and Cur_NE_erent_id In the PMT stored in , set the values of "entry_VE_comp_tag", "entry_AE_comp_tag", and "entry_NE_id" to the variable new_VE_comp_tag, variable new_AE_comp_tag, and variable new_NE_id respectively, set the variable Cur_NE_service_id to the variable new_VE_service_id, variable new_AE_service_id, and set the variable new_NE_event_id to the value Set to variable new_AE_erent_id, variable new_AE_event_AE_event_id (S8726), and move to S8722.

1-3-10 Operation of receiving device 5121

Regarding the receiving device 5121 of the present invention constituted as above, its work is divided into 1. dialogue program selection receiving work, 2. display work based on navigation information, 3. user I/F processing based on navigation information, and 4. directory switching. Processing is explained separately.

1-3-10-1.1 Selection and reception of dialogue programs

When the receiving device 5121 is powered on, various system information tables included in the transport stream are received and written into the system information table storage unit 5133 .

When the user selects a dialogue program, that is, an event that is multiplexed in the transport stream shown in FIG. Information on transport elements such as identifying the original_network_id, the transport stream frequency of the transport_stream_id identified by "0X0001", instructs the receiving unit 5122 to receive the transport stream.

Furthermore, the reception control unit 5126 acquires the PID “0X0090” of the PMT of the program whose “Program_no” of the dialogue program is equal to “0X0002” of the service_id value from the PAT (refer to FIG. 23 ), and sets this in the filter condition storage unit 5131. The filter condition of the PMT. As a result, the PMT 7001 shown in FIG. 24 is separated by the TS decoder unit 5123 and written in the system information table storage unit 5133 .

The reception control unit 5126 reads the PCR PID “0X0091” from the PMT 7001 stored in the system information table storage unit 5133, and sets it as the PCR filter condition in the filter condition storage unit 5131.

Furthermore, the reception control unit 5126 reads out the entry list image data, audio data, and navigation information name identifier, and sets them as filter conditions in the filter condition storage unit 5131 .

In further detail, the reception control unit 5126 refers to the Entry_Descriptor 7003 shown in FIG. 22 in the PMT 7001, reads the "entry_VE_comp_tag" value "0X00", provides the stream_identifier_descriptor with the "component_tag" value "0X00", and reads The type of data to be transferred is the partial PID value “0X0096” of the image data, which is set as the “PID” of the filter condition of the image data in the filter condition storage unit 5131 .

Similarly, the reception control unit 5126 reads the "entry_AE_comp_tag" value "0X00", provides the stream_identifier_descriptor with the "component_tag" value "0X00", and reads the PID value "0X0098" of the audio data as the type of data to be transmitted, and sets it as a filter "PID" of the filter condition of the audio data stored in the condition storage unit 5131 .

And similarly, the reception control unit 5126 reads the “entry_NE_id” value “0X0000” and sets it as the filter condition “table_id_extention” of the navigation information table in the filter condition storage unit 5131 . In addition, the reception control unit 5126 refers to the table 7004 of the PMT 7001, reads out the partial PID value "0X0092" of the "NE_coanpoment_Desariptor(0)" 7201 that provides "0X0000" included between the "min_NE_id" value and the "max_NE_id" value, and sets into the navigation information table filter condition "PID". Also, the filter condition "Version_no" is set to be unconditional. In this case, the filter condition table held by the filter condition storage unit 5131 becomes the filter condition table 7801 shown in FIG. 33A.

As a result, the video data "Video0.m2v" and the audio data "Audio0, m2a" in the transport stream are separated by the TS decoder unit 5123 and output to the AV decoder unit 5124 . And, when the filter condition "Version_no" is unconditional, the navigation information tables "NVT(0,0)", "NVT(0,1)", "NVT(0,2)", "NVT(0, 3)" and "NVT(0,4)" are written in the navigation information table storage unit 5132.

Then, the reception control unit 5126 reads the separated navigation information table from the navigation information table storage unit 5132, and writes a value obtained by adding “1” to the plan number assigned to the separated navigation information table in the navigation information table in the filter condition storage unit 5131. The filter condition "Version_no" of the information table. However, adding 1 to the scheme number value returns "0" when the maximum value is overquoted.

For example, when the TS decoder unit 5123 separates the navigation information table 6301 of the file name “NVT(0,0” shown in FIG. 17 from the filter condition table 7801 shown in FIG. When separating the notification of the navigation information table, the navigation information table 6301 is read from the navigation information table storage part 5132, and "1" is added to the value of the program number "0", and "0X01" is set in the filter condition storage part 5131 "Version_no" of the filter condition of the navigation information. At this time, the filter condition table in the filter condition storage unit 5131 should be the filter condition table shown in FIG. 33B.

In this way, since the TS decoder 5123 separates only the navigation information having the next plan number of the navigation information table currently being reproduced, it is not necessary to check whether the content has changed every time the reception control unit 5126 receives new navigation information, thereby reducing the burden on the user. burdened.

1-3-10-2 2. Display work generated by navigation information

Based on the navigation information table separated as described above, the reception control section 5126 controls the display of objects (keys and images) included therein as follows. Here, the navigation information "NVT(0,0)" shown in FIG. 17 is separated.

According to the separated navigation information, the reception control unit 5126 initializes the variable Cur_focus to "0", refers to the target definition table 6302 and the bit flag table 6305 of NVT (0, 0) shown in FIG. The X coordinate value "20" and the Y coordinate value "400" displayed on the "0" column and the bit mark data of the bit mark index value "1" displayed on the "Focused Bitmap" column, and then read out the corresponding target index value The bit mark data of the X coordinate value "200" and the Y coordinate value "400" displayed in the "1" column and the bit mark index value "2" in the "Normal Bitmap" column.

Thereafter, when the current time becomes the "staRT_time" value "5" of the effective time table 6306, the reception control unit 5126 outputs the bit mark data and the coordinate value being read to the playback unit 5128.

On the other hand, the moving image 5201 ("Video0, m2V") and audio data 5203 ("Audio0, m2a") separated by the TS decoder part 5123 are decoded by the AV decoder part 5124, and sent to the playback part 5128 output.

The playback unit 5128 outputs an image signal in which the bit flag output from the reception control unit 5126 is superimposed on the image data 5201 output from the AV decoder 5124 .

A display image in this case is shown in FIG. 34A. The map display image 7901 corresponds to the scene 01b shown in FIG. 5, and shows the "Details of Osaka" key and the "See Kanto" key indicated by bit marks on the moving image. Among them, the "Osaka details" button becomes the display of the selected state according to the variable Cur_focus.

This display state continues up to the "end_time" value "65" shown in the effective time table 6306 in NVT(0,0), or up to directory switching according to user operations. When the current time becomes the value of "end_time", the display operation is performed in the same manner as described above at the moment when the start time of the next scenario NVT(0, 1) becomes.

1-3-10-3.3. User I/F processing of navigation information formation

It is now set to display the scene 01b shown in FIG. 5, that is, the display image in FIG. 34A.

Once the receiving control unit 5126 receives the signal operated by the user through the signal receiving unit 5127, when the signal operated by the user is the “right” key, the value of the variable Cur_focus is updated to “1”, referring to the navigation information storage unit 5132, Read the bit mark data corresponding to the bit mark index value "3" shown in the "Focused Bitmap" column of the target index value "1" key target of NVT(0,0) shown in Figure 17, and the X coordinate "200" and the Y coordinate "400" are simultaneously output to the playback unit 5128 . Regarding the key object whose object index value does not match the variable Cur_focus value "1", the bit flag data is obtained from the "NormalBitmap" field, and is similarly output to the playback unit 5128 .

With this, the "Details of Osaka" key 02b shown in FIG. 34A becomes unselected, and the "See Kanto" key 03b becomes selected.

Furthermore, when the signal operated by the user is the "Left" key, the value of the variable Cur_focus is updated to "0", returning to the display state of FIG. 34A again.

Moreover, when the user operates the "OK" key, the reception control unit 5126 refers to the navigation information storage unit 5132, and passes the target index value of NVT (0, 0) shown in FIG. 17 equal to the key target of Cur_focus "0". The processor reads the original. At this time, since it is originally "goto_contents(Hyperlink-Index 0)", various identifiers of the directory corresponding to the link terminal with a high link index value lower than the index are read, and the directory switching process is performed as follows.

1-3-10-4.4. Directory switching processing

As described above, in the state of displaying the display image in FIG. 34A , when the user operates the OK key, that is, when the scene 01b of the list 0 in FIG. 5 is switched to the scene 11b of the list 1, it will be described.

In this case, various identifiers of the list corresponding to the connection end of the high connection index value "0" in NVT(0,0) are read as described above.

Among various identifiers, all identifiers other than "NE_id" are "-", so the identifier of the transport stream to which the content of the connection terminal belongs, and the services to which the content of the connection terminal belongs, such as image data, audio data, and navigation information The identifier, the event identifier, the connected-side content image data identifier, and the audio data identifier each represent an identifier equivalent to the currently reproduced content identifier. That is, the image data and audio data of the content on the connection side are the same as those currently being reproduced, and only the navigation information is different.

The reception control unit 5126 reads out the navigation information identifier “NE_id” value “0X0001” and sets it as the filter condition “table_id_extension” of the navigation information table in the filter condition storage unit 5131 .

Next, the reception control unit 5126 refers to the table 7004 of the PMT 7001 in the system information table storage unit 5133, and reads out the PID value that provides the part of the "NE_component_Descriptor(1)" 7201 included between the "min_NE_id" value and the "max_NE_id" value. "0X0093" is similarly set as the filter condition "PID" of the navigation information table. Also, "Version_no" of the navigation information filtering condition is set to be unconditional.

Based on the set filter conditions, TS decoder unit 5123 separates "NVT (1,0)" shown in FIG. 18, stores it in navigation information table storage unit 5132, and notifies reception control unit 5126 of the result.

The reception control unit 5126 sets a value obtained by adding "1" to the plan number "0" provided to the separated NVT(1,0) in the filter condition "Version_no" column, thereby preparing for the case of revising the navigation information.

Furthermore, based on "NVT (1, 0)" stored in the navigation information storage unit 5132, the above-mentioned display operation of 1 and user I/F processing of 3 are performed. The playback display screen is displayed based on "NVT(1,0)" shown in FIG. 34B. In FIG. 34A, although the video data and audio data are the same, the key and character information are different because the navigation information is different.

In addition, when the user inputs the "OK" key with a remote control or the like in the state where the display portion 5129 displays the display image 7903 shown in FIG. The description will be given in the case of scene 11e of 1.

In this case, the reception control unit 5126 sets “0X0093”, “0X0001” and no condition to the filter conditions “PID”, “table_id_extension”, and “Version_no” of the filter condition storage unit 5131 , respectively. Thus, "NVT (1, 1)" shown in FIG. 20 is separated from the transport stream shown in FIG. 29 by the TS decoder unit 5123 and stored in the navigation information table storage unit 5132 . The reception control unit 5126 performs the above-mentioned display operation of 1 and user I/F processing of 3 based on "NVT (1, 1)". As a result, display image 7904 shown in FIG. 34D is displayed.

Next, in the case where the display portion 5129 displays the display image 8001 of FIG. 35A and the user inputs the "OK" key with the remote controller, that is, switching from the scene 01a of the list 0 in FIG. 5 to the scene 21a of the list 2 case, explain.

The reception control unit 5126 refers to the object definition table 6302 and the processor definition table 6303 of the navigation information table 6301 in the navigation information table storage unit 5132, and reads out the original "goto_contents" and its index value "1".

The reception control unit 5126 reads out the directory identifier of the connection end corresponding to the index value "1" from the high connection table 6304 . The reception control unit 5126 judges that the transport stream identifier to which the connection destination directory belongs, and the service identifier and event identifier to which the image data, audio data, and navigation information of the connection destination directory belong are equal, and does not perform PMT acquisition processing. Furthermore, since the identifiers of image data, audio data, and navigation information are different, these receptions are naturally switched.

The reception control unit 5126 reads out the image data identifier "VE_comp_tag" value "0X01", refers to the PMT7001 table 7004 in the system information table storage unit 5133, provides the Stream_identifier_descriptor whose "component)tag" value is "0X01", and reads the transmitted The PID value "0X0097" of the portion whose data type is image data is set as "PID" of the image data filter condition in the filter condition storage unit 5131 .

Then, the reception control unit 5126 reads out the audio data identifier "AE_comp_tag" value "0X01", refers to the table 7004 of the PMT7001 in the system information table storage unit 5133, provides the Stream_identifier_descriptor with the "component_tag" value "0X01", and reads the stream 2 The data type is the partial PID value "0X0099" of the voice data, which is set as the filter condition "PID" of the voice data in the filter condition storage unit 5131.

The receiving control section 5126 reads out the voice data identifier "NE_id" value "0X0002", sets it as the "table_id_extersion" of the filter condition of the navigation information table in the filter condition storage section 5131, and refers to PMT7001 to 7004 at the same time, reads the value provided in "min_NE_id The PID value "0X0094" of the part of "NE_component_Descriptor(2)" 7203 including "0X0002" between the "value and the "max_NE_id" value is also set as the "PID" of the filter condition of the navigation information table. Then, the filter condition "version_no" of the navigation information table is set to be unconditional.

The TS decoder unit 5123 separates the navigation information table 6701 of the file name "NVT(2,0)" shown in FIG. 21 from the transport stream shown in FIG. Section 5126 informs its purpose. Therefore, the display image 8002 in FIG. 35B is simultaneously displayed on the display unit 5129 .

1-3-11 Make full use of the original directory composition example

In the interactive program shown in FIG. 5, contents 0 to 3 each have one navigation information table. In other words, there is a one-to-one correspondence between the navigation information table and the directory. Here, an example of a directory structure in which a navigation information table and a directory are 1-to-1 and a directory structure example in which there is a one-to-one correspondence will be described by making full use of the script.

FIG. 43 shows an example of another talk program composed of four categories 10-13.

Presentation information as constituent elements of the lists 10 to 13 is defined as video data "Video1.m2v" and audio data "Audio1.m2a" shown in FIGS. 6A and 6B , respectively. That is, the video data "Video1.m2v" and the audio data "Vudio1.m2a" are contained in four directories.

The navigation information, which is the constituent elements of the lists 10 to 13, has the following two types of data structures.

As the first data structure, FIGS. 44 to 47 show navigation information in a case where navigation information and content are 1:1.

The navigation information "Navilo-1.nif" of FIG. 44 corresponds to each scene in the list 10 shown in FIG. 43 . The keys of "North", "Central" and "South" in each scene of the directory 10 are respectively represented by the key objects of the object index values 0, 1, and 2 of the "Navilo-1.nif":object definition table. There are also "north", "central", and "south" keys connected to directories 11, 12, and 13 to be displayed in the processor definition table and high connection table.

The navigation information "Navi11-1.nif" of FIG. 45 corresponds to each scene in the list 11 shown in FIG. 43 . The character information (northern weather information) in each scene of the list 11 is represented by an image object with an object index value of 1 in the object definition table. The "return" key represented by the target index value 0 key target, connects to the directory 10.

The navigation information "Navi12-1.nif" of FIG. 46 is the same as the navigation information "Navi13-1.nif" of FIG. 47 .

In the first data structure, the content is represented by using data structures such as the four navigation information "Navi10-1.nif", "Navi11-1.nif", "Nari12-1.nif", and "Navi13-1.nif". The keys 10-13, the text information and the directory are connected to each other.

As the second data configuration, Fig. 48 shows the navigation information in the case of a pair of navigation information and a content.

The navigation information "Navilo-13-1.nif" in FIG. 48 corresponds to each scene in the four categories 10-13 shown in FIG. 43, and represents all the objects indicated by the four navigation information shown in FIG.

In the figure object definition table, the seven objects with object index values 0 to 6 include key objects and all image objects shown in FIGS. 44 to 47, and a column "visibility" is newly added.

The "visibility" column in the object definition table enables the user to check or not to check the object when switching to the directory 10 from another directory at first, that is to say, indicates whether it is valid or not. The effective object indicates a bit flag displaying a key, character information, etc., and a processing program (original) is executed when a user operates a determination key. An invalid target is not represented, and its handlers ignore it.

Therefore, according to the object definition table, when the directory is initially played back, only objects with object index values 0 to 2 are valid, thereby representing the "North" and "Central" shown in the bit flag index values 0 to 5. ", "South" key [focus (fo-kasu) with 1, standard (1-21V) with 2]. As a result, the directory 10 shown in FIG. 43 is played back.

Also, the original in the processor definition table indicates a program that executes four directory switches. This is basically a simple combination of the command "hide-object)" to delete the object (make invalid) and the command "show-ooject" to show the object (make valid).

For example, when the "North" key in the directory 10 is selected and determined by the user, the processor (processor index value 0) of the target (index value 0) of the "North" key is started. According to the original of this processor, key objects with target index values 0, 1, 2, that is to say "North", "Central", and "South" keys are invalidated, and image objects with target index value 4, that is, " Northern Text Information" is valid.

As a result, the directory 10 shown in FIG. 43 is switched to the directory 11, and this is indicated.

The same applies to the case where the "Central" or "South" key is selected and determined by the user during playback of the content 10 .

Also, for example, in the playback of directory 11, 12 or 13, in the case of selecting and confirming the key of "return", make the processor (processor index value 3) of the "return" key target (target index value 3) start up. According to this script, the three key objects (object index values 0 to 2), that is, the "North", "Central" and "South" keys are enabled, and the other objects (image objects 4 to 6) are disabled. As a result, the display in the list 10 shown in FIG. 43 is switched.

