JP3992979B2 - Information recording medium, information recording apparatus and method, information reproducing apparatus and method, information recording / reproducing apparatus and method, computer program for recording or reproduction control, and data structure including control signal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an information recording medium such as a high-density optical disc capable of recording various information such as main video, audio, sub-video, and reproduction control information at high density, an information recording apparatus for recording information on the information recording medium, and Method, information reproducing apparatus and method for reproducing information from the information recording medium, information recording / reproducing apparatus and method capable of both recording and reproduction, computer program for recording or reproduction control, and reproduction control Belongs to the technical field of the data structure including the control signal.
[0002]
[Prior art]
A DVD is generalized as an optical disc on which various information such as main video, audio, sub-video, and reproduction control information is recorded. According to the DVD standard, main video information (video data), audio information (audio data), and sub-picture information (sub-picture data) are packetized together with reproduction control information (navigation data), respectively, to provide a high-efficiency encoding technique. Are recorded on the disc in a program stream format conforming to the MPEG2 (Moving Picture Experts Group phase 2) standard. Of these, the main video information includes only one stream of data compressed according to the MPEG video format (ISO13818-2) in one program stream. On the other hand, the audio information is recorded by a plurality of methods (that is, linear PCM, AC-3, MPEG audio, etc.) and can exist in one program stream up to a total of 8 streams. The sub-picture information is defined by a bitmap and compressed and recorded by a run length method, and can exist in one program stream up to 32 streams. Thus, in the case of DVD, by adopting the program stream format, for example, for one movie, multiple streams of selectable audio information (for example, in addition to stereo audio or surround audio, for one stream of main video information, A stream of original English audio, Japanese dubbed audio, etc.) and a plurality of selectable sub-picture information streams (for example, streams of Japanese subtitles, English subtitles, etc.) are multiplexed and recorded.
[0003]
On the other hand, the transport stream (Transport Stream) format of the MPEG2 standard has recently been standardized, which is suitable for data transmission with a larger capacity or higher speed. According to this transport stream format, a plurality of elementary streams are simultaneously transmitted at a much higher transfer rate than the aforementioned program stream format. For example, a plurality of programs or programs, such as a large number of satellite digital broadcast television channels, are multiplexed on a single satellite radio wave and transmitted simultaneously. In other words, in the transport stream format, it is possible to multiplex multiple elementary video elementary streams each with a large amount of data in time division and transmit them simultaneously, for example, to transmit multiple movies recorded on multiple DVDs simultaneously. It is.
[0004]
[Problems to be solved by the invention]
However, the above-described DVD can only multiplex-record one stream of main video together with multiple streams of audio information, sub-video information, etc., and cannot multiplex-record multiple streams of main video. That is, there is a problem that a DVD that performs recording in conformity with the MPEG2 program stream format cannot essentially multiplex record a plurality of programs or programs that are simultaneously transmitted in the above-described MPEG2 transport stream format.
[0005]
Even if there is a disk with a high transfer rate and a large recording capacity or a high density recording that can simultaneously record a plurality of programs transmitted in the transport stream format, a plurality of bundles must be bundled during reproduction. It is not easy to determine which elementary stream corresponds to which of a plurality of multiplexed content information pieces among the elementary streams. For example, as in the satellite broadcast tuner, this association needs to be performed according to the information reproduction apparatus by first reproducing the multiplexed control information piece (that is, the information piece describing this association). Yes, quick and easy reproduction is difficult. Furthermore, in reproduction based on such control information pieces, unlike a tuner that performs simple tuning, it is extremely difficult to accurately perform special reproduction processing such as search, scanning, and interactive reproduction specific to the information reproduction apparatus. There is a problem.
[0006]
In addition, the interpretation rule for the association between each elementary stream and each content information piece to be multiplexed may be freely determined according to local rules such as for each country. When a plurality of programs having different interpretation rules are recorded on the same disc, it is more difficult to determine which elementary stream corresponds to which content information piece during reproduction. More specifically, it is difficult to execute demultiplexing quickly and accurately so as to extract content information to be reproduced from read data in which content information pieces and control information pieces are multiplexed and recorded. There is a technical problem of becoming.
[0007]
The present invention has been made in view of the above-mentioned problems. For example, a large amount of content information such as a plurality of programs or programs can be recorded in a multiplex manner, and information that allows a desired one to be reproduced relatively easily. It is an object to provide a data structure including a recording medium, an information recording apparatus and method, an information reproducing apparatus and method, an information recording and reproducing apparatus and method, a computer program for recording or reproduction control, and a control signal for reproduction control. .
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the information recording medium of the present invention multiplex-records a whole stream including a plurality of partial streams each composed of a series of content information in units of packets, which are physically accessible units. An information recording medium, which is a logically accessible unit and stores object data consisting of a plurality of packets each storing a fragment of the content information, and an object data file stored in the object data file A playback sequence information file for storing playback sequence information defining the playback sequence of the object data, and a plurality of packets multiplexed at the same time as playback control information for controlling playback of the object data file The correspondence with the partial stream of An object information file for storing correspondence definition information, and the correspondence definition information is a table showing packet identification numbers uniquely assigned among a plurality of packets multiplexed at the same time for each partial stream. Contains information.
[0009]
According to the information recording medium of the present invention, for example, the entire stream such as at least part of the MPEG2 transport stream includes a plurality of partial streams such as elementary streams. The partial stream is composed of a series of content information that can be reproduced by the information reproducing apparatus, for example, main video information (video data), audio information (audio data), sub-video information (sub-picture data), and the like. That is, in the present application, one “partial stream” refers to one data arrangement or information arrangement such as a video stream, an audio stream, a sub-picture stream, etc., which are a series of content information, for example, an elementary stream. On the other hand, in the present application, one “whole stream” refers to a data arrangement or an information arrangement in which a plurality of partial streams are bundled. The entire stream may be a transport stream itself formed by bundling m (where m is a natural number of 2 or more) elementary streams in MPEG2, and of these, n (where n is 2 or more and less than m). (Natural number) may be a data array or an information array formed by bundling elementary streams. Such an entire stream is multiplexed and recorded on the information recording medium in units of packets (for example, TS packets described later) which are units physically accessible by the information reproducing apparatus. Here, in particular, the object data file is a unit that can be logically accessed by the information reproducing apparatus, and stores object data including a plurality of packets each storing pieces of content information. The reproduction sequence information stores reproduction sequence information (for example, playlist information) that defines the reproduction sequence of the object data stored in the object data file. The object information file stores the correspondence definition information as reproduction control information for controlling reproduction of the object data file by the information reproducing apparatus. Various information stored in the object information file and the reproduction sequence information file is not multiplexed in units of packets on the information recording medium, unlike the case of the object data file. Therefore, the object data can be reproduced in the information reproducing apparatus based on the reproduction control information and the reproduction sequence information.