In this way, while recording a plurality of targets in the one-year navigation information, it is possible to program a combination of (effective) targets to be originally displayed. That is, a plurality of categories can be represented by one piece of navigation information. At this time, the receiving device 5121 does not need to receive the navigation information again every time the directory is switched, so the response speed to the user operation is fast.

1-3-12 Other

In addition, in the above-described embodiment, as shown in the multiplex information table 6001 of FIG. Directory is set to a different value. For example, even if a directory that is frequently referenced due to user operations, such as a directory having tasks as a main menu, can be assumed, the bit rate can be increased. In the dialogue program shown in FIG. 5, the bit rates for categories 0 and 1 may be set higher than those for categories 2 and 3.

Also, the bit rate can be changed dynamically over the playback time of the directory. For example, regarding a directory whose temporal reference frequency is expected to increase or decrease, the bit rate may be dynamically changed every time the scheme changes.

In this case, it is only necessary to dynamically change the bit rate of the multipath information table 6001. Since each multiplexing instruction notified from the multiplexing control unit 5110 to the multiplexing unit 5112 thus includes the bit rate value of the multiplexing information table 6001, the multiplexing frequency of the navigation information also changes dynamically.

If, in the case of assigning a certain bit rate to all navigation information (a case of assigning one PID to all navigation information), the multi-way information table 6001 calculates the number of creation times of the multi-way indication of the navigation information table, for example, as long as the content is adjusted to 0-3 The ratio of NVT multi-way instructions is 2:1:1:1.

Furthermore, in the above-mentioned embodiment, it is assumed that the moving image data is the size of the display image of the receiving device 5121, but moving image data having a smaller size than that may be set. For example, if the size of moving picture data is 1/4, the bit rate can also be 1/4. Therefore, even if the upper limit of the bit rate that can be assigned to a talk program is limited, the number of directories can be increased. In this case, the playback image can also be obtained in combination with the target display generated based on the navigation information. In addition, 2 to 4 moving image data of 1/4 size may be contained in one directory at the same time.

Furthermore, in the above-mentioned embodiment, although the dialogue program is broadcast by digital satellite, it may also be broadcast by, for example, a cable television (CATV) broadcasting station.

In this embodiment, each navigation information table includes an effective time table for setting the relative time at which the event broadcast start time of the application multiplexing stored in the transmission data storage unit 5102 is "0". (unit: second), define the effective start time "start_time" when the navigation information becomes effective, and the effective end time "end_time" when the navigation information becomes invalid. The reception control unit 5126 of the reception control unit 5121 makes the multiplex unit 5112 of the digital broadcasting unit 5101 set the initial value of the header of the transport stream to “0” to synchronize with the PCR information multiplexed in the transport stream, and refers to the calculation time. The clock unit of the AV decoder unit 5124 judges the valid start time and valid end time of each piece of navigation information, but for example, the receiver 5121 also includes a clock unit for measuring absolute time. The reception control unit 5126 may also be configured to refer to the clock unit to obtain the current absolute time, and then read the event start time (absolute time) from the event information stored in the EIT in the system information table generation unit 5105, and obtain the absolute time from the current absolute time. Subtract the event start time from the time to find the relative time when the broadcast start time of the event is set to "0", and use this to formulate the effective start time and effective end time of each navigation information.

And in the effective time table, "Start_time" and "end_time" are stipulated to be recorded with absolute time, and the reception control section 5126 will be provided with a clock section for measuring the absolute time, and the reception control section 5126 can certainly be made as a clock section for comparing and measuring the absolute time. , to determine the effective start time and effective end time of each navigation information.

In addition, when there is no requirement for accuracy in the management of the effective time of each navigation information, the reception control unit 5126 of the receiving device 5121 can also be configured not to judge the effective start time and effective end time of each navigation information, and to receive the translation from the TS. When the encoder unit 5123 separates the notification of the new navigation information table, it specifies that the currently reproduced navigation information table is invalid and the newly separated navigation information table is valid.

In addition, in this embodiment, the technical solution stipulates that although the display information storage unit 5107 of the digital broadcasting device 5101 stores all broadcast image data and audio data in advance, it may also be equipped with a TV camera and a real-time compression station, for example. An encoder for the image captured by the TV camera, and the output of the encoder is stored in the display information storage unit 5107 in real time.

Embodiment form 2

Principle of the invention

In this embodiment, a description will be given of a digital broadcasting apparatus that realizes a dialogue program composed of page-based content.

Before explaining the structure of the digital broadcasting system of the present invention, the principle of realizing the dialogue program composed of its page-based content will be described first with reference to Figs. 49-51.

Fig. 49 is a diagram showing weather forecasts in an example of the respective contents displayed on the display screen on the receiving side. Wherein, a plurality of catalogs 151, 152, ... 153, ... are used to represent weather forecasts of the whole country and various places. Here, the so-called directory refers to the information unit of the interactive operation of the user. These plural categories 151, 152, . . . 153, .

Now, when the list 153 showing the national weather forecast is shown on the display screen, once the user selects and decides to operate the key 160 called "Tokyo", then as shown by the arrow 154, the display screen is switched from the list 153 to displaying Tokyo weather. Catalog of forecasts 151 . Then, when the user decides to operate the “return” key 158 , the display screen is switched from the list 151 to the original list 153 as indicated by the arrow 155 .

Similarly, when the user selects and operates the key 161 indicating the display screen “Osaka” of the list 153 , the display screen is switched from the list 153 to the display of the list 152 as indicated by an arrow 156 . Furthermore, in this state, once the user decides to operate the “return” key 159 , the display screen returns to the list 153 state as indicated by the arrow 157 . The directory 151, . . . has keys 158, 159, 160, 161 due to the display switching operation as above. In addition to these keys, each list may have a key for switching to the flow rate list of the first embodiment.

By the user display switching operation described above, the user can freely switch the list display, so each list is transmitted as follows on the transmission side.

Fig. 50 is a diagram schematically showing transmission data transmitted from the transmission side. The transmission data 165 is composed of data (information) representing a plurality of contents, and transmission is repeated for all of them. The transmit data 165 is composed of navigation information 169, 170, ..., 171, ... corresponding to a plurality of image data 165, 167, ... 168, ..., respectively.

Each screen data 166, ... is the data used as the main screen of each content 151, ... displayed on the display screen upon reception, and in this description, a weather forecast image is displayed.

Each navigation information 169, . . . includes: the bit mark (Bitmap) data 172, 173, 174 of the key 158, . Describe the original (Script) information 175, 176, 177 of the user's operation action; and represent the high connection (Hyperlink) information 178, 179, 180 of the connection end directory that can be used for the directory display switching generated by the user operation.

The list 151 shown in FIG. 49 is represented by image data 166 and navigation information 169 . Similarly, the directory 152 is represented by image data 167 and navigation information 170, and the directory 157 is represented by image data 168 and navigation information. That is, each piece of image data 166 , . . . and each piece of navigation information 169 are set in a corresponding relationship.

FIG. 51 is a diagram schematically showing a transmission status of transmission data 165 transmitted from the transmission side. The transmit data 165 is repeatedly transmitted on the transmitting side. It can be understood as time-repeated transmission of transmission data 165 .

However, in this figure, although the image data and navigation information are represented by a frame structure, they are actually digitized, and the image data and corresponding navigation information are multiplexed. Since the transmission data 165 is transmitted as an MPEG2 transport stream, it should be Note that the specific launch data is different from this figure.

In addition, although not shown in the figure, each transmitted image data 166, 167, . . . , 168, . Similarly, identification information is added to each navigation information 169 , 170 , .

On the other hand, the receiving side monitors the identification information in the transmission data 165, acquires image data including desired identification information and navigation information as a list, and displays it as list 151, for example, as shown in FIG. 49 .

In addition, the acquired navigation information 171, for example, is stored in the user's predetermined operation.

An example of a digital broadcasting system according to this embodiment of the present invention will be described below with reference to the accompanying drawings based on the above principles.

Example 1

2-1. Outline of Digital Broadcasting System (page base)

Fig. 52 is a structural diagram of Embodiment 1 of the digital broadcasting system of the digital broadcasting system according to Embodiment 2 of the present invention. The digital broadcasting system is composed of a data transmitting device 101 and a plurality of data receiving devices 121 .

The structure of the data transmission device 101 is to make multiple and repeated transmission of a plurality of base page directory data that are mutually highly connected and extended in the MPEG2 transport stream, and is equipped with a transmission data storage unit 102, a data multiplexing unit 103, and multiple information A storage unit 104, a system information table generating unit 105, and a transmitting unit 106.

The data receiving device 121 is configured to be capable of replaying the content from the MPEG2 transport stream transmitted by the data transmitting device 101 according to the interactive nature of the user's operation. It is equipped with a receiving unit 122, a TS decoder unit 123, an AV decoder unit 124 , the received data storage unit 125 is connected to form a control unit 126 , a signal receiving unit 127 , a playback unit 128 , a display unit 129 , and a sound output unit 130 .

2-2. Data transmitter 101

2-2-1. Configuration of transmission data storage unit 102

The transmission data storage unit 102 is composed of a recording medium such as a disk, and stores a plurality of catalog data and structural information constituting an interactive program, including a display information storage unit 107 , a navigation information storage unit 108 , and a structural information storage unit 109 . Also, a state in which a dialog program is included as transmission data in an MPEG2 transport stream is called "event" or "program".

The emission data storage unit 102 stores the emission data 165 shown in FIG. 50 as follows, divided into image data (presentation information) and navigation information. In addition, the corresponding relationship between image data and navigation information is stored as structural information.

2-2-1-1. Display information storage unit 107

The presentation information storage unit 107 stores content information such as image data and audio data included in each content. 53A and 53B show still image data as an example of presentation information of the catalogs 153 and 151, respectively. FIG. 53A shows still image data 201 represented by the file name "Still5.m2v", and Fig. 53B shows still image data 202 represented by the file name "Still.m2v". The still image data 201, 202 are respectively stored in the form of digital encoding according to the ISO/IEC 13818-2 (MPEG2 video) standard. In addition, the encoding format of the image data may also be other formats.

2-2-1-2. Navigation information storage unit 108

The navigation information storage unit 108 stores navigation information included in each directory. The navigation information includes hyperlink information indicating a link to another directory, and describes a destination for the user to interactively select the link destination. Fig. 54 is a diagram showing an example of navigation information. Among them, the navigation information 301 is an example of the navigation information of the directory 153, and is stored with the file name "navi5 nif".

In addition, the still image data 201 shown in FIG. 53A and the navigation information 301 shown in FIG. 54 form a list 153 and are displayed in the configuration information table 501 shown in FIG. 56 described later.

The navigation information 301 includes an object definition table (Object Definition Table) 302, a handler definition table (Handler Definition Table) 303, a hyperlink table (Hyper link Table) 304, and a bit flag table (Bitmap Table) 305 expressed in table form. This navigation information 301 differs from the navigation information 5301 shown in FIG. 7 in that an effective time table is provided, but other than that, it is substantially the same, and thus description thereof will be omitted. In addition, in FIG. 54, each column of "object index", "handler index", "hyperlink index", and "bit flag index" is simply omitted as "index".

The object definition table 302 indicates information such as the type (type) and attribute of a graphic object displayed on the display screen such as a button (Bulton) for each index number. The index number is described in the "Index" column. The "Type" column records the type of the graphic object. In the "X" and "Y" columns, the X and Y coordinate values of the display reference position on the display screen are described, respectively. In the "handler" column, the index number of the handler executed when the object indicated by the index number by the user in the data receiving device 121 is selected is described. In the column of "normal bitmap (NormalBitmap)", the bitmap index number indicating each object in the normal state is described. On the other hand, in the column of "Focused Bitmap (Focused Bitmap)", the bitmap index number of each object displayed in the selected state is described. Among them, the state that only represents the target is called the standard state; the state that can choose to express the target is called the selected state.

For example, in the target definition table 302 index number "0" row, the type is "key", the coordinate value of the upper left end represents the position is X=400, Y=300, when using the data receiving device 121 to select, execute the index number " 2” handler. Objects using bit flags with index numbers "6" and "7" are represented in the standard state and the selected state, respectively. The same goes for the row with index number "1".

The processing program definition table 303 shows a script describing the operation of the data receiving device 121 operated by the user for each index number.

For example, a script called "got_contenls (index4)" is described on the row of index "2" of the processing program table 303 . This script indicates switching to the directory indicated by the index number "4" high link. In addition, it is also possible to describe, for example, an utterance instruction according to the original text.

The high link table 304 shows the high link to the content of the content (Contents) number specified for each index number.

For example, the index number "4" of the high connection table 304 indicates a high connection to the directory with the directory number "1".

The bitmap table 305 indicates the bitmap data (Bitmap Data) representing graphic information superimposed on the image data of the presentation information in the data receiving device 121 every time an index number displayed as data in the object definition table 302.

For example, in the index number "6", the "standard bit flag" bit flag data of the "key" of the index number "0" of the object definition table 302 is presented.

Fig. 55 shows navigation information 401 represented by the file name "navi1.nil". The navigation information 401 includes an object definition table 402 , a handler definition table 403 , and a bit flag table 404 .

In the row of the index number "0" of the object definition table 402 in the same figure, "-" is displayed as the index number of the standard bit flag. This indicates that there are no standard state bit flags defined in this target. In the object definition table 402, only one object is defined, and the object with the index number "0" is omitted because it is always displayed in the selected state and does not need a bit flag in the standard state.

The handler definition table 403 shows the script to be executed when the handler with the index number "3" is activated. The original index number "3" is "goto_entry" indicating a switching instruction to the entry directory. Among them, the content to be reproduced first when starting the reproduction of the interactive program is referred to as the entry content.

The bit flag table 404 represents the bit flag data of the index number "7".

2-2-1-3. Structure information storage unit 109

The structure information storage unit 109 stores a structure information table and entry information. The structure information table is combination information of display information and navigation information constituting each category. The entry information indicates information called an entry list.

As shown in FIG. 56 , the structure information table 501 displays, for each category number, information constituting a combination of presentation information and navigation information for each category stored in the transmission data storage unit 102 . The directory number is a number for identifying one directory in a sense among the plurality of directories stored in the transmission data storage unit 102 . As shown in FIG. 56, in the first line of the structure table 501, the directory identified by the directory number 0 represents the still image data identified by the file name Stillo.m2v stored in the presentation information storage unit 107 and stored in the navigation. The navigation information identified by navio.nif stored in the information storage unit 108 is a directory composed of groups. The same goes for other lines.

Furthermore, the entry information 502 shown in FIG. 56 indicates that the directory number of the conversation program entry directory stored in the transmission data storage unit 102 is 5.

2-2-2. Multiple information storage unit 104

The multiplex information storage unit 104 stores, as a multiplex information table, resource allocation information such as identifiers and areas for multiplexing the transmission data stored in the transmission data storage unit 102 into the MPEG2 transport stream. FIG. 57 is a diagram showing an example of the multiplex information table 601 .

The bit rate (Bitrate) recorded on the first line of the multiplexing information table 601 indicates the transmission rate allocated when the transmission data stored in the transmission data storage unit 102 is multiplexed in the MPEG2 transport stream. In this example, 6Mbps is assigned as the transfer rate.

The Original_network_id, transport_Stream_id, Service_id, and event_id in the second to fifth lines of the multiplexing information table 601 indicate that the dialogue program stored in the transmission data storage unit 102 is multiplexed as an event in the MPEG22 transport stream. Each value of the event identifier Original_nelwork_id, transport_Strcam_id, Service_id, and event_id. In this multiplex information table 601, "0X0001" is assigned as these values, but generally, unique values assigned to each service are written. This is illustrated in Figure 14.

In a normal satellite digital broadcasting system, one or more MPEG2 transport streams are transmitted using carriers of other frequency bands via one satellite (network). Each broadcast program is multiplexed with Original_network_id, transport_Stream_id, Service, id, and event_id in any MPEG2 transport stream according to the ETS 300 468 specification (hereinafter referred to as "DVB-SI specification"). Ori_ginal_network_id is an identifier for identifying a network. The transport_Stream_id is an identifier for uniquely identifying one transport stream in one network. Service_id is an identifier for uniquely identifying one type of service in one transport stream. evcnt_id is an identifier for uniquely identifying one type of event in one type of service. An event is a collection of parts, and corresponds to one program of existing analog broadcasting.

A part is one of the constituent elements of a program that expresses moving images, audio, etc. as a stream (program component) identified by a DID (packet identifier) of ISO/IEC 13818-1 (hereinafter referred to as "MPEG2 system specification"). Service is the meaning of bringing together the sequence of events. It corresponds to one program of existing analog broadcasting.

Programs (events) broadcast by a digital broadcasting system conforming to the DVB-SI standard can be unilaterally specified in all digital broadcasting systems by specifying groups of these Original_net-Work_id, transport_Stream_id, Service_id, and event_id. Details about Original_network_id, transport_stream_id, Service_id, and evewt_id are described in the DVB-SI specification.

The 6th to 10th rows of the multiplex information table 601 indicate the value of the PID assigned to each part constituting the event when the application stored in the transmission data storage unit 102 is multiplexed as an event in the MPEG2 transport stream. In addition, PMT_PID and DCR_PID represent the values of PIDs assigned to PMT (Program Map Table) and PCR (Program Clock Reference) described later, respectively.