[0010]
In this case, in particular, in the information reproducing apparatus, the information recording medium is based on the correspondence between the plurality of packets multiplexed at the same time and the plurality of partial streams described in the correspondence definition information included in the reproduction control information. It is possible to reproduce a desired program or program composed of a combination of content information consisting of a part of the entire stream multiplexed and recorded alone. In addition, the correspondence definition information stored in the object information file that is not multiplexed on a packet basis in this way is table information that indicates, for each partial stream, a packet identification number that is uniquely assigned among a plurality of packets that are multiplexed at the same time. (For example, an ES map table (ES_Map Table) indicating an elementary stream packet ID (ES_PID) described later) is included. Therefore, when the table information included in the correspondence definition information is first acquired at the time of reproduction, it is relatively easy to determine which partial stream among a plurality of partial streams corresponds to which packet. Thus, the object data can be efficiently reproduced. Furthermore, based on the table information included in the correspondence definition information, special reproduction processing such as search, scanning, interactive reproduction, etc. can be performed accurately on the object data.
[0011]
Note that, for example, table information (for example, an ES map table described later) included in such correspondence definition information is included in a packet-multiplexed form in a transport stream related to digital broadcasting as an object data source. One correspondence definition information (for example, PAT, PMT described later) can be first read at the time of recording, and can be constructed based on the interpretation result.
[0012]
As a result, according to the information recording medium of the present invention, a large amount of content information such as a plurality of programs or programs can be recorded in a multiplexed manner, and a desired one of them can be reproduced relatively easily.
[0013]
In one aspect of the information recording medium of the present invention, the table information indicates an address on the information recording medium corresponding to the packet identification number in addition to the packet identification number.
[0014]
According to this aspect, at the time of reproduction, which partial stream among a plurality of partial streams corresponds to which packet at each address on the information recording medium based on the packet identification number and address indicated by the table information. Can be determined relatively easily, and the object data can be efficiently reproduced.
[0015]
In another aspect of the information recording medium of the present invention, the object data file includes a plurality of object data recorded based on different interpretation rules with respect to the correspondence relationship, and the correspondence definition information includes the plurality of correspondence data. The correspondence relationship is defined based on a uniform interpretation rule between the object data.
[0016]
According to this aspect, even when a plurality of object data multiplexed and recorded based on different interpretation rules according to local rules such as for each country exist on the same information recording medium, Any object data can be reproduced without any problem on the basis of the correspondence definition information recorded without being multiplexed in packet units. In particular, at the time of recording, for example, it is not necessary to change and record the data structure in the transport stream in which a plurality of TV channel programs are simultaneously digitally broadcast, and in addition to this, an object information file, a reproduction sequence information file, etc. This is very convenient in practice.
[0017]
In another aspect of the information recording medium of the present invention, the entire stream includes two or more partial streams composed of main video information as the series of content information.
[0018]
According to this aspect, since an entire stream such as an MPEG2 transport stream including two or more partial streams (that is, video streams) composed of main video information can be recorded collectively by multiplex recording, it is convenient. is there.
[0019]
In order to solve the above-described problem, the information recording apparatus of the present invention provides an entire stream including a plurality of partial streams each composed of a series of content information on an information recording medium in a physically accessible unit. An information recording apparatus for performing multiplex recording in a packet unit, which is a logically accessible unit and records an object data file storing object data consisting of a plurality of packets each storing a fragment of the content information A first recording means, a second recording means for recording a reproduction sequence information file for storing reproduction sequence information defining a reproduction sequence of the object data stored in the object data file, and for controlling reproduction of the object data file; Is multiplexed at the same time as playback control information. And third recording means for recording an object information file for storing correspondence definition information for defining correspondence relations between a plurality of packets and the plurality of partial streams, wherein the third recording means includes the correspondence definition information The object information file is recorded so as to include table information indicating packet identification numbers uniquely assigned among a plurality of packets multiplexed at the same time for each partial stream.
[0020]
According to the information recording apparatus of the present invention, an object data file storing object data is recorded by a first recording means such as a system controller, an encoder, a TS object generator described later, and an optical pickup, for example. Object information for recording a reproduction sequence information file for storing reproduction sequence information by a second recording means such as a pickup, and storing correspondence definition information as reproduction control information by a third recording means for example a system controller or an optical pickup Record the file.
[0021]
At this time, the first recording unit multiplex-records the object data in units of packets, whereas the third recording unit uniquely assigns a packet identification number (for example, described later) between a plurality of packets multiplexed at the same time. ES_PID) for each partial stream is recorded without multiplexing an object information file storing correspondence definition information including table information (for example, an ES map table described later). Therefore, it is possible to relatively easily record the entire stream such as at least a part of the transport stream of MPEG2, for example, on the above-described information recording medium of the present invention.
[0022]
Also, for example, such table information is stored in a piece of correspondence definition information (for example, PAT described later) included by the third recording means in a form of being multiplexed in a transport stream relating to digital broadcasting as an object data source. , PMT, etc.).
[0023]
Incidentally, in response to the various aspects of the information recording medium of the present invention described above, the information recording apparatus of the present invention can also adopt various aspects.
[0024]
In one aspect of the information recording apparatus of the present invention, the table information indicates an address on the information recording medium corresponding to the packet identification number in addition to the packet identification number.