NE_component_Pid (Navigation Information Part Group Identifier) indicates a PID value assigned to a part that multiplexes the navigation information, and the navigation information is stored in the navigation information storage unit 108 of the transmission data storage unit 102 .

VE_information_component_pid (stream correspondence information part packet identifier) indicates a PID value assigned to a part for multiplexing the stream correspondence table, which is created by the stream correspondence information table generating unit 111 described later.

VE_component_pid (image data component identifier) indicates a PID value assigned to a component that multiplexes image data, and the image data is stored in the presentation information storage unit 107 .

In addition, in this embodiment, one PID is provided as NE_Component_pid, VE_information_component_pid, and VE_component_pid respectively, but a plurality of them may be given. That is, although "0X0082" is provided for NE_component_pid, "0X0083" for VE_information_component-pid, and "0X0084" for VE_component_pid as PIDs, respectively, "0X0085" for NE_component_pid and "0X0085" for VE_information_component_pid can also be provided as PIDs. Provide "0X0086" on VE_component_pid and "0X0087" on VE_component_pid.

And although it does not exist in this embodiment, when the transmission data includes audio data, AE_information_component_pid and AE_Componenet_pid are assigned in the same way as image data.

2-2-3. Configuration of data multiplexing unit 103

The data multiplexing unit 103 includes: a multiplexing control unit 110 composed of a CPU and a memory; a stream correspondence information table generating unit 111 ; an identifier information adding unit 112 ; a navigation information table generating unit 113 ;

The data multiplexing unit 103 performs the following processing in order to generate the transmission data 165 shown in FIG. 51 .

2-2-3-1. Multi-channel control unit 110 (Part 1)

Once the multiplex control section 110 is activated by the transmitting section 106, it first refers to the configuration information table 501 and the multiplex information table 601 stored in the configuration information storage section 109 and the multiplex information storage section 104. An identifier for uniquely identifying each category is allocated, and a category identifier allocation table is created.

An example of this directory identifier assignment table 701 is shown in FIG. 58 . "Orig_nw_id" 703, "ts_id" (704) respectively represent the value of the identifier of the network and transport stream that transmit image data, sound data, and navigation information, and the image and sound data and navigation information constitute a directory. "VE_SVC_id" 705, " VE_event_id" 706 indicates the value of the identifier of the service and event to which the image data belongs, and "VE_id" 709 indicates the value of the identifier uniquely identifying the image data in one event. Similarly, "NE_SVC_id" 707, "NE_event_id" 708 indicates the identifier value of the service and event to which the navigation information belongs, and "NE_id" 710 indicates the identifier value for uniquely identifying the navigation information in one event. "AE_svc_id" 711, "AE_event_id" 712, and "AE_id" 713 are also all Same. Since the content is a set of image data, audio data, and navigation information, it can be uniquely identified by each set of identifiers.

In the directory identifier allocation table 701, corresponding to each directory number 702, "Orig_nw_id" 703, "ts_id" 704, "VE_svc_id" 705, and "VE_event_id" 706 are written in multiple information stored in the multiple information storage unit 104. Each value of Original_network_id, transport_stream_id, Service_id, and event_id of the path information table 601. Similarly, the values of service_id and event_id are also written in "NE_svc_id" 707 and "NE_event_id" 708 .

Since each column in the identifier allocation table 701 of the same drawing is the same as that of FIG. 15 described above, the identifiers used in the page base table of contents will be mainly explained here. "VE_id" 709 shows the value of the identifier which uniquely identifies the page base content image data in one event. "AE_id" 713 also represents an identifier value for uniquely identifying audio data. "NE_id" 710 indicates an identifier value that uniquely identifies navigation information in one event.

In this embodiment, "VE_id", "AE_id" and "NE_id" are used to identify one page base directory. In contrast, in the first embodiment, "VE_comp_tag", "AE_comp_comp_tag", and "NE_id" are used to identify one stream base directory. Therefore, the "VE_comp_tag" column and the "AE_comp_tag" column in this figure are described as "-".

And in this embodiment, the same value as that of the directory number 702 is given to "VE_id" 709 and "NE_id" 710 . In addition, "VE_id" 709 and "NE_id" 710 do not need to be catalog numbers 702, and it is only necessary to provide different values for each image data and navigation information.

Furthermore, in this embodiment, "AE_svc_id" 711, "AE_event_id" 712, and "AE-id" 713 do not provide identifiers because there is no audio data in the directory. Although "-" is written, when audio data is included In the case, it is distributed in the same way as image data and navigation information.

When the multiplexing control unit 110 completes the creation of the directory identifier assignment table 701, it creates a display image information identifier assignment table assigning values of "PID", "component_tag", and "stream_id" for each image data. FIG. 59 is a diagram showing an example of the display image information identifier assignment table 801. In this display image information identifier assignment table 801 , the value given by the identifier assignment table 701 is given to “VE_id” 709 . The value assigned by "VE_component_pid" in the multi-way information table 601 (where "0X0084") is supplied to the "PID" 803 . The same value is given to "component_tag" (part tag) 802 for one "PID" 803 (for example, the value "0X00" of "component_tag" is assigned to the value "0X0084" of "PID"). In "Stream_id" 804, the values from "eo" to "ef" written in hexadecimal correspond to "VE_id" 709 and are circulated sequentially. Then, the image data file name stored in the presentation information storage unit 107 identified by the “VE_id” 709 is written as the image data file 805 .

Also, when a plurality of identifiers are provided to VE_component_pid in FIG. 57, "PID" and "stream_id" can be assigned as follows. For the order of "VE_id", firstly, a VE_component_pid is taken out from the multi-channel information table and provided to "PID", and "stream_id" is given the value of "eo" ~ "ef" cyclically in hexadecimal notation. Stream_id takes a new VE_component_pid from the multi-channel information table every week and provides it to "PID". If the new VE_component_pid is lost, it returns the originally provided VE_component_pid. Each "PID" provides a different value to "component_tag".

Also, in this embodiment, all 16 "eo" to "ef" are used in hexadecimal notation that can be used as the value of Stream_id for image data, but only a part may be used. Also, when there is audio data, the stream-id is determined by the MPEG2 standard using 32 numbers from "co" to "df" in hexadecimal notation.

In addition, this "component_tag" 802 is used for indirect reference to the PID. The component_tag is a value that can be freely assigned in one-to-one correspondence, and the correspondence relationship between the component_tag and the PID is provided in the PMT described later. In the navigation information and stream correspondence information, the PID value is not directly referred to, and the component_tag is used for indirect reference. For example, when multiplexing with other programs, in the transmission unit 106 described later, even if the PID is replaced with another value, it also has The effect that the corresponding information of the stream does not change.

Once the image information identifier allocation table 801 is displayed, the multiplexing control unit 110 instructs the stream correspondence information table generation unit 111 to generate a stream correspondence table, instructs the identifier information addition unit 112 to add VE_id to the image data dedicated area, and instructs A navigation information table is generated in the navigation information table generation unit 113 .

2-2-3-2. Identifier information addition unit 112

The identifier information adding unit 112 reads out the image data stored in the presentation information storage unit 107 upon receiving an instruction to add identifier information via the multiplexing control unit 110 . The image data identifier VE_id is written on the dedicated area of the read image data bit stream width. Also, VE_id refers to and acquires the display image information identifier assignment table 801 formed in the multiplexing control unit 110 . The image data bit stream in which VE_id is written is stored in a storage area (not shown) after adding a file name.

FIG. 60 shows an example bit stream 901 of image data with a file name "VE(5)" to which identifier information is added. The bit stream 901 is coded according to the MPEG2 standard, and the value of VE_id "0X0005" is recorded in the user data area 903 of the video header 902 . Still image data 201 shown in FIG. 53A is recorded in image data area 904 . When the identifier information is added to all the image data, the multiplexing control unit 110 is notified of the completion of the addition.

In addition, in this embodiment, VE_id is used as the writing area, and although the user data area in the video header is used, an area for writing private data may also be used.

2-2-3-3. Navigation information table generation unit 113

The navigation information table creation unit 113 reads the navigation information stored in the navigation information storage unit 108 upon receiving an instruction to create a navigation information table from the multiplexing control unit 110 . When the read navigation information includes a high-continuity table, the directory identifier assignment table 710 is referred to, and the connection terminal information recorded by the directory number is converted into a record of each identifier to generate a navigation information table. When the high connection table is not included, the original navigation information is kept, only the file name is changed, and the navigation information table is generated. The generated navigation information is stored in a storage area (not shown).

Fig. 61 shows the navigation information table 1001 of the generated file name "NVT(5)". This navigation information table 1001 is created from the navigation information with the file name "navi5.nif" shown in FIG. 54 . The navigation information table 1001 includes a target definition table 1002 , a handler definition table 1003 , a high connection table 1004 , and a bit flag table 1005 .

In addition, "-" is written in the "orig_nw_id" column of the high connection table 1001, and the identifier is not recorded because the connection source (link yuan) and connection end (link first) of the directory are the same. So it means omit the record. The storage area reduction is obtained by omitting records. If the connection end is other services, then the identifiers are recorded on "VE_scrvice_id", "VE_event_id" and "NE_Service_id", "NE_event_id". Among them, the values of VE_id and NE_id of the index number "4" refer to the directory identifier allocation table 701 and record "0X0001" respectively; the values of VE-id and NE_id of the index number "5" refer to the directory identifier 701 and record "0X0002 ".

Fig. 62 shows the navigation information table 1101 of the file name "NVT(1)". This navigation information table 1101 is created from the navigation information with the file name "navi1.nif" shown in FIG. 55 . There are no changes on the directory because there are no highly connected tables.

When the navigation information table generation unit 113 completes the generation of the navigation information table, it notifies the multiplexing control unit 110 of the completion of the generation.

2-2-3-4. Flow correspondence information table generation unit 111

Upon receiving a stream correspondence table creation instruction from the multiplexing control unit 110, the stream correspondence information table generation unit 111 refers to the display image information identifier allocation table 801, and generates a stream correspondence table for each image data. This stream correspondence table is used to extract one piece of image data from the stream transmitted from the data transmitting device 101 to the data receiving device 121 .

FIG. 63A shows a stream correspondence table "VET(5)" 1201 used for fetching image data "VE(5)" on the data receiving device 121 side. The "first_pts" of the stream correspondence table 1201 represents the playback start time information, and this information represents the time for replaying the first frame of the corresponding image data in units of 1/90,000th of a second. For example, formula (1) can be used to obtain:

$\mathrm{<span\; class="notranslate">\; first</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; pts</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; N</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span><span\; class="notranslate">\; [</span>\underset{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VE</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; NVT</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VET</span>}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; \}</span><span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; ]</span><span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; 90000</span>}<span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

Among them, S_VE(x) is the size when the image data VE(x) stored in the storage area of the identifier information adding part 112 is converted into a transport stream packet according to the MPEG2 system standard; S_NVT(x) is the size converted into the navigation information according to the MPEG2 system standard The size of the navigation information table NVT(x) stored in the storage area of the table generation unit 113 when converted into transport stream packets; S_VET is one stored in the storage area of the stream correspondence information table generation unit 111 in accordance with the MPEG2 system standard The size of the stream correspondence table VET converted into transport stream packets. The unit of size is bits. In addition, R indicates the number of times the stream correspondence table VET is repeated for multiplexing, and takes an integer value from "1" to "(PXS)". Here, P is the number of PIDs allocated for transferring the part of the image data allocated in the multiplexing information storage unit 104, which is "1" in this embodiment. S represents the number of Stream_ids used in the display image information identifier assignment table 801, which is "16" in this embodiment. B is the bit rate, which is "6Mbps" in this embodiment.

In addition, S_VE(x) increases the size of the necessary PES packet header and trailer information components for each PES packet unit in the size of VE(x), and also increases the required transport packet header and trailer information components for each transport packet unit. Get it. In addition, S_NVT(x) can be obtained by adding the necessary section header and trailer information component size in each section unit of the NVT(x) size, and then adding the necessary transport packet header and trailer information component size in each transport packet unit. . Like S_NVT(x), S_VET is obtained by adding the size of the section title to the size of VET. Furthermore, all VETs are the same size in this embodiment. Furthermore, the detailed list of PES packets, transport packets, and sections is defined by the MPEG2 system specification.

"last_pts" of the stream correspondence table 1201 indicates playback termination time information indicating the time at which the last frame of the corresponding image data is played back in units of 90,000th of a second. In this embodiment, the image data is used for still images. " last_pts" (end playback time information) coincides with "first_Pts".

Component_tag and Stream_id of the stream correspondence table 1201 are obtained by referring to the image data corresponding to the display image information tag assignment table 801 to obtain the values of the assigned component_tag and Stream_id.

FIG. 63B shows the image data first stream correspondence table 1202, and FIG. 63c shows the image data fifteenth stream correspondence table 1203.

In addition, the time "0" to which "first_pts" and "last_pts" of these stream correspondence tables 1201, 1202, and 1203 are based is the time when the data stored in the transmission data storage unit 102 is first multiplexed in the transport stream.

In addition, in this embodiment, the display image information identifier assignment table 801 is referred to in the stream correspondence table, and although the value of the assigned component_tag is recorded, it can also be replaced with the value of the component_tag, and the assigned one can be directly recorded in the multiplex information table 601. The value of VE_component_pid.

2-2-3-5 Multiplexing control unit 110 (Part 2)

The multiplexing control unit 110 specifies the number T of duplicate unit directories upon receiving notifications of the end of each process from the identifier information adding unit 112 , the navigation information table generating unit 113 , and the flow correspondence information table generating unit 111 . The so-called repetition unit number T simply refers to the total number of contents M and the number of pseudo-lists included in the transmission data 165 shown in FIG. The total amount M of contents in is called T such that M≦P×S×n=T.

Among them, P is the same as described in the above formula (1), and represents the number of PIDs allocated to the part for transmitting image data in the multiplex information storage unit 104, and S represents the same as described in the above formula (1). The number of Stream_ids, n is the smallest integer satisfying M≤T. In this embodiment, since P=1, S=16, and M=63, T is 64. Also, when the number T of repetition unit directories is greater than the total number of directories M, the multiplexing control unit 110 multiplexes all the directories in the transport stream, and then multiplexes the smallest directory (T-M) or more size zero packets. In this way, the multi-way position interval D between the image data and the stream correspondence table corresponding to the image data can be guaranteed to be at least a certain value [more than (P×S-1) times the minimum directory size].

Then multiplexing control section 110 uses formula (2) to find the cycle length L of repeating unit directory number T [make all directories and directory (T-M) size zero grouping more with bit rate B stored in the multiplexing information storage section 104 The value of conveying stream length expressed in units of 90,000th of a second during roadization].

$\mathrm{<span\; class="notranslate">\; L</span>}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; [</span><span\; class="notranslate">\; [</span>\underset{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VE</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; NVT</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VET</span>}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; \}</span>$

$<span\; class="notranslate">\; +</span><span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VE</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; NVT</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VET</span>}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; \}</span><span\; class="notranslate">\; *</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; m</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span><span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; ]</span><span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; 90000</span>}<span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

Wherein, M and T are the total number of the above-mentioned directories and the number of repeating unit directories, and the descriptions of S_VE(x), S_NVT(x), S_VET, P, and B are the same as those of the above-mentioned formula (1).

The multiplexing control unit 110 sets "0" in the directory counter i, and sets "0" in the multiplexing start position WP. The WP value indicates the time in the transport stream from the first information position of the multiplexed directory.

Next, "0" is set in the VET counter j value. Use the value of VET counter j to find the cycle number c and catalog number N. The cycle number c is the integer part of the quotient of {i+(p×s)-1-j}÷T, and the catalog number N is the remainder of {i+(P×s)-1-j}÷T. Next, it is judged whether the Nth VET(N) of the stream correspondence table is stored in the stream correspondence information table generator 111, and if it is stored, the number of cycles c multiplied by the number of duplicate unit directories T is added to the first_pts and Last_pts of the VET(N) The value of the length L of the week.

Then, the multiplexing unit 114 is instructed to multiplex the VET(N). At this time, the multiplexing start position WP and the bit rate B are notified, the value of "VE_information_component_pid" in the multiplexing information table 601 is notified as the PID, and the value of "VE_id" corresponding to the directory number "N" of the directory identifier allocation table 701 is notified. The value is notified as table_id_extension.

When VET(N) is not stored in the stream correspondence information table generation unit 111, zero packet multiplexing of S_VET size is instructed to the multiplexing unit 114, and the multiplexing start position WP and the bit rate B are notified.

After a multiplexing instruction is given to the multiplexing unit 114, the multiplexing start position WP is calculated. It can be calculated by WP=+S-VET/B. Then add "1" to the value of the VET counter j to judge whether the value of the VET counter j and the flow corresponding to the number of multi-channels R is consistent. N) multiplex processing.

When the values of the two counters are judged to be consistent, the multiplex control unit 110 calculates the number of cycles c and the directory number N in the same manner as above, and judges whether to store them in the identifier information adding unit 112 or the navigation information table generating unit 113. Directory with directory number N. When it is judged that it is stored, multiplexing of VE(N) is instructed to the multiplexing unit 114 . At this time, the multiplexing unit 114 is notified of the values of the multiplexing start position WP, bit rate BV(N), PIN, and Stream_id. Also, the values of PIN and Stream_id are taken from the display image information identifier assignment table 801 to assign the "VE_id" value to the "N" image data "PIN" and "Stream_id" values. The bit rate BV(N) is calculated by Equation (3) shown below.

bit rate Bv(N)＝{S_VE(N)*B}/{S_VE(N)+S_NVT(N)}......(3)

The reference numbers in the formula are the same as those in the above formula (1).