[0025]
According to this aspect, at the time of reproduction of the information recording medium, a plurality of partial streams at each address on the information recording medium based on the packet identification number and address indicated by the table information recorded by the information recording apparatus. Which partial stream corresponds to which packet can be determined relatively easily, and the object data can be efficiently reproduced.
[0026]
In another aspect of the information recording apparatus of the present invention, the entire stream is composed of at least a part of an MPEG2 transport stream that is digitally broadcast and received by a set top box, and the first recording means receives the received signal. The object data file is recorded so that one piece of correspondence definition information defining the correspondence relation included in the entire stream is included in a part of the object data in a form multiplexed with the content information.
[0027]
According to this aspect, an entire stream such as at least a part of a transport stream that is digitally broadcast (that is, a part corresponding to a television program of all channels or a plurality of channels) is converted into one correspondence definition information (for example, described later). PAT, PMT, etc.) can be multiplexed and recorded on the information recording medium in real time in a multiplexed form, which is very convenient.
[0028]
In addition, if one piece of correspondence definition information is stored in a multiplexed form in the object data file, reproduction processing based on the correspondence definition information in the object information file as described above (ie, multiple recording) Apart from the one playback definition that is not based on the corresponding definition information), for example, an object data file recorded on the information recording medium may be used as a data source to perform digital broadcast processing. In this case, a tuning process or the like in the tuner can be performed based on the multiplexed one correspondence definition information.
[0029]
In order to solve the above-mentioned problem, the information recording method of the present invention is configured so that an entire stream including a plurality of partial streams each composed of a series of content information is physically accessed in an information recording medium. An information recording method for multiplex recording in a certain packet unit, which is a logically accessible unit and records an object data file that stores object data consisting of a plurality of packets each storing a fragment of the content information A first recording step, a second recording step for recording a reproduction sequence information file for storing reproduction sequence information defining a reproduction sequence of the object data stored in the object data file, and for controlling reproduction of the object data file Is multiplexed at the same time as playback control information. A third recording step for recording an object information file for storing correspondence definition information defining a correspondence relationship between a plurality of packets and the plurality of partial streams, wherein the correspondence definition information includes: The object information file is recorded so as to include table information indicating packet identification numbers uniquely assigned among a plurality of packets multiplexed at the same time for each partial stream.
[0030]
According to the information recording method of the present invention, as in the case of the information recording apparatus of the present invention described above, the object data file storing the object data is recorded by the first recording step, and the reproduction sequence is recorded by the second recording step. A reproduction sequence information file storing information is recorded, and an object information file storing correspondence definition information is recorded as reproduction control information in the third recording step.
[0031]
At this time, the first recording step multiplex-records the object data in units of packets, whereas the third recording step suffices to uniquely identify packet identification numbers (for example, described later) between a plurality of packets multiplexed at the same time. ES_PID) for each partial stream is recorded without multiplexing an object information file storing correspondence definition information including table information (for example, an ES map table described later). Therefore, it is possible to relatively easily record the entire stream such as at least a part of the transport stream of MPEG2, for example, on the above-described information recording medium of the present invention.
[0032]
Incidentally, in response to the various aspects of the information recording medium of the present invention described above, the information recording method of the present invention can also adopt various aspects.
[0033]
In one aspect of the information recording method of the present invention, the table information indicates an address on the information recording medium corresponding to the packet identification number in addition to the packet identification number.
[0034]
According to this aspect, at the time of reproduction of the information recording medium, a plurality of partial streams at each address on the information recording medium based on the packet identification number and address indicated by the table information recorded by the information recording method. Which partial stream corresponds to which packet can be determined relatively easily, and the object data can be efficiently reproduced.
[0035]
In another aspect of the information recording method of the present invention, the entire stream is composed of at least a part of an MPEG2 transport stream which is digitally broadcast and received by a set top box, and the first recording step includes the reception The object data file is recorded so that one piece of correspondence definition information defining the correspondence relation included in the entire stream is included in a part of the object data in a form multiplexed with the content information.
[0036]
According to this aspect, as in the case of the information recording apparatus of the present invention described above, at least a part of a transport stream that is digitally broadcast (that is, a part corresponding to a television program of all channels or a plurality of channels). This is very convenient because the entire stream can be multiplexed and recorded on the information recording medium in real time in a form in which one piece of correspondence definition information (for example, PAT, PMT described later) is multiplexed.
[0037]
In order to solve the above problems, an information reproducing apparatus of the present invention is an information reproducing apparatus for reproducing at least a part of the entire recorded stream from the above-described information recording medium of the present invention (including various aspects thereof). Reading means for physically reading information from the information recording medium, and information read by the reading means based on the reproduction control information and the reproduction sequence information included in the information read by the reading means. And reproducing means for reproducing the object data by executing demultiplexing.
[0038]
According to the information reproducing apparatus of the present invention, information is physically read from the information recording medium in units of packets or the like by reading means such as an optical pickup or a demodulator. Then, demultiplexing is performed on the information read in units of packets based on the playback control information and playback sequence information included in the read information by playback means such as a system controller, a demultiplexer, and a decoder. Thus, the object data is reproduced. Therefore, the information multiplexed and recorded on the information recording medium of the present invention described above can be appropriately reproduced as a series of content information.
[0039]
Incidentally, in response to the various aspects of the information recording medium of the present invention described above, the information reproducing apparatus of the present invention can also adopt various aspects.
[0040]
In one aspect of the information reproducing apparatus of the present invention, the reproducing means reproduces the plurality of multiplexed packets by the packet identification number indicated by the table information included in the information read by the reading means. A target corresponding to one or a plurality of target partial streams is specified.
[0041]
According to this aspect, object data is reproduced by specifying one corresponding to one or more partial streams to be reproduced among a plurality of multiplexed packets by the packet identification number indicated by the table information. Is possible.
[0042]
In order to solve the above problems, an information reproduction method of the present invention is an information reproduction method of reproducing at least a part of the entire recorded stream from the above-described information recording medium of the present invention (including various aspects thereof). A step of physically reading information from the information recording medium, and information read by the reading step based on the reproduction control information and the reproduction sequence information included in the information read by the reading step. A reproducing step of reproducing the object data by executing demultiplexing.
[0043]
According to the information reproducing method of the present invention, as in the case of the information reproducing apparatus of the present invention described above, information is physically read from the information recording medium in units of packets or the like by the reading process. Then, the object data is reproduced by performing demultiplexing on the information read in units of packets based on the reproduction control information and the reproduction sequence information included in the read information in the reproduction process. Therefore, the information multiplexed and recorded on the information recording medium of the present invention described above can be appropriately reproduced as a series of content information.
[0044]
Incidentally, in response to the various aspects of the information recording medium of the present invention described above, the information reproducing method of the present invention can also adopt various aspects.
[0045]
In one aspect of the information reproduction method of the present invention, the reproduction step reproduces the plurality of multiplexed packets by the packet identification number indicated by the table information included in the information read by the reading step. A target corresponding to one or a plurality of target partial streams is specified.
[0046]
According to this aspect, object data is reproduced by specifying one corresponding to one or more partial streams to be reproduced among a plurality of multiplexed packets by the packet identification number indicated by the table information. Is possible.
[0047]
In order to solve the above problems, an information recording / reproducing apparatus of the present invention records the entire stream on the above-described information recording medium (including various aspects thereof) of the present invention, and at least a part of the recorded entire stream. A first recording means for recording the object data file, a second recording means for recording the reproduction sequence information file, and a third recording means for recording the object information file. Reading means for physically reading information from the information recording medium, and information read by the reading means based on the reproduction control information and the reproduction sequence information included in the information read by the reading means. And reproducing means for reproducing the object data by executing demultiplexing
[0048]
According to the information recording / reproducing apparatus of the present invention, similarly to the information recording apparatus of the present invention described above, the object data file is multiplexed and recorded in units of packets by the first recording means, and the reproduction sequence information file is recorded by the second recording means. And the object information file is recorded by the third recording means. Thereafter, similarly to the information reproducing apparatus of the present invention described above, information is physically read from the information recording medium by the reading means, and based on the reproduction control information and the reproduction sequence information included in the read information by the reproducing means. In particular, the object data read in packet units is reproduced. Therefore, it is possible to relatively easily record the entire stream such as at least a part of the MPEG2 transport stream on the above-described information recording medium of the present invention, and further multiplex-record on the information recording medium. Information can be appropriately reproduced as a series of content information.
[0049]
Incidentally, in response to various aspects of the information recording medium of the present invention described above, the information recording / reproducing apparatus of the present invention can also adopt various aspects.
[0050]
In order to solve the above problems, an information recording / reproducing method of the present invention records the entire stream on the above-described second information recording medium of the present invention (including various aspects thereof) and at least at least the recorded entire stream. An information recording / reproducing method for reproducing a part, wherein a first recording step for recording the object data file, a second recording step for recording the reproduction sequence information file, and a third recording for recording the object information file Information read out by the reading step based on the reproduction control information and the reproduction sequence information included in the information read out by the step, the reading step of physically reading information from the information recording medium, and the information read out by the reading step A reproduction step of reproducing the object data by performing demultiplexing on That.
[0051]
According to the information recording / reproducing method of the present invention, similarly to the information recording method of the present invention described above, the object data file is multiplexed and recorded in units of packets in the first recording step, and the reproduction sequence information file is recorded in the second recording step. And the object information file is recorded in the third recording step. Thereafter, similarly to the information reproducing method of the present invention described above, information is physically read from the information recording medium by the reading process, and based on the reproduction control information and the reproduction sequence information included in the read information by the reproducing process. In particular, the object data read in packet units is reproduced. Therefore, it is possible to relatively easily record the entire stream such as at least a part of the MPEG2 transport stream on the above-described information recording medium of the present invention, and further multiplex-record on the information recording medium. Information can be appropriately reproduced as a series of content information.
[0052]
Incidentally, in response to the various aspects of the information recording medium of the present invention described above, the information recording / reproducing method of the present invention can also adopt various aspects.
[0053]
In order to solve the above problems, a computer program for recording control according to the present invention is a computer program for recording control that controls a computer provided in the above-described information recording apparatus (including various aspects thereof) of the present invention. The computer is caused to function as at least a part of the first recording unit, the second recording unit, and the third recording unit.
[0054]
According to the computer program for recording control of the present invention, the computer program is read from a recording medium such as a ROM, CD-ROM, DVD-ROM, and hard disk storing the computer program, and executed. If the computer program is downloaded to a computer via communication means and then executed, the above-described information recording apparatus according to the present invention can be realized relatively easily.
[0055]
In order to solve the above problems, a computer program for reproduction control according to the present invention is a computer program for reproduction control that controls a computer provided in the above-described information reproduction apparatus according to the present invention (including various aspects thereof). The computer is caused to function as at least a part of the reproducing means.
[0056]
According to the computer program for reproduction control of the present invention, the computer program is read from a recording medium such as a ROM, CD-ROM, DVD-ROM, hard disk or the like for storing the computer program and executed. If the computer program is downloaded to a computer via communication means and then executed, the above-described information reproducing apparatus according to the present invention can be realized relatively easily.
[0057]
In order to solve the above problems, a computer program for recording / reproducing control according to the present invention is used for recording / reproducing control for controlling a computer provided in the above-described information recording / reproducing apparatus of the present invention (including various aspects thereof). A computer program that causes the computer to function as at least part of the first recording means, the second recording means, the third recording means, and the reproducing means.
[0058]
According to the computer program for recording / reproduction control of the present invention, if the computer program is read from a recording medium such as a ROM, CD-ROM, DVD-ROM, and hard disk for storing the computer program and executed, Alternatively, the information recording / reproducing apparatus according to the present invention described above can be realized relatively easily if the computer program is executed after being downloaded to a computer via communication means.