In addition, multiplexing of NVT (N) is instructed to the multiplexing unit 114 . At this time, the multiplexing unit 114 is notified of the multiplexing start position WP, bit rate Bn(N), PID, and table_id_extension value. Regarding the PID, the multiplexed information storage unit 104 is referred to, and the PID value assigned to the part assigned in the transmission of the navigation information is fetched. For table_id_extension, the "NE_id" value corresponding to the directory number N is fetched from the directory identifier assignment table 701 . The bit rate Bn(N) is calculated by the following equation (4).

Bit rate Bn(N)＝{s_NVT(N)*B}/{S_VE(N)+S_NVT(N)}.........(4)

The reference numbers in the formula are the same as in the above formula (3).

Next, the multiplexing control unit 110 obtains the multiplexing start position Wp using the formula WP=WP+{S_VE(N)+S_NVT(N)}/B.

In addition, when the directory N is not stored, the multiplexing control unit 110 instructs the multiplexing unit 114 to multiplex zero packets of the size S_VE(O)+S_NVT(O), and notifies the multiplexing start position WP.

In addition, although the size of the multi-way zero packet is the sum of the S_VE(O) and S_NVT(O) of the directory number "0", it is also possible to set the S_VE(K)+S_NVT( K) zero packet multiplexing.

The multiplexing control unit 110 obtains the multiplexing start position WP using the calculation formula WP=WP+{S_VE(O)+S_NVT(O)}/B.

Then, "1" is added to the value of the directory counter i, the value of the VET counter j is calculated again, and the processing after multiplexing VET(N) is repeated.

2-2-3-6. Multiplexing section 114

The multiplexing unit 114 multiplexes the transmission data 165 shown in FIG. 51 in the MPG2 transport stream. 64 and 65 are diagrams of more specific multiplexed streams in which identification information is added to the diagram shown in FIG. 51 . Describe in detail below.

The multiplexing unit 114 multiplexes data in the MPEG2 transport stream by a method defined in the MPEG2 system specification in accordance with an instruction from the multiplexing control unit 110 . When the multiplexing instruction of the stream correspondence table VET(N) is received from the multiplexing control unit 110, the stream correspondence table VET(N) is read out from the stream correspondence information table generation unit 111, and the stream correspondence table VET(N) specified by the specified multiplexing start position WD is used. PID, table_id_extension, bitrate, multiplexed in transport stream. And, if the multiplexing instruction of image data VE(N) is received from the multiplexing control section 110, the image data corresponding to the identifier added by the identifier information adding section 112 is read out, and the specified multiplexing start position WP is used. PID, Stream_id, bit rate BV(N), multiplexed in transport stream. And if the multi-way instruction of the navigation information table NVT (N) is made by the multi-way control part 110, then the navigation information table is read out from the navigation information table generation part 113, and the PID, Table_id_extension, Table_id_extension, The bit rate Bn(N) is multiplexed in the transport stream. When zero packet multiplexing is instructed, zero packets of the size specified by the specified multiplexing start position WP are multiplexed at the specified bit rate B.

Furthermore, the initial value of the header of the generated transport stream is "0" for the PCR, and the PCR_PID notified by the multiplexing control unit 110 is used for multiplexing.

FIG. 64 shows an example of a transport stream generated by the multiplexing unit 114 . In the transport stream 1701, 63 directories stored in the transmission data storage unit 102 are multiplexed. The value "0X0084" given by the multiplexing information table 601 as PID is supplied to 63 image data VE(0) to VE(62), and is supplied cyclically as Stream_id and multiplexed.

Also, the value "0X0083" given by the multiplex information table 601 is given to the stream correspondence table VET(N), and the same value as the image data identifier "VE_id" is given as table_id_extension. The stream correspondence table VET(N) is multiplexed every video data VE(N). The stream correspondence table repeats multiple times R to be "1".

In addition, 63 navigation information tables NE(0)-NE(62) provide the value "0X0082" given by the multiplex information table 601 as PID, and provide the value of the navigation information identifier "NE_id" as table_id_extension and multiplex it. And multiplex the PCR 1702 including the time reference information.

One transmission data 165 shown in FIG. 51 ranges from the flow correspondence table VET(15) to the zero packet 1705 as indicated by the arrow 1708 .

In the transport stream 1701, the stream correspondence table VET(N) is multiplexed only at the position preceding 15 pieces of image data corresponding to the image data VE(N). Because 16 Stream_ids are provided to the image data cyclically, between the stream correspondence table VET(N) and the corresponding image data VE(N), other image data having the same PID and stream_id as VE(N) are not Multiple ways. Therefore, after the data receiving device 121 obtains the stream correspondence table VET(N), it can extract the desired image data VE(N) by separating only the one that appears first among the image data provided with the same PID and Stream_id that exists in a plurality. ). For example, between the stream correspondence table VET(16)1703 and the image data VE(16)1704. There is no other image data providing PID "0X0084", Stream_id "oxeo". Therefore, the data receiving device 121 has four image data, VE(0), VE(16), VE(32), and VE(48) of PID "0X0084" and Stream_id "oxeo", and separates the stream correspondence table VET(16 ) 1703, the first video data VE(16) appears, and the requested video data VE(16) can be reproduced.

Furthermore, the configuration of the transport stream 1701 is such that 15 content data are multiplexed between the stream correspondence table VET(N) and the corresponding VE(N). That is, after the stream correspondence table VET(N) appears, the time D until the corresponding image data VE(N) appears must be guaranteed to be longer than the time required for at least 15 directories of the minimum size to be transmitted. During this time D, the data receiving device 121 interprets the stream correspondence table information, and if necessary processing is performed to separate the image data, the desired image data can be reproduced reliably. The transmission time of time D higher than 15 directories will also be ensured near the repeated cycle point, so the zero packet 1705 with the size of 1 directory is multiplexed at the end of the cycle. In this way, when the cycle point is continuous between VET (N) and VE (N), for example, the interval between VET (O) 1706 and VE (O) 1707 must also be guaranteed to be greater than the transmission minimum size of 15 directories. It takes time.

FIG. 65 shows an example of transport streams generated by the multiplexing unit 114 when the number of repetitions R of the stream correspondence table is set to "16".

In the transport stream 1711, the stream correspondence table VET(N) is multiplexed 16 times from the position 15 directories ahead of the corresponding image data VE(N) to the multiplexing start position of VE(N). The data receiving device 121 acquires the stream correspondence table first, and reproduces the corresponding image data after that, so the shorter the time D is, the faster the required image data can be reproduced. However, once the time D becomes shorter, the data receiving device 121 interprets the stream correspondence table at a higher speed, and must perform necessary processing for separating images. For the transport stream 1711, if the stream correspondence table is multi-multiplexed, the data receiving device 121 can obtain the multi-channel stream correspondence table at a position close to the image data when the load is light, and reproduce the image data at high speed. When the load is heavy, it is possible to obtain the multi-channel stream correspondence table at a position far from the image data, and reliably reproduce the image data, which is possible for the above-mentioned control.

When the multiplexing unit 114 generates the transport stream 1701 shown in FIG. 64 , it sequentially outputs it to the transmitting unit.

2-2-4. System information table generation unit 105

The system information table generation unit 105 refers to the multiplex information storage unit 104, etc., and generates NIT (Network Information Table), EIT (Event Information Table) as program description (program specification) information used for program selection in the data receiving device 121. ), SDT (Service Description Table), PAT (Program Association Table) and PMT (Program Map Table).

Specifically, since it is the same as the system information table generation unit 5105 in the first embodiment, the description here is limited to the generation result (system information table) in this embodiment.

66A to 66C show examples of NIT, SDT, and EIT generated by the system information table generating unit 105 .

67 and 68 show examples of PAT and PMT generated by the system information table generating unit 105 .

FIGS. 69A to 69D show specific EnntryDescriptor, NE_Component Descriptor, VE_Information Descriptor, and Stream identifier descriptor in the PMT generated by the system information table generating unit.

The values of "entry VE-id", "entryAE_id", and "entry NE_id" are described in "Entry Descriptor" in FIG. 69A. This indicates that the entry directory is the page base directory. This point is different from "Entry Descriptor" shown in FIG. 25 of the first embodiment. That is, in FIG. 25, the values of "entry VE_Comp_tag", "entry_AE_Comp_tag", and "entry_NE_id" indicating that the entry directory is a page base directory are described.

Once the system information table generation unit 105 receives the notification from the multiplexing control unit 110, it first refers to the multiplexing information storage unit 104, and generates NIT, EIT, SDT, and PAT according to the requirements of the DVB-SI standard and the MPEG2 system standard. The generation section includes information necessary for the data reception device 121 to select an event that multiplexes the data stored in the transmission data storage section 102 .

The NIT records physical information on transmission lines and the like for each transport stream transmitted by a network identified through a specific network. FIG. 66A shows an example of the NIT 1301 generated by the system information table generating unit 105. network_id is the network identified by "0X0001", in the network identified by "0X0001" network_id, transmits the transport stream identified by "0X0001" Original_network_id, transport_Stream_id, showing the frequency and modulation displayed in the "transmission elements" Description of the method.

The SDT records service names and the like with respect to each service included in a specific transport stream. FIG. 66B shows an example of the SDT 1302 generated by the system information table generating unit 105. In the transport stream whose transport_Stream_id is identified by "0X0001", the service whose Service_id is identified by "0X0001" is included, and the information content such as the service name indicated in the "information such as service name" is displayed.

The EIT records information on event names, start times, and end times for each event included in a specific service. FIG. 66c shows an example of the EIT 1303 generated by the system information table generating unit 105. In the service whose Service_id is identified by "0X0001", the event whose erent_id is identified by "0X0001" is included, and the information list which shows the event name etc. in "event name etc. information" is displayed.

The PAT records PID information of a PMT (Program Table) regarding each program included in a specific transport stream. FIG. 67 shows an example of the PAT 1401 generated by the system information table generating unit 105. In the transport stream whose transport_Stream_id is identified by "0X0001", Program_no includes the program of "0X0001", showing the directory whose PMT's PID is "0X0080". Program_no is the same as Serrice_id, and the program is equivalent to an event.

Next, the system information table generation unit 105 refers to the multiplex information storage unit 104, the multiplex control unit 110, and the configuration information storage unit 109, and generates a PMT corresponding to a program for multiplexing transmission data according to the requirements of the MPEG2 system standard, and the transmission data is stored in In the transmission data storage unit 102. FIG. 68 shows an example of the PMT generated by the system information table generating unit 105. "program_number" is a value indicating the program number for multiplexing transmission data, and the "Service_id" value "0X0001" of the multiplexing information table 601 is read and written.

"PCR-PID" is a value indicating the PID of the packet including the program information (PCR) to make the program decoding accurate. For this, the value "0X0081" of "PCR_PID" in the multiplex information table 601 is taken out. write.

"Entry_Desriptor" is a descriptor including the identifier information of the entry directory reproduced most recently when the program is selected. Fig. 69A shows an example of "Entry_Descriptor". The descriptor_tag is an identifier indicating the type of a descriptor, and a value determined during use of "Entry_Descriptor" (here, 0X98) is written therein.

"entry_VE_id", "entry_AE_id", and "entry_NE_id" represent identifier values for identifying image data, audio data, and navigation information constituting the entry list. The system information table generation unit 105 refers to the directory information 502 of the structure information storage unit 109 to obtain the directory number "5" of the entry directory, and refers to the identifier allocation table 701 of the multiplexing control section 110 to extract the "VE_id" corresponding to the directory number "5". "value "0X0005" and "AE_id" value "-" and "NE_id" value "0X0005", respectively write "entry_VE-id", "entry_AE_id", "entry_NE_id".

Table 1502 in PMT 1501 shows a PID value "PID" for identifying each part constituting the program, "Stream_type" indicating the type of data transmitted in each network, and descriptor information corresponding to each part.

First, the system information table generator 105 takes out the value "0X0082" corresponding to "NE_component_pid" from the multiplex information table 601 for the part related to the transmission of navigation information, and writes it as "PID" to represent the data transmitted in the network. The type is the value "0X05" of the sector data is written as "Stream_type". NE_component_Descriptor indicating that the part transmits navigation information is written as "descriptor". Fig. 69B shows an example of NE_Component_Descriptor. The value specified for "NE_Component_Desriptor" (where 0X9a) is written in the descriptor_tag.

Next, with respect to the part of the transport stream correspondence table, the value "0X0083" corresponding to "VE_information_component_Pid" is taken out from the multiplex information table 601, written as "PID", and the value indicating that the type of data transmitted by this part is segment data "0X05" is written as "Stream_type", and VE_Information_Component_Descriptor indicating the corresponding table of this part of the transport stream is written as "descriptor". FIG. 69C shows an example of VE_Information_Component_Descriptor. Write the value for "VE_information_Component_Descriptor" determination on "descriptor-tag" (where 0X9a).

Then, the system information table generator 105 takes out the value "0X0084" corresponding to "VE_Component_pid" from the multiplexing information table 601 for the part related to the transmission of image data, writes it as "PID", and writes the data indicating that the part is transmitted. A value "0X02" whose type is a video stream is written as "Stream_type", and a Stream_identifier_descriptor indicating a part tag value of the part is written as "descriptor". Fig. 69D shows an example of Stream_identifier_descriptor. Write the value specified for stream_identifier_deseriptor (where 0X52) on "descptor_tag". For "component_tag", the display image information identifier assignment table 801 of the multiplexing control unit 110 is referred to, and the component_tag value "0X00" written in the part where "PID" is assigned to "0X0084" is fetched.

2-2-5. Transmitter 106

The transmission unit 106 has a scheduler, and activates the multiplexing control unit 110 at a predetermined time, for example, 5 minutes earlier than the event transmission start time. Then, when the event transmission start time is reached, the system information table generation unit 105 generates the transport stream outputted by the multiplexing unit 114 at intervals determined using a predetermined PID in accordance with the requirements of the DVB-SI standard and the MPEG2 system standard. The system information tables of NIT, PAT, PMT, SDT, EIT, etc. are repeatedly multiplexed, subjected to modulation processing, and transmitted to the data receiving device 121 or the like.

FIG. 70 shows that the multiplexed transport stream 1801 is modeled. The NITI 1802 , PAT 1803 , PMT 1804 , SDT 1805 , and EIT 1806 are further multiplexed in the transport stream 1701 multiplexed in the multiplexing unit 114 .

2-2-6. Operation of the data transmitter 101

The operation of the data transmitting device 101 of this embodiment will be described below using the flow charts shown in FIGS. 71 , 72 , and 73 .

First, the multiplexing control unit 110 provides VE_id and NE_id for each directory number, and creates an identifier assignment table (S1902). Next, create the display image information identifier allocation table 801 (S1904), instruct to add identifier information to the identifier information adding unit 112, create a navigation information table in the navigation information table generating unit 113, and create a stream corresponding information table. The flow correspondence table is generated in the unit 111.

The identifier information adding unit 112 adds and stores an image data identifier in a dedicated area of the bit stream of the image data stored in the presentation information storage unit 107 . Once the addition of the identifiers for all the image data is completed, the multiplexing control unit 110 is notified of its purpose (S1906).

The navigation information table creation unit 113 creates a navigation information table from the navigation information stored in the navigation information storage unit 108 . Once all the navigation information tables are created, the purpose is notified to the multiplex control unit 110 (S1908).

The stream correspondence information table generation unit 111 refers to the display image information identifier table 801 created by the multiplexing control unit 110 to generate a stream correspondence table. When all the stream correspondence tables have been created, the multi-path control unit 110 is notified of its contents (S1910).

The system information table generating unit 105 generates various system information tables such as NIT, SDT, EIT, PAT, and PMT (S1912).

The multiplexing control unit 110 determines the number T of directories in repetition units when the directories are multiplexed in the transport stream (S1914). Use the unit of 90000th of a second to calculate the length L of one cycle of the directory number T (use the bit rate to store all directories and zero packets of the size of M-T in the multiplexing re-storage section 104 as the length of the transport stream when multiplexing ) (S1916). The multiplexing control unit 110 notifies the multiplexing unit 114 of PCR_PID multiplexing and instructs multiplexing of PCRs (S1918). Next, "0" is set to both the directory counter i and the multiplexing start position WP (S2002).

Then, the multiplexing control unit 110 sets "0" to the VET counter (S2004). Find the cycle number C and the catalog number N. C is the quotient of {i+(p×s)-1-j}÷T (integer part), and N is the remaining material (integer) (S2006).

Next, the multiplexing control unit 110 judges whether the flow correspondence table VET(N) is stored in the storage area of the flow correspondence information table generation unit 111 (S2008), and if stored, adds CXL to first_pts and last_pts of the VET(N) (S2010) .

The multiplexing control unit 110 instructs the multiplexing unit 114 to multiplex the stream correspondence table VET(N) in the transport stream, and notifies the multiplexing start position WP, bit rate B, PID, and table_id_extension (S2012) and proceeds to S2014.

In S2008, when the multiplexing control unit 110 determines that a VET (N) having a stored flow correspondence table is provided, it instructs the multiplexing unit 114 to multiplex a zero packet having the same size as the S_VET. The multiplexing start position WP and the bit rate B are simultaneously notified. The multiplexing unit 114 multiplexes the zero packets in the transport stream (S2018), and proceeds to S2014.

In S2014, the multiple control unit 110 calculates WP=WP+{S-VET/B}, and adds "1" to the VET counter; The number of times R value is compared (S2016). When j=R, move to S2102, and when j<R, return to S2006.

In S2102, the multiplex control unit 110 sets the number of cycles c to be the quotient (integer part) of i/T, and sets the catalog number N to be the remainder (integer) of i/T. Referring to the directory identifier allocation table of the structure information storage unit 109, it is judged whether the directory number N exists (S2104), and if it exists, the multiplexing unit 114 is instructed to multiplex the bit stream of the image data VE(N). At this time, the bit rate BV(N) is calculated, and the multiplexer 114 is notified of BV(N) together with the values of "PID" and "Stream_id" recorded in the display image information identifier allocation table 801 . The multiplexing unit 114 multiplexes the image data VE(N) into the transport stream (S2106).

Then, the multiplexing control unit 110 instructs the multiplexing unit 114 to multiplex the navigation information table NVT(N). At this time, the bit rate Bn(N) is calculated, and Bn(N) is notified to the multiplexing unit 114 together with the multiplexing start position Wp, PID, and table_id_extension. The multiplexing unit 114 multiplexes the navigation information table NVT(N) in the transport stream (S2108).

The multiplexing control unit 110 calculates the multiplexing start position WP.

WP=WP+{S_VE(N)+S_NVT(N)}/B (S2110). Add "1" to the directory counter i (S2112), and return to S2004.

In S2104, when it is determined that there is no multiplex, the multiplex control unit 110 instructs the multiplex of zero packets of the size S_VE(O)+S_NVT(O) together with the multiplex start position WP and the bit rate B. The multiplexing unit 114 multiplexes the indicated amount of zero packets in the transport stream ( S2114 ).

The multiplex control unit 110 obtains the multiplex start position WP by using WP=WP+{S_VE(O)+S_NVT(O)}/B (S2116), and proceeds to S2112.

According to the above operation, for example, when the number of multiplexing R is set to "1" for the repetition of the stream correspondence table VET(N), in the multiplexed stream as shown in FIG. 64, when R is set to "6", the In the multiplexed stream shown in FIG. 65 , the transport stream shown in FIG. 70 in which the NIT, RAT, etc. are multiplexed is transmitted.

2-2-7. Summary

As described above, the data transmission device 101 of this embodiment assigns identifiers to the transport stream, and multiplexes and repeatedly transmits image data and navigation information constituting each content.

The navigation information includes the identifier of the catalog image data and the navigation information identifier that are highly linked, auxiliary image information for displaying menus, etc., and scripts for image switching and the like. Therefore, the data receiving device 121 can fetch and replay any content by designating an identifier from the transport stream based on the navigation information, and realize dialogue through a one-way channel.

2-2-8. Others

2-2-8-1.

Furthermore, in the present embodiment, although the case of a still image of the image data is described, the image data may also be a moving image. When the image data is moving image data, the calculation formula of "first_pts" and "last_pts" in the formula (1), the calculation formula of the stream length L in the formula (2), and the image data VE(N) assigned to the formula (3) The calculation formula of the bit rate BV(N), the calculation formula of the bit rate Bn(N) of the navigation information table NVT(N) assigned to the formula (4), and the image data VE(N) in the multiplexing control section 110 ) and the navigation information table NVT(N) are multiplexed and then the formula for calculating the multiplex start position WP can be changed as follows, for example.

In the case of moving images, the bit rate BV(N) assigned to the image data VE(N) is based on the predetermined bit rate of the video elementary stream, and is estimated to be increased during conversion in the transport stream. The remainder of subtracting the bit rate BV(N) allocated to the image data VE(N) from all the bit rates B is allocated to the navigation information table NVT(N).

At this time, the "first_pts" value of the image data VE(N) can be calculated according to formula (5).

$\mathrm{<span\; class="notranslate">\; first</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; pts</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; N</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>$

$<span\; class="notranslate">\; =</span><span\; class="notranslate">\; [</span>\underset{\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}<span\; class="notranslate">\; \{</span>\mathrm{<span\; class="notranslate">\; MAX</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VE</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; Bv</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; NE</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Bv</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VET</span>}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span>$

$<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VE</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; FIRST</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; N</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; Bv</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; x</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; +</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; VET</span>}<span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; R</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \}</span><span\; class="notranslate">\; ]</span><span\; class="notranslate">\; *</span>\mathrm{<span\; class="notranslate">\; 90000</span>}<span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span>$

However, BV(x) represents the bit rate assigned to the image data VE(x); S_VE_FIRST(x) represents the size when converted in the transport stream according to the MPEG2 system standard with the image data VE(x) as the first frame; MAX{ A, B} represents the larger value of A and B.

In the case of a moving image, "last_pts" and "first_pts" do not match, and can be obtained, for example, using Equation (6).

last_pts(N)=first_pts(N)+{(N_FRAME(x)/Frame_per_sec)*90000}...(6)

However, N-FRAME(x) represents the number of frames of moving image data VE(x), and FRAME_PER_SEC represents the number of frames per second (for example, 29.97 in NTSC format).

In this case, in the case of a moving image, the multiplexing control unit 110 instructs the multiplexing of VE(x) and NE(x) to the multiplexing unit 114, and then updates WP according to equation (7).

wp=wp+MAX(S_VE(x)/Bv(x)S_NE(x)/(B-Bv(x)))...(7)

2-2-8-2.

In addition, in the data transmission device 101, the multiplexing unit 114 is configured to sequentially generate the transport stream 1701 at the time of event transmission, but the multiplexing unit 114 generates and stores a transport stream with a length L of only one cycle, and the transmitting unit 106 sends data to When the receiving device 121 transmits, it repeatedly reads the transport stream, and can also do certain processing to repeat the transmission.

2-2-8-3.

Also, in this embodiment, corresponding image data and navigation information tables are multiplexed at the same time, but it is not necessary to set the same time. Since the navigation information table and the image data corresponding thereto need to be separated into individual pieces as described above, they may be multiplexed at each individual time.

2-3. Data receiving device 121

The data receiving unit 121, which will be described with reference to FIG. 49, interactively retrieves the playback list from the MPEG2 transport stream transmitted by the data transmitting unit 101 according to user operations.

2-3-1. Receiving unit 122

The reception unit 122 receives the MPEG2 transport stream corresponding to the transport stream identifier designated by the reception control unit 126 and outputs it to the TS decoder unit 123 .

2-3-2. TS decoder unit 123

The TS decoder unit 123 has a filter condition storage unit 131 that stores a filter condition set by the reception control unit 126, and separates only images with specified identifiers from the transport stream output from the reception unit 122 based on the filter conditions. Data or audio data is output to the AV decoding unit 124 . Then, the table data with the designated identifier is separated, and output to the area secured in the received data storage unit 125 according to the identifier. And the specified identifier PCR (reference clock information) is separated and output to the AV decoder unit 124 . In addition, a plurality of filter conditions may be stored in the filter condition storage unit 131 at the same time. The TS decoder unit 123 can perform a plurality of separation processes in parallel.

74A and 74B show an example of a filter condition table stored in the filter condition storage unit 131 . Each row of the filter condition table 2201 represents one filter condition. In the "filter identification number" column 2202, a number for identifying each filter condition is described. In the "START/STOP" column 2203, "START" is set when each filter condition is in the start state, and "Stop" is set in the stop state. The TS decoder unit 123 performs separation processing according to the filter condition in the start state, and does not perform separation according to the filter condition in the stop state. In the "PID" column 2204, the value of the data PID separated by each filter condition is set. In the "Stream_id" column 2205, the value of Stream_id of the data separated by each filter condition is set. In the "table_id_extension" column 2206, the value of table_id_extension of the data separated by each filter condition is set. When the "-" value is set in the "PID" column 2201, "Stream_id" column 2205, and "table_id_extension" column 2206, there is no condition, that is, the value of the identifier indicates separation in any number of cases. In the "Output" column 2207, an output to output the separated data is set.

The row corresponding to the filter identification number "0" of the filter condition table 2201 indicates the image data filter condition. The AV decoder unit 124 is set in the "output terminal" column 2207, and the "table_id_extension" 2206 cannot be set. In the "PID" 2204 and "Stream_id" 2205, the reception control unit 126 sets the values of the image data PID and Stream_id to be separated. The row corresponding to the filter identification number "1" indicates the filter condition of the sound data. The AV decoder unit 124 is set in the "output terminal" column 2207, and no value can be set in the "table_id_extension" column 2206. In the "PID" column 2204 and the "Stream_id" column 2205, the PID and Stream_id values of the audio data to be separated are set by the reception control unit 126 .

The row corresponding to the filter identification number "2" indicates the filter condition of the stream correspondence table VET. The stream correspondence information table storage unit 132 is set in the "output terminal" 2207, and a value cannot be set in the column 2205 of "stream_id". In the "PID" column 2204 and "table_id_extension" 2206, the reception control unit 126 sets the value of the PID and table_id_extension of the stream correspondence table to be separated.

The row corresponding to the filter identification number "3" indicates the filter condition of the navigation information table. The navigation information table storage unit 133 is set in the “output terminal” column 2207 , and no value can be set in the “Stream_id” column 220 . In the "PID" column 2204 and the "table_id_extension" column 2206, the values of the PID and table_id_extension of the navigation information table to be separated are set by the receiving device.

Then, "START" or "STOP" is set in each filter condition "START/STOP" column 2203 by the reception control unit 126, and the separation process of the TS decoder unit 123 is set to start or stop.

In addition, the filter condition storage unit 131 stores system information tables such as NIT, SDT, EIT, PAT, and PMT, and unillustrated filter conditions for PCR (reference clock information) in addition to these.

In the filter condition table 2201, the filter condition corresponding to the image data of the filter identification number "0" and the filter condition of the sound data corresponding to the filter identification number "1" are set to a stop state by the receiving control section 126, at this time , the TS decoding unit 123 does not separate image data and audio data.

Furthermore, in the filter condition table 2201, the filter condition of the flow correspondence table VET corresponding to the filter identification number "2" is used by the reception control unit 126, the value of "PIQ" is set to "0X0083", and the value of "table_id_extension" is set to " 0X0005", the START/STOP column 2203 is set to the start state. At this time, the TS decoder unit 123 separates the stream correspondence table VET(5) according to the set filter condition from the transport stream 1801 shown in FIG. 70 transmitted by the transmission unit 106, and stores it in the stream correspondence information table The receiving control unit 126 is notified by the receiving control unit 132. The catalog of VET(5) is shown in Fig. 63A.

In the filter condition table 2201, the filter condition of the navigation information table NVT corresponding to the filter identification number "3", the value of "PID" is set to "0X0084" by the reception control unit 126, and the value of "table_id_extension" is set to " 0X0005", the START/STOP column 2203 is set as the start state.

At this time, the TS decoder unit 123 separates the navigation information table NVT(5) according to the set filter condition from the transport stream S01 shown in FIG. , and notify the reception control unit 126. The content of the navigation information table NVT(5) is as shown in FIG. 61 .

Furthermore, in the filter condition 2208, the reception control unit 126 sets the "PID" to "0X0084" and the "Stream_id" to "0Xe5" corresponding to the filter condition of the image data with the filter identification number "0", Set to start state. At this time, the TS decoder section 123 sequentially separates the image data VE(5), image data VE( 21), the image data VE(37), and the image data VE(53) are output to the AV decoder unit 124. Among the four image data, which image to separate first depends on the timing at which the filter condition is set to the start state. Then, the reception control unit 126 separates only the first one of the four image data by setting the filter condition to a stop state at an appropriate timing, and outputs it to the AV decoder unit 124 .

2-3-3. AV decoder unit 124

The AV decoder unit 124 has a clock unit not shown. Using the PCR (reference clock information) value output from the TS decoder section 123, the clock section is set to a correct reference time, and the time that becomes the reference is counted, and the reference is used to accurately synchronize image data, audio data decoding.

In addition, once the AV decoder unit 124 receives both the image data and the audio data output from the TS decoder unit 123, it first reads out the identification of the image data and audio data written in the dedicated area according to the instruction of the reception control unit 126. character, and notify the reception control unit 126. Next, according to the instructions of the reception control unit 126, the image data and audio data are decoded every decoding unit, and are output to the playback unit 128 while being synchronized by the clock unit, and at the same time, the reception control unit 126 is notified of the completion of decoding.

2-3-4. Structure of received data storage unit 125

The received data storage unit 125 is constituted by, for example, RAM, and includes a stream correspondence information table storage unit 132 , a navigation information table storage unit 133 , and a system information table storage unit 134 .

The stream correspondence information table storage unit 132 stores the stream correspondence table separated by the TS decoding unit 132 . The navigation information table storage unit 133 stores the navigation information table separated by the TS decoder unit 123 . The system information table storage unit 134 stores system information tables such as NIT, SDT, EIT, PAT, and PMT separated by the TS decoder unit 123 .

2-3-5. Signal receiving unit 127

The signal receiving unit 127 receives a user's remote control operation and the like, and notifies the acceptance control unit 126 .

2-3-6. Replay section 128

The playback unit 128 superimposes the graphic information included in the navigation information table output from the reception control unit 126 on the image data decoded by the AV decoder unit 124 according to an instruction from the reception control unit 126, and presents the graphics information to the display unit. 129 to output the audio data decoded by the AV decoder unit 124 to the audio output unit 130 .

2-3-7. Display unit 129

The display unit 129 is realized by a CRT, a liquid crystal display, or the like, and displays an image output from the playback unit 128 . Lists 151, 152, 153, etc. shown in Fig. 49 are displayed.

2-3-8. Sound output unit 130

The audio output unit 130 is realized by a speaker or the like, and outputs the audio output from the playback unit 128 .

2-3-9. Reception control unit 126

The reception control unit 126 controls the reception unit 122 to receive the requested transport stream. And if the user's operation signal is accepted by the signal receiving section 127, then refer to the navigation information table currently stored in the navigation information table storage section 133, and set the navigation information to be separated next in the filter condition memory 131 of the TS decoder section 123. The filter conditions of the information table and the filter conditions of the stream correspondence table for acquiring image data. Separated in the TS decoder unit 123 , the filter condition of the image data is set in the filter condition storage unit 131 by referring to the stream correspondence table stored in the stream correspondence information table storage unit 132 .

The reception control unit 126 refers to the image data identifier written in the image data dedicated area, and judges whether or not the image data separated by the TS decoder unit 123 is appropriate image data. When it is appropriate image data, it is decoded by the AV decoder unit 124 and output to the playback unit 128 . If it is not suitable image data, the condition of the filter condition storage unit 131 is changed, and the separated stream correspondence table is instructed again.

Then, the bit flag data of the destination included in the navigation information table separated by the TS decoder unit 123 is read out, notified to the playback unit 128, and displayed superimposed on the image data.

2-3-9-1 Initial Control

The reception control unit 126 is composed of a CPU and a program for controlling it. When the user initially selects an event to multiplex transmission data stored in the transport stream transmitted by the transmission unit 106 of the data transmission device 101 In the transmission data storage unit 102, first, refer to the system information table according to the program determined by the MPEG2 system standard and DVB-SI standard used in the ordinary satellite digital broadcasting receiving device, and instruct the receiving unit 122 to transmit the data transmitted by the transmitting unit 106. Stream reception instructs the TS decoder unit 123 to separate the PMT corresponding to the selected event.

Then, the reception control unit 126 refers to the PMT recorded in the system information table storage unit 134 to obtain a PCR identifier, and sets it in the filter condition storage unit 131 . Furthermore, the reception control unit 126 acquires the entry list image data and the identifier of the navigation information, and sets the filter conditions of the stream correspondence table and the filter conditions of the navigation information table in the filter condition storage unit 131 respectively.

Furthermore, the reception control unit 126 refers to the PMT in the system information table storage unit 134, obtains the PID value of the part of the transport flow correspondence table and the part of the transport navigation information, and applies the filter condition and navigation information of the stream correspondence table of the filter condition storage unit 131 The filter conditions of the table are set separately, and these filter conditions are set to the start state.

The reception control unit 126 sets the filter condition of the stream correspondence table in the filter condition storage unit 131 to a stop state upon receiving the stream correspondence table separation notification by the decoder unit 123 . Next, the reception control unit 126 refers to the stream correspondence table in the stream correspondence information table storage unit 132 , reads out the value of “stream_id” of the image data, and sets the image data filter condition in the filter condition storage unit 131 . Then refer to the stream correspondence table in the stream correspondence information table storage unit 132, read the value of “component_tag”, and then obtain the PID value corresponding to the value of “component_tag” read by referring to the PMT in the system information table storage unit 134, and set As for the filter condition of the image data in the filter condition storage unit 131 , the filter condition is set to start.

2-3-9-2. Judging whether the image data is appropriate

In addition, although the data transmitting device 101 sometimes provides multiple different image data with the same value PID and Stream_id for transmission, it transmits after the stream correspondence table corresponding to a certain image data is transmitted, so that after a certain period of time, the image data has the same value than the other image data. The PID of the value and other image data of the Stream_id must appear first. Therefore, after the reception control section 126 receives the stream correspondence table, if the filter condition setting of the image data is completed within a certain period of time, the TS decoder section 123 can separate the required image data without error, and can send the required image data to the AV decoder section. 124 outputs.