[0059]
In order to solve the above problems, the data structure including the control signal of the present invention is a packet unit in which the entire stream including a plurality of partial streams each composed of a series of content information is a physically accessible unit. And an object data file for storing object data consisting of a plurality of packets each storing a fragment of the content information and a unit that is logically accessible and stored in the object data file. A reproduction sequence information file that stores reproduction sequence information that defines a reproduction sequence of object data, and a plurality of packets that are multiplexed at the same time as reproduction control information for controlling reproduction of the object data file Define correspondence with partial stream An object information file for storing response definition information, and the correspondence definition information is a table showing packet identification numbers uniquely assigned among a plurality of packets multiplexed at the same time for each partial stream. Contains information.
[0060]
According to the data structure including the control signal of the present invention, as in the case of the information recording medium of the present invention described above, a large amount of content information such as, for example, a plurality of programs or programs can be multiplexed and recorded. Of these, a desired one can be reproduced.
[0061]
Such an operation and other advantages of the present invention will become apparent from the embodiments described below.
[0062]
DETAILED DESCRIPTION OF THE INVENTION
(Information recording medium)
An embodiment of the information recording medium of the present invention will be described with reference to FIGS. In this embodiment, the information recording medium of the present invention is applied to an optical disc of a type capable of recording (writing) and reproducing (reading).
[0063]
First, the basic structure of the optical disc of this embodiment will be described with reference to FIG. FIG. 1 shows a schematic plan view of the structure of an optical disc having a plurality of areas on the upper side, and shows a conceptual diagram of the area structure in the radial direction on the lower side.
[0064]
As shown in FIG. 1, the optical disc 100 can be recorded by various recording methods such as a magneto-optical method and a phase change method, which can be recorded (written) a plurality of times or only once. A lead-in area 104, a data area 106, and a lead-out area 108 are provided on the recording surface of the disk main body having a diameter of about 12 cm from the inner periphery to the outer periphery with the center hole 102 as the center. In each area, for example, a groove track and a land track are alternately provided spirally or concentrically around the center hole 102, and the groove track may be wobbling, one of these Alternatively, prepits may be formed on both tracks. The present invention is not particularly limited to an optical disc having such three areas.
[0065]
Next, the configuration of the transport stream (TS) recorded on the optical disc of the present embodiment will be described with reference to FIG. FIG. 2A schematically shows the structure of a conventional MPEG2 program stream for comparison, and FIG. 2B schematically shows the structure of an MPEG2 transport stream (TS). It is shown as an example.
[0066]
In FIG. 2A, one program stream includes only one video stream for video data as main video information along the time axis t, and further includes an audio stream for audio data as audio information at the maximum. It includes 8 sub-picture streams for sub-picture data that is sub-picture information, and a maximum of 32 sub-picture streams. That is, the video data multiplexed at an arbitrary time tx relates to only one video stream. For example, a plurality of video streams corresponding to a plurality of television programs or movies are simultaneously converted into a program stream. Cannot be included. In order to multiplex and transmit or record a television program or the like with video, at least one video stream is required for each television program or the like, so a program stream format in which only one video stream exists Thus, it is impossible to multiplex and transmit or record a plurality of television programs.
[0067]
In FIG. 2 (b), one transport stream (TS) includes a plurality of video streams as elementary streams (ES) for video data as main video information, and further an audio data element as audio information. A plurality of audio streams are included as a elementary stream (ES), and a plurality of sub-picture streams are included as an elementary stream (ES) for sub-picture data serving as sub-picture information. That is, the video data multiplexed at an arbitrary time tx relates to a plurality of video streams. For example, a plurality of video streams corresponding to a plurality of television programs or a plurality of movies are included in the transport stream at the same time. Is possible. In such a transport stream format having a high transfer rate and a plurality of video streams, a plurality of television programs and the like can be multiplexed and transmitted or recorded. However, in the digital broadcasting employing the current transport stream, the sub-picture stream is not transmitted.
[0068]
2A and 2B, the video stream, the audio stream, and the sub-picture stream are arranged in this order from the top for convenience of explanation, but this order is multiplexed in packet units as will be described later. It does not correspond to the order in which they are converted. In the transport stream, conceptually, for example, a group of one video stream, two audio streams, and two sub-picture streams corresponds to one program.
[0069]
The optical disc 100 according to the present embodiment described above can multiplex-record a transport stream (TS) including a plurality of elementary streams (ES) as described above within the limitation of the recording rate, that is, a plurality of programs or The program can be recorded simultaneously.
[0070]
Next, the structure of data recorded on the optical disc 100 will be described with reference to FIGS. FIG. 3 schematically shows the data structure recorded on the optical disc 100, and FIG. 4 schematically shows the details of the data structure in each object shown in FIG. .
[0071]
In the following description, a “title” is a playback unit for continuously executing a plurality of “playlists”, and is a unit having a logically large unit such as one movie or one television program. is there. A “playlist” is a file that stores information necessary for playback of an “object”, and is composed of a plurality of “items” each storing information related to the playback range of the object for accessing the object. . More specifically, in each item, “IN point information” indicating the start address of the object and “OUT point information” indicating the end address are described. Each of these “IN point information” and “OUT point information” may directly indicate an address, or may indirectly indicate an address such as time or time on the reproduction time axis. The “object” is entity information of the content constituting the above-described MPEG2 transport stream.
[0072]
In FIG. 3, the optical disc 100 has four types of files, a disc information file 110, a play (P) list information file 120, an object information file 130, and an object data file 140, as logical structures. A file system 105 for management is further provided. 3 does not directly show the physical data arrangement on the optical disc 100, but the arrangement order shown in FIG. 3 is recorded so as to correspond to the arrangement order shown in FIG. It is also possible to record the file system 105 and the like in the data recording area 106 subsequent to the lead-in area 104 and further record the object data file 140 and the like in the data recording area 106. Even if the lead-in area 104 and the lead-out area 108 shown in FIG. 1 do not exist, the file structure shown in FIG. 3 can be constructed.
[0073]
The disc information file 110 is a file that stores comprehensive information about the entire optical disc 100, and stores disc comprehensive information 112, a title information table 114, and other information 118. The disc general information 112 stores the total number of titles in the optical disc 100, for example. The title information table 114 includes, as logical information, the type of each title (for example, a sequential playback type and a branch type, which will be described later with reference to FIG. 8), and a play (P) list number constituting each title for each title. Store.