Next, the reception control unit 126 acquires the image data identifier described in the dedicated area of the image data output from the TS decoder unit 123 through the AV decoder unit 124, and checks whether it matches the identification of the image data to be acquired now. According to the coincidence situation, the filter condition of the image data in the filter condition storage unit 131 is set to the stop state, and in the filter condition of the stream correspondence table, the PID of the part of the transport stream correspondence table and the identification of the image data to be obtained now are set character, set the filter condition of the flow correspondence table as the start state. Also, the value of the stream correspondence table identifier "table_id_extension" matches the value of the video data identifier "VE_id". Thus, even if the reception control unit 126 refers to the stream correspondence table and a delay occurs in the process of setting the filter condition of the image data for some reason, it is possible to prevent another wrong image from being displayed.

The reception control unit 126 refers to the stream correspondence information table storage unit 132 when the value of the identifier described in the image data dedicated area output from the TS decoder unit 123 matches the value of the image data identifier to be acquired now. The mid-stream correspondence table reads the value of "first_pts". Then, referring to the clock unit of the AV decoder unit 124, it is checked whether or not the frame decoding completion notification from the AV decoder unit 124 has come before the read “first_pts” value time. When there is no decoding end notification, the filter condition of the image data in the filter condition storage unit 131 is set to a stop state, and in the filter condition of the stream correspondence table, the partial PID of the transport stream correspondence table and the image data to be acquired now are set again The identifier of the stream correspondence table is set to the start state of the filter condition.

Thus, even if the reception control unit 126 delays in setting the filter conditions of the image data by referring to the stream correspondence table for some reason, it is possible to prevent the first image data from being disconnected and played back from the middle.

When a frame decoding completion notice is received from the AV decoder unit 124, the reception control unit 126 refers to the stream correspondence table in the stream correspondence information table storage unit 132, and reads the value of "last_pts". Then, referring to the clock section of the AV decoder section 124, when the read "last_Pts" value time is reached, the filter condition of the image data in the filter condition storage section 131 is set to stop. In this way, only required image data is separated and output to the AV decoder unit 124 . Therefore, other image data having the same PID and Stream_id are often not separated.

2-3-9-3. Generation of graphic information

Furthermore, when receiving the navigation information table separation notification from the TS decoder unit 123, the reception control unit 126 sets the filter condition of the navigation information table in the filter condition storage unit 131 to a stop state. Next, the reception control unit 126 refers to the object definition in the navigation information table in the navigation information table storage unit 133 to obtain the display coordinates "X" and "Y" of the key object, and then obtains "Focused Bitmap" for the key "0" as the search value. " index value, for keys other than that, obtain the "Normal Bitmap" index value, refer to the bit mark table, obtain the bit mark data corresponding to the index value, and at the same time, generate graphic information and output it to the playback unit 128.

2-3-9-4. Explain user operations

The reception control unit 126 initializes the variable Cur_focus indicating the retrieval value of the key object currently selected to "0".

Furthermore, upon receiving the user operation signal from the signal receiving unit 127 , the reception control unit 126 determines whether the user operation signal is “up”, “down”, or “OK”. When the user operation signal is "up" or "down", the value of the variable Cur-focus is decreased or increased by "1". Next, refer to the navigation information table in the navigation information table storage unit 133, first refer to the object definition table, obtain the display coordinates "X" and "Y" of the key object, and then obtain the index value for the key equal to the variable Cur-focus value The "FocusedBitmap" search value acquires the "Normal Bitmap" index value for keys other than that, refers to the bitmark table, acquires bitmark data corresponding to the index value, generates key pattern information together with these, and outputs it to the playback unit 128.

Moreover, when the user operation signal is "OK", the reception control unit 126 refers to the object definition table of the navigation information table NVT stored in the navigation information table storage unit 133, and the index value obtains the processing program of the key object equal to the variable Cur_focus value. The index value of , refer to the processing program definition table, and read the instruction word from the processing program corresponding to the index value. When the instruction word is in the "goto_contents" situation, read in the index index value again, refer to the high connection table, and read in the directory identifier of the connection end corresponding to the index value read in as the directory identifier for next replay.

When the command word is "goto_entry", refer to the event PMT to which the navigation information table of the currently playing content in the system information table storage unit 134 belongs, and read the entering content identifier as the content identifier to be played next.

2-3-9-5. Filter condition setting

The reception control unit 126 takes no action when the content identifier to be reproduced later is equal to the content identifier to be reproduced currently. When the contents original_network_id and transport_stream_id to be reproduced later are different from the currently received transport stream, the receiving unit 122 is instructed to receive the requested transport stream by referring to the system information table according to the procedure determined by the MPEG2 system standard and the DVB-SI standard. As an operation of the receiving unit 122, when the designated transport stream belongs to another network, processing such as changing the direction of the antenna is performed to receive the designated transport stream.

The reception control unit 126 also refers to the system information table and sets the PMT identifier of the event to which the image data of the content to be reproduced later belongs to when the event to which the image data of the content to be reproduced later is different from the event to which the video data of the content to be reproduced now is different. is stored in the filter condition storage unit 131 of the TS decoder unit 123.

The TS decoder unit 123 separates the PMTs according to filter conditions, stores them in the system information table storage unit 134 , and notifies the reception control unit 126 .

When the reception control unit 126 receives the event PMT separation notification to which the image data belongs from the TS decoder unit 123 , it refers to the PMT and sets the value of “PCR-PID” in the filter condition storage unit 131 .

In addition, when the event to which the content navigation information to be reproduced later belongs is different from the event to which the content navigation information to be reproduced now belongs, the reception control unit 126 also refers to the system information table, and sets the event to which the content navigation information to be reproduced later belongs. The PMT identifier is set in the filter condition storage unit 131 of the TS decoder unit 123 . When the value of the identifier "VE_id" of the content video data to be reproduced later is different from the value of the identifier "VE_id" of the content video data to be reproduced now, the reception control unit 126 refers to the content to be reproduced later in the system information table storage unit 134. The event PMT to which the image data belongs obtains the PII attached to the VE_Information Component_Descriptor, and sets it together with the "VE_id" value as the filter condition of the stream correspondence table in the filter condition storage unit 131, and makes this condition a start state.

When the value "NE_id" of the identifier "NE_id" of the navigation information identifier of the content to be reproduced later by the reception control unit 126 is different from the value of the identifier "NE_id" of the currently reproduced content navigation information, the system information table storage unit 134 is referred to and reproduced. The PMT of the event to which the directory navigation information belongs, obtains the PID of the part attached to the NE_component_Descriptor, sets it together with the value of "NE_id" as the navigation information table filter condition in the filter condition storage unit 131, and sets the filter condition as the start state .

2-3-10. Specific example of directory display in data receiving device 121

For example, when the user initially selects such an event, the original_network_id, transport_stream_id, service_id, and event_id multiplexed in the transport stream 1801 in FIG. The procedure for determining the SI specification refers to NITI 301 shown in FIG. 66A , obtains transport elements such as “0X001” to identify the frequency of the transport stream 1801 of Original_network_id and transport_Stream_id, and instructs the receiving unit 122 to receive the transport stream 1801. Also refer to FIG. 67 In the PAT1401 shown, "program_no" is equal to the Service_id value, that is, the PID value "0X0080" of the PMT of the "0X000" program is obtained, and this is set as the filter condition of the PMT in the filter condition storage unit 131.

The TS decoder unit 123 separates the PMT 1501 shown in FIG. 68, stores it in the system information table storage unit 134, and notifies the reception control unit 126. The reception control unit 126 reads out the “PCR-PID” value “0X0081” from the PMT 1501 stored in the system information table storage unit 134, and sets it as the PCR filter condition in the filter condition storage unit 131. Next, the reception control unit 126 refers to the Entry_Descriptor shown in FIG. 69A in the PMT 1501, extracts the "entry_VE_id" value "0X0005", and sets it as the filter condition "table_id_extension" of the stream correspondence table in the filter condition storage unit 131. Then, the reception control unit 126 acquires the PID value "0X0083" of the part added to the VE_Information_Component_Desoripor from the PMT 1501, sets it as the "PID" of the flow correspondence table filter condition similarly, and sets the flow correspondence table filter condition to start state.

Then, the reception control unit 126 refers to the Entry_Descriptor shown in FIG. Next, the reception control unit 126 acquires the PID value "0X0082" added to the NE-component_Descripor from the PMT 1501, similarly sets it as the "PID" of the filter condition of the navigation information table, and sets the filter condition of the navigation information table as the start state.

The decoder unit 123 separates the stream correspondence table 1201 shown in FIG. 63A, stores it in the stream correspondence information table storage unit 132, notifies the reception control unit 126, and simultaneously separates the navigation information table 1001 shown in FIG. 61 and stores it in the navigation information table 1201. The table storage unit 133 notifies the reception control unit 126 . When the reception control unit 126 receives the stream correspondence table separation notification, it refers to the stream correspondence table 1201 of the stream correspondence information table storage unit 132, obtains the value “0XE5” of the “stream_id”, and sets it in the filter condition storage unit 131 as image data filter The "stream_id" of the condition. Next, obtain "0X00" after "Component_tag" from the stream correspondence table 1201, then refer to the PMT1501 in the system information table storage unit 134, add the "Component_tag" value to the Stream_identifier_descriptor of "0X00", and obtain the transmitted data type as image data The part "PID" value "0X0084" is set as the image data filter condition "PID" in the filter condition storage unit 131, and the filter condition is put into a start state.

In addition, when replacing the "Component_tag" value in the stream correspondence table with the "PID" value directly, the reception control unit 126 acquires "Stream_id" and "PID" from the stream correspondence table without referring to the PMT, and sets the filter condition storage unit Image data filtering conditions in 131.

The TS decoder unit 123 separates the bit stream 901 of image data shown in FIG. 60 and outputs it to the AV decoder unit 124 . The image data bit stream 901 writes the "VE_id" value "0X0005" in the dedicated area of the still image data 201 shown in FIG. 53A.

The reception control unit 126 receives a notification from the AV decoder unit 124 of the identifier value “0X0005” written in the area dedicated to the separated image data, and confirms that it matches the value “0X0005” previously set in the stream correspondence table tabl_id_extension. Then, while referring to the clock section of the AV decoder section 124, once the success notification that the image data has been successfully decoded by the AV decoder section 124 is confirmed before the "first_pts" value "112500" in the stream correspondence table 1201, the stream correspondence is waited. When the value of "last_pts" in the table 1201 is "112500", the image data filter condition of the filter condition storage unit 131 is set to stop.

Also, once the reception control unit 126 receives the navigation information table separation notification, it first sets the variable Cus_focus to “0”, refers to the navigation information table 1001 of the navigation information table storage unit 133, and acquires the key display corresponding to the index value “0”. Coordinates, bit flag data corresponding to the index value of "Focused Bitmap", key display coordinates corresponding to the index value "1", bit flag data corresponding to the index value of "Normal Bitmap", generate key graphic information to the heavy output from the output unit 128. The reproduction unit 128 superimposes the graphics information output from the reception control unit 126 on the image data output from the AV decoder unit 124, and displays an image 2301 shown in FIG. 75A on the display unit 129.

In the state where the display image 2301 is displayed, when the user inputs a "down" signal using an operating member such as a remote control, the reception control unit 126 first receives a notification of the input "down" through the signal receiving unit 127, and increases the value of the variable Cur_forcus by "" 1" is set to "1". Next, referring to the navigation information table 1001 of the navigation information table storage unit 133, the key display coordinates corresponding to the index value "0", the bit flag data corresponding to the index value "Normal Bitmap", and the key display coordinates corresponding to the index value "1" are obtained. The key display coordinates and the bitmark data corresponding to the index value of "Foused Bitamap" generate key pattern information and output it to the playback unit 128. The playback unit 128 superimposes the graphics information output from the reception control unit 126 on the image data output from the AV decoder unit 124, and displays a display image 2302 shown in FIG. 75B on the display unit 129.

In addition, in the state where the display image 2301 is displayed, when the user inputs an "OK" signal using an operating member such as a remote control, the reception control unit 126 receives a notification of the input signal "OK" through the signal receiving unit 127, and obtains a navigation information table storage unit. The navigation information table 1001 target definition table 1002 index value of 133 is the key handler index value "0" of the variable Cur_focus value "0", referring to the handler definition table 1003, and obtaining the original instruction word "goto_contents" corresponding to the index value "0" ” and its index value of “0”.

Next, the receiving control unit 126 refers to the high connection table 1004, extracts the value “0X0001” of the connection end directory “VE_id” corresponding to the index value “0”, and sets it as the “table_id_extension” of the filter condition of the flow correspondence table in the filter condition storage unit 131 . Then, the reception control unit 126 acquires the PID value "0X0083" of the part added to the VE_Information_Component_Deseripor from the PMT 1501, and also sets it as the "PID" of the flow correspondence table filter condition, and sets the flow correspondence table filter condition as a start state.

Then the reception control unit 126 fetches the “NE_id” value “0X0001” of the connection end list corresponding to the index value “0”, and sets it as the “table_id_extension” of the navigation information table filter condition in the filter condition storage unit 131 . The reception control unit 126 acquires the PID value "0X0082" of the part added to the NE_Component_Descripor from the PMT 1501, and also sets it as the "PID" of the navigation information table filter condition, and sets the navigation information table filter condition as the start state.

The TS decoder unit 123 separates the stream correspondence table 1202 shown in FIG. 63B, stores it in the stream correspondence information table storage unit 132, and notifies the reception control unit 126, and simultaneously separates the navigation information table 1101 shown in FIG. 62 and stores it in the stream correspondence information table storage unit 132. In the navigation information table storage unit 133 , the notification reception control unit 126 is notified.

When receiving the separation notification from the stream correspondence table of the TS decoder 123 , the reception control unit 126 refers to the stream correspondence table 1202 and instructs the separation of the image data to the TS decoder 123 . Then, upon receiving a separation notification from the navigation information table from the TS decoding unit 123 , it refers to the navigation information table 1101 to generate key pattern information, and outputs it to the reproduction unit 128 .

The playback unit 128 superimposes the graphics information output from the reception control unit 126 on the image data output from the AV decoder unit 124, and displays a display image 2303 shown in FIG. 75c on the display unit 129.

Moreover, in the state where the display image 2301 is displayed, when the user inputs a "OK" signal by using an operating part such as a remote control, the reception control unit 126 receives a notification of the input signal "OK" through the signal receiving unit 127, and refers to the navigation information table to store the "OK" signal. The navigation information table 1101 of the unit 133 acquires the original command word "goto_entry". Next, the reception control unit 126 fetches the “entry_VE_id” value “0X0005” from the PMT 1501 stored in the system information table storage unit 134, and sets it as the “table_id_extension” of the flow correspondence table filter condition in the filter condition storage unit 131.

Then, the reception control unit 126 acquires the value "0X0083" of the PID added to the VE_Information_Component_Descrpor from the PMT 1501, similarly sets the "PID" of the filter condition of the stream correspondence table, and sets the filter condition of the stream correspondence table to the start state.

The reception control unit 126 refers to the PMT 1501, extracts the “entry_NE_id” value “0X0005”, and sets the navigation information table filter condition “table_id_extension” in the filter condition storage unit 131. Furthermore, the reception control unit 126 acquires the PID value "0X0082" of the part added to the NE_Component_Descripor from the PMT 1501, similarly sets the "PID" of the filter condition of the navigation information table, and sets the filter condition of the navigation information table to the start state.

The TS decoder unit 123 separates the stream correspondence table 1201 shown in FIG. 63A, stores it in the stream correspondence information table storage unit 132, and notifies the reception control unit 126, and at the same time separates the navigation information table 1001 shown in FIG. 61 and stores it in the on the navigation information table storage unit 133 . The reception control unit 126 is notified.

When the reception control unit 126 receives the stream correspondence table separation notification from the TS decoder unit 123 , it refers to the stream correspondence table 1201 and indicates to the TS decoder unit 123 that the image data is separated. Then, upon receiving notification of separation of navigation information from the TS decoder unit 123 , it refers to the navigation information table 1001 to generate key pattern information, and outputs it to the playback unit 128 .

The reproduction unit 128 superimposes the graphics information output from the reception control unit 126 on the image data output from the AV decoder unit 124, and displays a display image 2301 shown in FIG. 75A on the display unit 129.

2-3-11. Operation of the data receiving device 121

Next, the operation of the data receiving device 121 will be described using the flow charts shown in FIGS. 76 to 79 .

2-3-11-1. Overall work

First, the overall operation of the data receiving unit 121 will be described with reference to FIG. 76 .

The receiving control unit 126 is connected to the power supply of the data receiving device 121 by the user, then according to the program determined by the MPEG2 system standard and the DVB-SI standard, controls the receiving unit 122 and the TS decoder unit 123, receives the system information table, and uses the repeated The playback unit 128 displays a program list on the display unit 129, and the user selects a program using an operating member such as a remote control. When the selection signal from the operation member is notified through the signal receiving unit 127, an event that multiplexes the transmission data stored in the transmission data storage unit 102 in the transmission stream that is transmitted by the transmission unit 106 of the data transmission device 101 is selected. Transmit to obtain its event identifier, Original_network_id, transport_stream_id, Service_id, event_id (S2402).

When the reception control unit 126 selects an event to multiplex the transmission data stored in the transmission data storage unit 102, it refers to the system information table and instructs the reception unit 122 to transmit data according to the procedure specified by the MPEG2 system standard and the DVB-SI standard. Receiving the transport stream transmitted by the unit 106 instructs the TS decoder unit 123 to separate the PMT corresponding to the selected event. The receiving unit 122 receives the transport stream transmitted from the transmitting unit 106 and outputs it to the TS decoder unit 128 . The TS decoder unit 123 separates the PMT corresponding to the selected event, reads it into the system information table storage unit 134 of the reception data storage unit 125 , and notifies the reception control unit 126 . Upon receiving the PMT reception notification from the TS decoder unit 123, the reception control unit 126 refers to the PMT in the system information table storage unit 134, obtains the PCR PID, and stores it in the filter condition storage unit 131 (S2404).

The reception control unit 126 sets the Original_network_id of the event selected in the variable Cur_Original_network_id, sets the transport_Stream_id of the event selected in the variable Cur_transport_stream_id, sets the service Service_id selected in the variable Cur_VE_Service_id and the variable Cur_NE_Service_id, and sets it in the variable Cur_VE_event_id and the variable The event_id of the event selected in Cur_NE_event_id, clears the variable Cur_VE_id and the variable Cur_NE_id. These variables represent the directory identifier information currently being reproduced (S2406). Next, the reception control unit 126 sets the event original_network_id selected in the variable new_original_network_id, sets the event transport_Stream_id selected in the new_transport_stream_id, sets the service Service_id selected in the new_VE_Service_id and the variable new_NE_Service_id, sets the event_id of the event selected in the variable new_VE_event_id and the variable new_NE_event_id, In the variable new_VE_id and the variable new_NE_id, refer to the PMT in the system information table storage unit 134, and set the values of entry_VE_id and entry_NE_id, respectively (S2408).

Next, the reception control unit 126 performs directory replacement processing, and the directory switching processing will be described in detail later (S2410).

Next, the reception control unit 126 clears the directory change flag indicating that directory switching is necessary (S2412).

Then, the reception control unit 126 waits for the signal input of the user's selection operation notified by the signal reception unit 127 (S2414). If there is a signal input from the signal receiving unit 127, the reception control unit 126 performs signal processing on the user input. The details of the user input signal processing (S2416) will be described later. Next, the reception control unit 126 judges whether "1" is set in the directory change flag (S2418), and if "1" is set, it returns to S2110, and if not, it returns to S2414.

2-3-11-2. Directory switching processing

The details of the switching process of the directory in S2410 will be described using the flow chart of FIG. 77 .

First, the reception control unit 126 judges whether the values of the variables new_Original_network_id and Cur_Original_network_id stored in itself are the same, and also judges whether the values of the judgment variables new_transport_Stream_id and Cur_transport_Stream_id are the same (S2502). If it is affirmative, the image data switching process (S2504) and the navigation information switching process (S2506) are performed simultaneously, and the process is terminated. When negative, referring to the system information table, to the switching process (S2508) of the transport stream identified by the variable new_Original_network_id and the variable new_transport_Stream_id, the value of new_orginal_network_id is set in the variable Cur_Original_network_id, the value of new_transport_Stream_id is set in the variable Cur_transport_stream_id, and the variable Cur_VE_service_id, clear variable Cur_VE_service_id, Variable Cur_VE_event_id, variable Cur_VE_id, variable Cur_NE_Service_id, variable Cur_NE_event_id, variable Cur_NE_id (S2510). The use image data switching process (S2504) and the navigation information switching process (S2506) are performed simultaneously, and the process is terminated.

2-3-11-3. Image data switching processing

Next, the switching process of image data at S2504 will be described in detail with reference to the flowchart of FIG. 78 .

The reception control unit 126 judges whether the values of the variables new_VE_Service_id and Cur_VE_service_id stored in itself are the same, and also judges whether the values of the variables new_VE_event_id and Cur_VE_event_id are the same (S2602). If affirmative, determine whether the values of the variable and new_VE_id and Cur_VE_id are the same (S2604), if affirmative, terminate the process, and if negative, go to S2610. When the determination in S2602 is negative, it refers to the system information table corresponding to the variables new_VE_Service_id and new_VE_event_id, and instructs the TS decoder unit 123 to separate the PMT of the event identified by the new_VE_Service_id and the variable new_VE_event_id. The TS decoder unit 123 separates the designated PMT, writes it into the system information table storage unit 134 of the reception data storage unit 125 , and notifies the reception control unit 126 of it. Upon receiving the separation notification from the PMT, the reception control unit 126 refers to the PMT to obtain the PID of the PCR, and sets it in the filter condition storage unit 131 (S2606). The reception control unit 126 sets the value of the variable new_VE_Service_id in the variable Cur_VE_id, and sets the value of the variable new_VE_event_id in the variable Cur_VE_event_id (S2608).

The reception control unit 126 refers to the PNT of the event identified by the variables Cur_VE_Service_id and Cur_VE_event_id in the system information table storage unit 134, obtains the PID of the directory added to the VE_Information_Component_Descriptor, sets the value of the variable new_VE_id as table_id_extension in the stream correspondence table filter condition, Set this filter condition to start state. The TS decoder unit 123 separates the stream correspondence table VET corresponding to the variable new_VE_id value from the transport stream according to the filter condition, stores it in the stream correspondence information table storage unit 132, and notifies the reception control unit 126 (S2610).

The reception control unit 126 interprets the stream correspondence table VET acquired in S2610 in the stream correspondence information table storage unit 132, sets the value "first_pts" in the variable first PTS, sets the value "last_pts" in the variable last PTS, and acquires "Sfream_id". and "Component_tag" value (S2612). The reception control unit 126 initializes the flag indicating whether or not the decoding of the first frame of the image data has been completed to "0" (S2614).

The reception control unit 126 refers to the PMT corresponding to the event identified by the variables Cur_VE_Service_id and VE_event_id in the system information table storage unit 134, the type of data to be transmitted is image data, and the PID of the part obtained is added to the "Component_tag" in S2612. On the Stream_identifier_descriptor with the obtained "Component_tag" value equal to the "Stream_id" value obtained in S2612, it is set in the filter condition of the image data in the filter condition storage unit 131, and the filter condition is set to the start state. The TS decoder unit 123 separates the image data according to the filter condition, and outputs it to the AV decoder unit 124 (S2616).

The reception control unit 126 instructs the AV decoder unit 124 to obtain the image data identifier value described in the image data dedicated area separated by the TS decoder unit 123, and compare it with the value of the variable new_VE_id (S2618). If they match, move to S2620, and if they don't match, move to S2619.

The reception control unit 1262 sets the filter condition of the image data in the filter condition storage unit 131 to the stopped state (S2619), and returns to S2610.

When the decoding of the image data output from the TS decoder unit 123 is completed, the AV decoder unit 124 notifies the reception control unit 126 of the completion of decoding. The reception control unit 126 determines whether or not to receive the notification of the end (S2620). When receiving, move to S2622, otherwise move to S2624.

The reception control unit 126 sets a value of "1" in the flag first_flag (S2622)

The reception control unit 126 refers to the value of the clock unit of the AV decoder unit 124 to obtain the current time in units of 90000ths of a second, and compares it with the value of the variable first PTS (S2624). When the current time value is above firstPTS, it moves to SZ626, and when it is less than firstPTS, it moves to S2628. The reception control unit 126 judges whether or not the value of the flag first_flag is "1" (S2626). If it is "0", the process proceeds to S2619, and if it is "1", the process proceeds to S2628.

At S2628, the reception control unit 126 refers to the clock unit value of the AV decoding unit 124 to acquire the current time in units of 90000th of a second, and compares it with the variable last PTS value. When the current time value is more than the variable lastPTS, the filter condition of the image data in the filter condition storage unit 131 is set to a stop state (S2630), and the variable new_VE_id value is set in the variable Cur_VE_id (S2632), and the image data playback ends Processing, return to S2620 when the current time value is less than the variable last PTS.

2-3-11-4. Navigation information switching processing

Next, the navigation information switching process of S2506 will be described in detail using the flowchart of FIG. 79 .

The reception control unit 126 judges whether the values of the variables new_NE_Service_id and Cur_NE_Service_id stored in itself are the same, and whether the values of the variables new_NE_event_id and Cur_NE_event_id are equal (S2702). If they are equal, it is judged whether the values of variables new_NE_id and Cur_NE_id are equal (S2704), if they are equal, the processing is terminated, and if they are not equal, the process goes to S2706. If the determination in S2702 is negative, the system information table corresponding to the variables new_NE_service_id and new_NE_event_id is referred to, and the separation of the PMT corresponding to the event identified by the variables new_NE_Service_id and variable new_NE_event_id is instructed to the TS decoder unit 123 . The TS decoding unit 123 separates the specified PMT, records it in the system information table storage unit 134 of the reception data storage unit 125, and notifies the reception control unit 126 (S2708).

The reception control unit 126 sets the value of the variable new_NE_Service_id in the variable Cur_NE_Service_id, and sets the value of the variable new_NE_event_id in the variable Cur_NE_event_id (S2710).

In S2706, the reception control unit 126 refers to the PMT corresponding to the event identified by the variables Cur_NE_Service_id and Cur_NE_event_id in the system information table storage unit 134, obtains the directory PID attached to the NE_Component_Descriptor, sets the value of the variable new_NE_id as table_id_extension, and sets it as the filter condition The filter condition of the navigation information table in the condition storage unit 131 is stored, and the filter condition is set to the start state. The TS decoder unit 123 separates the navigation information table NVT corresponding to the value of the variable new_NE_id from the transport stream according to the filter condition, records it in the navigation information table storage unit 133, and notifies the reception control unit 126 (S2706).

The reception control unit 126 refers to the object definition table of the navigation information table NVT acquired in S2706 in the navigation information table storage unit 133, acquires the display coordinates "X" and "Y" of the key object, and then acquires the index of "Normal Bitmap". value, refer to the bit flag table, obtain bit flag data corresponding to the index value, generate key graphic information based on these, and output to the playback unit 128 . The reproducing unit 128 superimposes the graphics information on the image data decoded by the AV decoding unit 124, and displays it on the display unit 129 (S2712).

The reception control unit 126 initializes the variable Cur_focus indicating the key object index value in the currently selected state to "0" (S2714). The reception control unit 126 refers to the object definition table of the navigation information table NVT obtained in S2706, obtains the key object display coordinates "X" and "Y" whose index value is equal to the variable Cur_focus value, and then obtains the index value of "Focused Bitmap", and refers to the bitmap The flag table acquires bit flag data corresponding to the index value, and generates key object graphic information that sets the key bit flag having the index value corresponding to the variable Cur_forcus value to the selected state based on these, and outputs it to the playback unit 128 . The playback unit 128 superimposes the graphic information on the image data decoded by the AV decoder unit 124, displays it on the display unit 129 (S2716), sets the variable new_NE_id value in the variable Cur_NE_id (S2718), and terminates the switching of the navigation information. deal with.

2-3-11-5. User input signal processing

Next, the processing related to the user input signal will be described with reference to the flowchart of FIG. 80 .

The reception control unit 126 determines whether or not the user input notified from the signal reception unit 127 is an “up” signal. If it is an "up" signal, move to S2804, if not, move to S2808 (S2802). In S2804, the reception control unit 126 decrements the value of the variable Cur_focus by "1". But when the variable Cur_focus value is "0", it still remains "0".

The reception control unit 126 refers to the object definition table of the navigation information table NVT obtained in S2706 stored in the navigation information table storage unit 133, and obtains the display coordinates "X" and "Y" of the key object whose target value is equal to the value of the variable Cur_forcus. ", then obtain the index value of "Focused Bitmap", refer to the bit mark, obtain the bit mark data corresponding to the index value, according to these, set the key bit mark with the index value corresponding to the variable Cur_focus value as the bit of the selected state flag, and similarly generate key object graphic information in which the key bit flag corresponding to the index value of the variable Cur_forcus value is set to the bit flag of the normal state, and outputs it to the playback unit 128 . The reproduction unit 128 superimposes the graphics information on the number of images decoded by the AV decoder unit 124, displays it on the display unit 129 (S2806), and terminates the user input process.

In S2808, the reception control unit 126 determines whether or not the user input notified from the signal reception unit 127 is a “down” signal. If it is a "down" signal, go to S2810, if not, go to S2812. In S2810, the reception control unit 126 increments the value of the variable Cur_focus. However, when the value of the variable Cur_forcus is equal to the maximum value of the key object identifier in the navigation information table NVT, it still moves to S2806.

In S2812, the reception control unit 126 judges whether or not the user input of the notification from the signal reception unit 127 is an “OK” signal. If so, move to S2814; otherwise, the user input processing is terminated.

In S2814, the reception control unit 126 refers to the object definition table of the navigation information table NVT, acquires the processor index value of the key object whose index value is equal to the variable Cur_focus value, refers to the processor definition table, and reads in instruction word. Enter S2818 when the instruction word is "goto_contents", otherwise enter S2824 (S2816).

In S2818, the reception control unit 126 reads the index value of the argument of the goto_contents instruction through the processor.

The reception control unit 126 refers to the highly connected table of the navigation information table, and sets the values of Original_network_id, transport_Stream_id, VE_service_id, VE_event_id, VE_id, VE_service_id, NE_erent_id, and NE_id of the directory identifier corresponding to the index value read in S2818 to Defined as variables new_orignal_network_id, new_transport_Stream_id, new_VE_service_id, new_VE_event_id, now_VE-id, new_VE_Service_id, new_NE_event_id, new_NE_id. However, no value is set in the high connection table, that is, the original value is not changed for each identifier of "-" (S2820).

The reception control unit 126 sets the value of the directory change flag to "1" (S2822), and ends the user signal processing.

In S2824, the reception control unit 126 determines whether the original command word is "goto_entrg", and if not, terminates the user signal processing. If it is "goto_entry", the reception control unit 126 refers to the PMT corresponding to the event identified by the variables Cur_NE_Service_id and Cur_NE-event_id in the system information table storage unit 134, and sets the values of "entry_VE_id" and "entry_NE_id" as variables new_VE_id, variable new_NE_id, set the values of variables Cur_NE_Service_id and variable Cur_event_id to variable new_VE_service_id and variable new_NE_event_id respectively (S2826), and proceed to S2822.

As described above, according to the user's operation, the display of the display image 2301 shown in FIG. 75A is switched to the display image 2303 shown in FIG. 75C and returns to the original position.

2-3-12. Summary

As described above, the data receiving device 121 of the present embodiment can extract presentation information and navigation information necessary for playback of a specific content from the transport stream as necessary. In this way, according to the user's operation, it is possible to appropriately reproduce the content of the connection terminal, etc., and to provide interactive programs according to the user's operation using the one-way channel.

In addition, in the data receiving device 121 of this embodiment, the receiving unit 122, the TS decoder unit 123, the AV decoder unit 124, the playback unit 128, the display unit 129, the sound output unit 130, and the signal receiving unit 127 may be Use the same structure as the existing digital broadcast television equipment.

Therefore, only the reception control unit 126, the reception data storage unit 125, etc. described above can be simply added to the reception unit, TS decoder unit, AV decoder unit, etc. constituting the existing digital broadcast receiving device. The object of the present invention is the program dialogue function.

And, since these existing structures can be applied unchanged, it is also possible to realize the compatibility of forming the usual digital satellite broadcast receiving function and the program dialogue function which is the object of the present invention.

2-3-13. Others

2-3-13-1.

In addition, in this embodiment, although the example in which the image data is all still images has been described, even when the image data is a moving image, the data receiving device 121 can reproduce it in the same manner as in the present embodiment.

Also, in this embodiment, an example is described using a set of content image data and navigation information, but audio data may also be grouped. In this case, the reception control unit 126 performs switching processing of the audio data simultaneously with the switching processing of the image data, and outputs the audio data to the audio output unit 130 , as long as the configuration is as described above. Audio data switching processing can be realized by the same method as image data switching processing.

In this embodiment, although an example is shown in which the script describing the operation of the data receiving device 121 included in the processor definition table in the navigation information is only a simple script instructing directory switching, it may also be composed of multiple instruction words. complex original.

For example, when the program is "shopping information", the script for calculating the total amount of the goods selected by the viewer in the script may also be described.

Therefore, it can be realized by having an original execution function in the reception control unit 126 of the data reception device 121 . According to this function, the total amount is calculated, and the result is output to the playback unit 128, and only needs to be displayed on the display unit 129.

In addition, in this shopping, the original of the product order may be recorded. For this reason, by connecting the modem (not shown) of the data receiving device 121 originally connected to the telephone line, for example, to the computer system of the seller, it is only necessary to make a catalog for transmitting the necessary data for ordering the desired commodity. With such a structure, the user can actually order the product while confirming the total price of the ordered product while looking at the product.

3rd embodiment

In this embodiment, a description will be given of a digital broadcasting apparatus capable of realizing a dialogue program in which a stream-based content and a page-based content coexist.

3-1. Digital broadcasting device 8101

Fig. 81 is a block diagram showing the configuration of a digital broadcasting apparatus. In this digital broadcasting device 8101, the same reference numerals as those in the digital broadcasting device 5101 in FIG. 4 and the data transmitting device 101 in FIG. 52 denote the same components, so descriptions thereof are omitted, and differences will be mainly described below.

Compared with the data transmission device 101 shown in FIG. 52, the digital broadcasting device 8101 is mainly different in that the data multiplexing unit 5103 shown in FIG. 4 is added. The following description will focus on the differences.

The transmission data storage unit 102 stores data (presentation information and navigation information) of the stream-based content and the page-based content. Furthermore, the structure information storage unit 109 stores a structure information table for a stream base directory and a structure information table for a page base directory.

The data multiplexing unit 5103 multiplexes the stream-based content data stored in the transmission data storage unit 102 . Furthermore, the data multiplexing unit 103 multiplexes the page-based content data (presentation information and navigation information) stored in the transmission data storage unit 102 .