[0074]
The play list information file 120 stores a play (P) list information table 121 indicating the logical structure of each play list, which includes a play (P) list general information 122, a play (P) list pointer 124, A plurality of play (P) lists 126 (P lists # 1 to #n) and other information 128 are divided. The playlist information table 121 stores logical information of each playlist 126 in the order of playlist numbers. In other words, the storage order of each playlist 126 is the playlist number. Further, it is possible to refer to the same playlist 126 from a plurality of titles in the title information table 114 described above. That is, even when the title #n and the title #m use the same playlist #p, the playlist information #p in the playlist information table 121 may be pointed by the title information table 114. .
[0075]
The object information file 130 stores a storage position (that is, a logical address to be played back) in the object data file 140 for each item configured in each playlist 126 and various attribute information related to the playback of the item. Particularly in the present embodiment, the object information file 130 includes an AU table 131 including a plurality of AU (associate unit) information 132I (AU # 1 to AU # n), which will be described in detail later, and an ES (elementary stream) map. A table 134 and other information 138 are stored.
[0076]
The object data file 140 stores a plurality of TS objects 142 (TS # 1 to TS # n objects) for each transport stream (TS), that is, actual data of content to be actually reproduced.
[0077]
Note that the four types of files described with reference to FIG. 3 can be further divided into a plurality of files and stored, and all of these may be managed by the file system 105. For example, the object data file 140 can be divided into a plurality of object data files # 1, object data files # 2,.
[0078]
As shown in FIG. 4, the TS object 142 shown in FIG. 3, which is a logically reproducible unit, is divided into a plurality of aligned units 143 each having a data amount of 6 kB, for example. The head of the aligned unit 143 is aligned with the head of the TS object 142 (aligned). Each aligned unit 143 is further subdivided into a plurality of source packets 144 each having a data amount of 192B. The source packet 144 is a physically reproducible unit. In this unit, that is, a packet unit, at least video data, audio data, and sub-picture data among the data on the optical disc 100 are multiplexed. May also be multiplexed. Each source packet 144 has a data amount of 4B and reproduces a packet arrival time stamp or the like indicating a reproduction processing start time (that is, a demultiplexing start time) of a TS (transport stream) packet on the reproduction time axis. Control information 145 for controlling the data, and a TS packet 146 having a data amount of 188B. The TS packet 146 has a packet header 146a at its head, and the video data is packetized into a “video packet”, the audio data is packetized into an “audio packet”, or a sub packet. Picture data is packetized to form a “sub-picture packet”, or other data is packetized.
[0079]
Next, referring to FIGS. 5 and 6, video data, audio data, sub-picture data, etc. in the transport stream format as shown in FIG. 2B are transferred to the optical disc 100 by the TS packet 146 shown in FIG. The point that multiple recording is performed will be described. FIG. 5 shows that the elementary stream (ES) for the upper program # 1 (PG1) and the elementary stream (ES) for the middle program # 2 (PG2) are multiplexed. FIG. 6 conceptually shows a state in which a transport stream (TS) for a program (PG1 & 2) is configured, with the horizontal axis as a time axis. FIG. 6 shows a multiplexed stream in one transport stream (TS). 3 conceptually shows an image of a TS packet as a packet arrangement along the time.
[0080]
As shown in FIG. 5, the elementary stream for program # 1 (upper stage) includes, for example, TS packets 146 in which video data for program # 1 is packetized discretely with respect to the time axis (horizontal axis). Arranged. The elementary stream (middle stage) for program # 2 is formed by discretely arranging TS packets 146 in which video data for program # 2 is packetized with respect to the time axis (horizontal axis). These TS packets 146 are multiplexed to construct a transport stream (lower stage) for these two programs. Although omitted in FIG. 5 for convenience of explanation, as shown in FIG. 2 (b), actually, it consists of TS packets in which audio data is packetized as an elementary stream for program # 1. A sub-picture stream consisting of TS packets in which elementary streams and sub-picture data are packetized may be similarly multiplexed. In addition, audio data is packetized as an elementary stream for program # 2. An elementary stream made up of the TS packets and a sub-picture stream made up of TS packets in which sub-picture data is packetized may be multiplexed in the same way.
[0081]
As shown in FIG. 6, in this embodiment, one TS stream is constructed from a large number of TS packets 146 multiplexed in this way. A large number of TS packets 146 are multiplexed and recorded on the optical disc 100 by adding information such as packet arrival time stamps 145 in such a multiplexed form. In FIG. 6, j (j = 1, 2,...) Is assigned to the TS packet 146 made up of data constituting program #i (i = 1, 2, 3) according to the stream constituting the program. Is indicated by “Element (i0j)”, and (i0j) is a packet ID which is an identification number of the TS packet 146 for each elementary stream. This packet ID is given a unique value among the plurality of TS packets 146 multiplexed at the same time so that they can be distinguished from each other even if the plurality of TS packets 146 are multiplexed at the same time.
[0082]
In FIG. 6, a PAT (program association table) and a PMT (program map table) are also packetized and multiplexed in units of TS packets 146. Among these, the PAT stores a table indicating packet IDs of a plurality of PMTs. In particular, the MPEG2 standard defines that PAT is given (000) as a predetermined packet ID as shown in FIG. That is, the TS packet 146 in which the PAT is packetized is detected as the TS packet 146 whose packet ID is (000) among many packets multiplexed at the same time. The PMT stores a table indicating packet IDs for each elementary stream constituting each program for one or a plurality of programs. An arbitrary packet ID can be assigned to the PMT, and the packet ID is indicated by a PAT that can be detected with the packet ID (000) as described above. Therefore, among many packets multiplexed at the same time, the TS packet 146 in which the PMT is packetized (that is, the TS packet 146 to which the packet IDs (100), (200), and (300) are assigned in FIG. 6). ) Is detected by PAT.