The details of the data multiplexing units 5103 and 103 have already been described in the first and second embodiments.

The transmitting unit 106 multiplexes and transmits the multiplexed streams from the two data multiplexing units 5103 and 103 into the transport stream.

3-1-1. Structure information table

82A and 82B respectively show the structure information table 8201 for the stream base directory and the structure information table 8301 for the page base directory stored in the structure information storage unit 109 in this case.

In the structure information table 8201 , each image data having the file names “Video100, m2v”, “Video104.m2v”, and “Video106, m2v” recorded in the “image data” column is stored in the presentation information storage unit 107 . Schematic diagrams of moving image data "Video100.m2v", "Video104.m2v", and "Video106.m2v" are shown in FIGS. 84A to 84C. As shown in these figures, the video data "Video100, m2v" represent a world travel guide, and are shared by the contents 100S to 103S in FIGS. 1 to 3 . The video data "Vide100, m2v" represent a world travel guide, and are shared by the contents 100S to 103S in FIGS. 1 to 3 . The moving image data "Video104.m2v" represents a Japanese travel guide, and is shared among the contents 104S, 105S, 105S', and 105S" in Figs. 1 to 3. The moving image data "Video106.m2v" (other figures) represent a Chinese travel guide respectively .

The same applies to the "sound data" column.

Navigation information having a file name “Navi100-0, nif . . . ” described in the “Navigation Information” column is stored in the navigation information storage unit 108 . 85 and 86 show the correspondence between the navigation information in the structure information table 8201 and the scenes in FIGS. 1 to 3 . Figure 85 and Figure 86 use the A-A' line for left and right continuity.

Furthermore, the structure information of the directory numbers 100 to 104 in the structure information table 8201 indicates the directories 100S to 104S in FIGS. 85 and 86 . These catalog numbers and catalogs are examples of a one-to-one correspondence.

For example, in the catalog number 100 column, specify image data "Video100.m2v", sound data "Audio100.m2a", navigation information "Navi100-0.nif, Navi100-1.nif, Navi100-2.nif, ... "

The moving image data "Video100.m2v", as shown in Fig. 84A, represents travel guidebooks for various countries in the world such as China, Japan, and Egypt. Here is the moving image that becomes the basis of the list 100S in FIG. 1 .

“Audio100.m2a” is the name of one audio data file stored in the presentation information storage unit 107 . The audio data "Audio100.m2a" together with the moving image data "Video100.m2v" represent the audio guiding the maps of the world.

The navigation information "Navi100-0.nif" indicates a main menu for the China travel guide scene including the scene 100S1 shown in FIG. 85 in the moving image data "Video100.m2v". The navigation information "Navi100-1.nif" is the main menu for the Japan travel guide scene including the scene 100S2. The navigation information "Navi100-2.nif" is the main menu for the Egyptian travel guide scene.

Based on these information, the structure information of catalog number 100 represents the data of 100 of the world travel guide (with main menu) shown in FIGS. 1 to 3 .

And, the structure information of the directory number 105 in the structure information table 8201 represents the directory 105S, 105S', 105S" in Fig. 3) Example. That is, the navigation information "Navi105-1.nif" corresponds to the catalogs 105S, 105S', and 105S" through the original used to switch the display of key objects and text information. The display switching of key objects and text information generated according to the original is the same as in the first The description in the implementation form is the same.

The configuration information table 8301 in FIG. 82B is the same as that shown in FIG. 56 in the second embodiment. The image data and audio data specified in the structure information table 8301 are stored in the presentation information storage unit 107 , and the navigation information is stored in the navigation information storage unit 108 .

The dialog program shown in the structure information table 8301 is added to the page base table of contents showing the weather forecast for Japan shown in the second embodiment, so as to include the page base table of contents showing the weather forecast for the world. Contents 100P create world weather forecast (with main menu for country selection). Furthermore, the entry information stored in the configuration information storage unit 109 specifies the directory number 100, that is, the stream base directory 100S.

85 and 86 are included in the catalog shown in the structure information table 8301, especially the catalog 104 is equivalent to representing the Japanese weather forecast of catalog number 5 shown in the second embodiment (with a directory of the main menu). However, it is slightly different from the navigation information (FIG. 54) of the directory number 5 in the second embodiment, and a link to the stream-based directory is added. Fig. 83 shows navigation information of catalog number 5 in this embodiment. The high connection to catalog number 100 is supplemented in said figure in comparison with FIG. 54 .

3-1-2. Navigation information

Since the detailed description of the navigation information has already been carried out in the first and second embodiments, the relevant parts in Figs. 85 and 86 will be described here.

Fig. 87 shows a specific example of the navigation information "Nari100-n.nif". This is used here for the China Travel Guide scene including the scene 100S1 of FIG. 85 . The navigation information "Navi100-0.nif" describes three key objects in the object definition table. These three key objects correspond to the keys of "Details", "Weather", and "China" in scene 100S1 in FIG. 85 . In order to describe in the high connection table, the "detailed" key designates the directory number 101 (the directory 101S) as the connection destination. The "weather" key specifies the directory number 10 (the directory 100P shown by the arrow line in Fig. 85) as the connection terminal. The "China" key specifies catalog number 106 as the connection terminal. In addition, although the catalog number 106 is not shown in FIG. 85 , it is a catalog used in the China travel guide including the above-mentioned moving image data "Video106.m2v".

Fig. 88 shows a specific example of the above-mentioned navigation information "Navi100-1nif". It is the same as the navigation information "Navi100-0.nif", but the "China" key is changed to the "Japan" key. The connection end is also changed from catalog number 106 to catalog number 104 (list 104S in FIG. 85 ). The reason for this is that the moving image data list reflecting the revised list 100S is shifted from the Chinese travel guide scene to the Japanese travel guide scene.

Similarly, Figure 89 shows navigation information "Navi100-2.nif", Figure 90 shows navigation information "Navi101-1.nif", Figure 91 shows navigation information "Navi101-2.nif", and Figure 92 shows navigation information "Navi102-1 .nif", Fig. 93 shows the navigation information "Navi103-1.nif", and Fig. 94 shows the navigation information "Navi104-1.nif".

Furthermore, FIG. 95 shows a specific example of the navigation information "Navi105-1.nif". The navigation information "Navi105-1.nif" realizes the switching of the directories 105S, 105S', 105S" in Fig. 85 in one navigation information according to the original. The original switching is the same as that in Fig. 48 in the first embodiment already described.

For example, the "traffic" key of the directory 105S for the processor index value 0 is originally activated, and the "transportation", "accommodation", "return" key and "Nara's" image (target index value 0～3) are eliminated, and "go to Nara" is displayed. 'traffic' image and 'return' key (target index value 4.5). Thereby switching from directory 105S to 105S'.

And, the processor index value 3 is originally activated by the "return" key of the directory 105S, and the image of "traffic to Nara" and the "return" key (target index value 4.5) are eliminated, and "traffic", "accommodation", "return" are displayed. " key (target index value 0~3). Thereby, the directory 105S' is switched to 105S.

3-1-3. Navigation information table

The navigation information is converted into a navigation information table by the navigation information table generation unit 5111 or the navigation information table generation unit 113 .

The navigation information table generators 5111 and 113 are the same as the first and second embodiments to generate additional navigation information tables, and when the directory number of the connection end is the stream-based directory, add "VE-Comptag", "AE_Comp_tag", and "NE_id" in the high-connection table Set the name identifier in the column, and set the name identifier for the "VE_id", "AE_id", and "NE_id" columns in the high-link table when the directory number of the connection end is the page base directory.

Fig. 96 shows the navigation information table NVT (104.1) generated by the above-mentioned navigation information "Navi104-1.nif". The navigation information table NVT (104.1) replaces the hyperlink table directory number in "Navi104-1.nif" with various identifiers.

The column of the high connection index value 0 in the figure is replaced with the values of "VE_comp_tag", "AE_comp_tag", and "NE_id" corresponding to the directory number 105 because the connection end is the stream directory 105S. The column of the high connection index value 2 is similarly replaced with the values corresponding to "VE_comp_tag", "AE_comp_tag", and "NE_id" of the catalog number 100 .

The high link index value 1 column is replaced with the values of "VE_id", "AE_id", and "NE_id" corresponding to the directory number 5 because the link destination is the page base directory 5 (directory 104P). However, since the number of sounds is not included, this directory is omitted.

3-1-4. Multiplexing

The presentation information and navigation information described above are multiplexed by the data multiplexing unit 5103 and the data multiplexing unit 103 .

The data multiplexing unit 5103 multiplexes the stream base directory based on the configuration information table 8201 as in the first embodiment. The data multiplexing unit 103 multiplexes the page base directory based on the structure information table 8301 as in the second embodiment. Do both at the same time.

Also, the transmission unit 106 multiplexes the stream-based content and the page-based content into the transport stream and transmits them.

FIG. 97 is an explanatory diagram showing a transport stream multiplexed by the transmission unit 106. FIG. In FIG. 29, as in FIG. 70, the horizontal axis represents elapsed time, and the vertical axis represents simultaneously multiplexed directory data and system information tables.

In the figure, 9701 denotes a portion where stream-based content data is multiplexed by the data multiplexing unit 5103 . Reference numeral 9702 indicates a portion where the data multiplexing unit 103 multiplexes the page base directory data. 9703 denotes a portion where the system information table generated by the system information table generating unit 105 is multiplexed.

3-2. Receiving device 9121

Fig. 98 is a block diagram showing the structure of the data receiving apparatus of this embodiment.

This receiving device 9121 is compared with the data receiving device 121 shown in FIG. 52 of the second embodiment, and the components denoted by the same reference numerals are the same contents. The description of the same parts will be omitted below, and the differences will be mainly explained.

The difference is that a TS decoder unit 9123 and a reception control unit 9126 are provided instead of the TS decoder unit 123 and reception control unit 126 of FIG. 52 . Also, the filter condition storage unit 9131 in the TS decoder unit 9123 is also different.

3-2-1. TS decoder unit 9123

The TS decoder unit 9123 has both the functions of the decoder units 5123 and 123 of the first and second embodiments. This is because it corresponds to both the stream base directory and the page base directory. Therefore, the filter condition storage unit 9131 can also set all settable filter conditions for each of the filter condition storage units 5131 and 131 in the first and second embodiments.

FIG. 99 shows a filter condition table showing the contents stored in the filter condition storage unit 9131. The filter condition storage unit 9131 stores a plurality of filter conditions. The filter condition is as shown in the above figure, consisting of "filter identification number", "start/stop", "PID", "Stream_id", "table_id_extension", "Version_no", and "output terminal". Relevant items have already been described in the first and second embodiments, so the description is omitted.

3-2-2. Receive control unit 9126

The reception control unit 9126 has both the functions of the reception control units 5126 and 126 of the first and second embodiments. This is also because it corresponds to both the stream base directory and the page base directory.

100 and 101 show the flow of the control list of the reception control unit 9126. In FIG. 100 , S2402 , S2404 , S2406 , and S2405 are the same as steps with the same symbols in FIG. 76 . In FIG. 101 , S2410 , S2412 , S2414 , S2416 , and S2418 are the same steps as those in FIG. 76 , and the processing is the same. In addition, in FIG. 101, the steps of S8110, S8112, and S8114 having the same symbols as those in FIG. 36 have the same processing. However, in S2406 and S2408, "Cur_VE_comp_tag", "Cur_AE_comp_tag", "new_VE_comp_tag", and "new_AE_comp_tag" are also processed.

In FIG. 100 , the reception control unit 9126 determines whether the various identifiers specified in S2405 refer to the stream-based directory or the page-based directory. Specifically, if "new_VE_Comp_tag" is included, it is determined to be a stream-based directory, and if "new_VE_id" is included, it is determined to be a page-based directory.

Furthermore, the reception control unit 9126 performs the processing after S8110 in FIG. 101 when it determines that it is a stream-based directory, and performs the processing after S2110 in FIG. 101 when it determines that it is a page-based directory. Details of these processes are the same as those described in the first and second embodiments.

3-2-3. Others

In addition, in the third embodiment, the base directory and the page base directory are distinguished by specifying "VE_Comp_tag" or "VE_id", but not limited to this, for example, an identifier indicating the difference may be set in other ways.

Furthermore, although the structure information storage unit 109 separately stores the structure tables for the stream-based directory and the page-based directory, they may be mixed in one structure information table. In this case, if a flag indicating a stream-based directory or a page-based directory is set, the multiplexing units 5103, 103 also multiplex the directories assigned by the flags.

Furthermore, in the first and second embodiments, although the moving picture data included in each stream-based directory is started to be multiplexed at the same time, it is also possible to multiplex in such a way that the playback time of the moving picture partially overlaps. .

In addition, in the above-mentioned first and third embodiments, it is assumed that the moving image data of the stream-based content is the actual size of the display screen of the receiving device 5121, but moving image data of a size smaller than that can also be created. For example, if the number of moving pictures is 1/4, the bit rate can also be 1/4, so even if the upper limit of the bit rate that can be assigned to a talk program is determined, the number of directories can be increased. Also in this case, it is possible to obtain a reproduced image combined with an object display based on the navigation information. In addition, one directory can also have 2 to 4 moving image data of 1/4 size at the same time.

In the first and third embodiments, even if it is a still image related to the page base content, it may be image data smaller than the display screen. One directory may have a plurality of image data. For example, one directory may also have 2 to 4 still images of 1/4 size.

With a still image as the background, 1/4 size moving image data can also be played back on it.

Also, in the first to third embodiments, the scripts in the processor definition table in the navigation information can also describe the operation of the receiving device in addition to the display switching of keys and images (characters and graphics). For example, it is also possible to specify the designation of the sound to be played when a key is selected, when it is confirmed, and when an operation error occurs (view (pi-pu) sound card sound) according to the user's operation. In addition, in the content of the interactive program which includes various commodity shopping information as the content, it is also possible to describe the script for the calculation of the total amount upon receiving the input of numbers (prices) from the operator.

In the first to third embodiments, as described using program blocks, the reception control unit can be realized by software. That is, the program describing its function is realized by being executed by the CPU. On the other hand, since components other than the reception control unit are realized by hardware, existing digital satellite broadcast tuners also generally have equivalent hardware. Therefore, the apparatus of the present invention can be implemented even if the program describing the function of the reception control unit is incorporated into an existing digital satellite broadcast tuner. For example, by using a recording medium such as a ROM card that records the above program, it is enough to load the program into an existing digital satellite broadcast tuner. According to this configuration, the existing digital satellite broadcast tuner can be used flexibly and slightly modified. this invention.

Although the present invention has been fully described by way of example with reference to the accompanying drawings, it is to be noted that various changes and modifications will be apparent to those skilled in the art. Therefore, unless otherwise such changes and modifications depart from the scope of the present invention, they should be construed as being included therein.

Claims (10)

1. broadcaster, this broadcaster broadcast form the dialogue program a plurality of catalogues by demultiplexing demultiplexing stream,

One catalogue comprises the control information of a plurality of expressions and another or a plurality of directory link;

Described control information with identifying information and version number by demultiplexing in described demultiplexing stream, described identifying information is represented in a plurality of control informations each control information other parameter among the homogeneous turbulence ID and the described control information of expression altogether, and described version number is the version number with the pairing effective time zone of this control information.

2. according to the broadcaster of claim 1, it is characterized in that: by the control information that is comprised in the represented chained representation of described control information another or a plurality of catalogue.

3. according to the broadcaster of claim 1 or 2, it is characterized in that: described stream ID is that each control information that is comprised in the catalogue is total to homogeneous turbulence ID, and described parameter is described each control information other parameter.

4. according to the broadcaster of claim 1 or 2, it is characterized in that: described stream ID is that each control information in a plurality of catalogues is total to homogeneous turbulence ID, and described parameter is described each control information other parameter.

5. according to the broadcaster of claim 1 or 2, it is characterized in that:

Described broadcaster possesses

The demultiplexing device, to described control information give described identifying information and generate demultiplexing stream and

Broadcast device will be stated from digital broadcasting wave by the demultiplexing stream that the demultiplexing device generates and broadcast.

6. according to the broadcaster of claim 5, it is characterized in that:

A described catalogue comprises live image;

Described demultiplexing device carries out demultiplexing with the live image that is comprised in the described catalogue, gives corresponding to the version number of the effective time zone of this live image to each control information that is comprised in the described catalogue simultaneously and carries out demultiplexing.

7. according to the broadcaster of claim 6, it is characterized in that:

Described demultiplexing device carries out demultiplexing with each control information that is comprised in the described catalogue repeatedly between the effective time zone of each control information corresponding to described live image.

8. according to the broadcaster of claim 1 or 2, it is characterized in that: the storage device that possesses the described catalogue of storage.

9. according to the broadcaster of claim 1 or 2, it is characterized in that:

Described stream ID is the Packet Identifier PID by the MPEG2 prescribed by standard, and described parameter is the table_id_extension by the MPEG2 prescribed by standard.

10. the broadcasting method of a broadcaster, this broadcaster broadcast form the dialogue program a plurality of catalogues by demultiplexing demultiplexing stream,

One catalogue comprises the control information of the link of a plurality of expressions another or a plurality of catalogues;

Described control information with identifying information and version number by demultiplexing in described demultiplexing stream, described identifying information is represented in a plurality of control informations each control information other parameter among the homogeneous turbulence ID and the described control information of expression altogether, and described version number is the version number with the pairing effective time zone of this control information.

Images