[0083]
When the transport stream as shown in FIG. 6 is digitally transmitted, the tuner refers to the PAT and PMT configured in this manner, thereby converting the multiplexed packet into a desired elementary stream. The corresponding one can be extracted and demodulated.
[0084]
In the present embodiment, such a PAT or PMT packet is included as the TS packet 146 stored in the TS object 142 shown in FIG. That is, there is a great advantage that when the transport stream as shown in FIG. 6 is transmitted, it can be recorded on the optical disc 100 as it is.
[0085]
Further, in the present embodiment, the PAT and PMT recorded in this way are not referred to when the optical disc 100 is played back, but instead refer to the AU table 131 and the ES map table 134 described in detail later after FIG. As a result, more efficient reproduction is possible, and it is possible to cope with complicated multi-vision reproduction. Therefore, in the present embodiment, for example, the correspondence between the elementary stream and the packet obtained by referring to the PAT and PMT at the time of demodulation or recording is expressed in the form of the AU table 131 and the ES map table 134 and packetized. It is stored in the object information file 130 without being multiplexed.
[0086]
Next, the logical configuration of data on the optical disc 100 will be described with reference to FIGS. FIG. 7 schematically shows the logical configuration of the data on the optical disc 100, focusing on the development from the logical hierarchy to the object hierarchy or the entity hierarchy. FIG. 8 schematically shows two specific examples of the logical structure in the play (P) list constituting one title shown in FIG.
[0087]
In FIG. 7, on the optical disc 100, one or a plurality of titles 200 which are logically large groups such as one movie and one television program are recorded. Each title 200 is logically composed of one or a plurality of playlists 126. Within each title 200, a plurality of playlists may have a sequential structure or a branched structure, which will be described later with reference to FIG. In the case of a simple logical configuration, one title 200 includes one playlist 126. It is also possible to refer to one play list 126 from a plurality of titles 200.
[0088]
Each playlist 126 is logically composed of a plurality of items (play items) 204. Within each playlist 126, the plurality of ilems 204 may have a sequential structure or a branch structure. It is also possible to refer to one item 204 from a plurality of play lists 126. The playback range of the TS object 142 is logically specified by the above-described IN point information and OUT point information described in the item 204. Then, the reproduction range of the TS object 142 is physically designated by referring to the object information 130d with respect to the logically designated reproduction range. Here, the object information 130d includes various information for reproducing the TS object 142 such as attribute information of the TS object 142 and EP (entry path) map information 134d necessary for data search in the TS object 142 (note that The ES map table 134 shown in FIG. 3 includes a plurality of such EP map information 134d).
[0089]
When the TS object 142 is reproduced by the information recording / reproducing apparatus described later, the physical address to be reproduced in the TS object 142 is acquired from the item 204 and the object information 130d, and the desired elementary stream is reproduced. The
[0090]
As described above, in this embodiment, the IN point information and OUT point information described in the item 204 and the EP map information 134d described in the ES map table 134 (see FIG. 3) of the object information 130d are used to determine the logic in the playback sequence. The association from the hierarchy to the object hierarchy is executed, and the elementary stream can be reproduced.
[0091]
Particularly in the present embodiment, the types of titles 200 are roughly classified into “1 playlist title” and “multiple playlist titles”, and the latter is further composed of “sequential playlist”. It is categorized as “divided playlist”.
[0092]
Among these, the title 200 composed of “sequential playlist” means that, as shown in the upper part of FIG. 8, a plurality of playlists # 1, playlist # 2, and playlist # 3 are simply on the playback time axis. It will be played back sequentially. In this case, the playback order matches the playlist number, and accordingly, all playlist numbers are stored in the corresponding title #n information in the playback order.
[0093]
On the other hand, as shown in the lower part of FIG. 8, the title 200 composed of “branch-type playlist” is selectively reproduced by playlist # 2 or playlist # 3 following a plurality of playlists # 1. Further, the playlist # 4 or the playlist # 5 is selectively reproduced following the playlist # 2. In this case, the playlist 126 to be reproduced next is determined according to the branch condition at the end of reproduction of the in-title playlist. Therefore, the arrangement order of the playlist 126 in the title #n information does not match the reproduction order. Only the first playlist 126 is identified. The branch condition is stored in another area. Thereby, for example, one playlist 126 can be selected by an interactive operation by the viewer.
[0094]
In any of the types of titles shown in FIG. 8, it is composed of one or more playlists 126. In particular, according to the present embodiment, a plurality of elementary streams are converted into units of TS packets 146. Can be multiplexed and recorded.
[0095]
As described above in detail, in the present embodiment, multiple recording is performed in units of TS packets 146 on the optical disc 100, thereby including a large number of elementary streams as shown in FIG. The transport stream can be multiplexed and recorded on the optical disc 100. According to this embodiment, when a digital broadcast is recorded on the optical disc 100, a plurality of programs or a plurality of programs can be recorded simultaneously within the limit of the recording rate. A method of multiplexing and recording a plurality of programs is adopted. Hereinafter, an embodiment of an information recording / reproducing apparatus capable of executing such a recording process will be described.
[0096]
(Information recording / reproducing device)
Next, an embodiment of the information recording / reproducing apparatus of the present invention will be described with reference to FIGS. FIG. 9 is a block diagram of the information recording / reproducing apparatus, and FIGS. 10 to 14 are flowcharts showing the operation.
[0097]
In FIG. 9, the information recording / reproducing apparatus 500 is roughly divided into a reproduction system and a recording system, and is configured to be able to record information on the optical disc 100 described above and to reproduce information recorded on the information. . In this embodiment, the information recording / reproducing apparatus 500 is used for recording / reproducing as described above. However, the recording apparatus of the present invention can basically be configured from the recording system portion, and on the other hand, basically, The embodiment of the information reproducing apparatus of the present invention can be configured from the reproducing system portion.
[0098]
The information recording / reproducing apparatus 500 includes an optical pickup 502, a servo unit 503, a spindle motor 504, a demodulator 506, a demultiplexer 508, a video decoder 511, an audio decoder 512, a sub-picture decoder 513, an adder 514, a system controller 520, and a memory 530. , A modulator 606, a formatter 608, a TS object generator 610, a video encoder 611, an audio encoder 612, and a sub-picture encoder 613. The system controller 520 includes a file system / logical structure data generator 521 and a file system / logical structure data reader 522. Further, the system controller 520 is connected to a memory 530 and a user interface 720 for performing user input such as title information.
[0099]
Among these components, a demodulator 506, a demultiplexer 508, a video decoder 511, an audio decoder 512, a sub-picture decoder 513, and an adder 514 constitute a reproduction system. On the other hand, among these components, a modulator 606, a formatter 608, a TS object generator 610, a video encoder 611, an audio encoder 612, and a sub-picture encoder 613 generally constitute a recording system. The optical pickup 502, the servo unit 503, the spindle motor 504, the system controller 520 and the memory 530, and the user interface 720 for inputting user information such as title information are generally shared by both the reproduction system and the recording system. Further, for the recording system, a TS object data source 700, a video data source 711, an audio data source 712, and a sub-picture data source 713 are prepared. Further, the file system / logical structure data generator 521 provided in the system controller 520 is mainly used in the recording system, and the file system / logical structure reader 522 is mainly used in the reproduction system.
[0100]
The optical pickup 502 irradiates the optical disc 100 with a light beam LB such as a laser beam at a first power as reading light during reproduction, and irradiates the recording light as a writing light with a second power while being modulated. The servo unit 503 receives control by the control signal Sc1 output from the system controller 520 during reproduction and recording, and performs focus servo, tracking servo, and the like in the optical pickup 502 and spindle servo in the spindle motor 504. The spindle motor 504 is configured to rotate the optical disc 100 at a predetermined speed while receiving spindle servo from the servo unit 503.
[0101]
(I) Configuration and operation of recording system:
Next, with reference to FIG. 9 to FIG. 13, specific configurations and operations of the respective components constituting the recording system in the information recording / reproducing apparatus 500 will be described for each case.
[0102]
(I-1) When using a created TS object:
This case will be described with reference to FIGS.
[0103]
In FIG. 9, a TS object data source 700 includes a recording storage such as a video tape and a memory, and stores TS object data D1.
[0104]
In FIG. 10, first, information of each title logically configured on the optical disc 100 using the TS object data D1 (for example, program list configuration contents) is input from the user interface 720 as user information I2 such as title information. Is input to the system controller 520. Then, the system controller 520 takes in the user input I2 such as title information from the user interface 720 (step S21: Yes and step S22). At this time, in the user interface 720, under the control of the control signal Sc4 from the system controller 520, for example, selection through the title menu screen, input processing corresponding to the content to be recorded is possible. If the user input has already been executed (step S21: No), these processes are omitted.
[0105]
Next, the TS object data source 700 outputs TS object data D1 under the control of the control signal Sc8 instructing data reading from the system controller 520. Then, the system controller 520 takes in the TS object data D1 from the TS object source 700 (step S23), and packetizes it with the video data, for example, as described above by the TS analysis function in the file system / logical structure data generator 521. Based on the PAT, PMT, etc., the data array (for example, recording data length) in the TS object data D1, analysis of the configuration of each elementary stream (for example, ES_PID (elementary stream packet identification number) described later) Understand) (step S24).
[0106]
Subsequently, the system controller 520 uses the file system / logical structure data generator 521 to analyze the logical information from the user input I2 such as the captured title information, the data array of the TS object data D1, and the analysis result of each elementary stream. As the file data D4, a disc information file 110, a playlist information file 120, an object information file 130, and a file system 105 (see FIG. 3) are created (step S25). The memory 530 is used when creating such logical information file data D4.
[0107]
Various variations such as preparing data on the data array of the TS object data D1 and the configuration information of each elementary stream in advance are naturally conceivable, but these are also within the scope of the present embodiment.
[0108]
In FIG. 9, a formatter 608 is a device that performs a data array format for storing both the TS object data D1 and the logical information file data D4 on the optical disc 100. More specifically, the formatter 608 includes a switch Sw1 and a switch Sw2, and is controlled by a switch control signal Sc5 from the system controller 520. When formatting the TS object data D1, the switch Sw1 is set to the (1) side. And the switch Sw2 is connected to the (1) side, and TS object data D1 from the TS object data source 700 is output. Note that transmission control of the TS object data D1 is performed by a control signal Sc8 from the system controller 520. On the other hand, when formatting the logical information file data D4, the formatter 608 is controlled by the switch control signal Sc5 from the system controller 520, connects the switch Sw2 to the (2) side, and outputs the logical information file data D4. It is configured as follows.
[0109]
In step S26 of FIG. 10, by the switching control by the formatter 608 configured as described above, (i) logical information file data D4 from the file system / logical structure data generator 521 in step S25 or (ii) TS object data source TS object data D1 from 700 is output via the formatter 608 (step S26).
[0110]
The selected output from the formatter 608 is sent to the modulator 606 as disc image data D5, modulated by the modulator 606, and recorded on the optical disc 100 via the optical pickup 502 (step S27). The disk recording control at this time is also executed by the system controller 520.
[0111]
If both the logical information file data D4 generated in step S25 and the TS object data D2 corresponding to the logical information file data D4 have not been recorded, the process returns to step S26 to continue recording (step S28: No). . Note that the recording order of the logical information file data D4 and the TS object data D2 corresponding to the logical information file data D4 may be either first or later.
[0112]
On the other hand, if both of these have been recorded, it is determined whether or not recording on the optical disc 100 should be terminated based on the presence or absence of an end command or the like (step S29). Returning to S21, the recording process is continued. On the other hand, if it should be terminated (step S29: Yes), the series of recording processes is terminated.
[0113]
As described above, the information recording / reproducing apparatus 500 performs the recording process when the created TS object is used.
[0114]
In the example shown in FIG. 10, after the logical information file data D4 is created in step S25, data output of the logical information file data D4 and the corresponding TS object data D2 is executed in step S26. Before step S25, the TS object data D2 is output and recorded onto the optical disc 100, and the logical information file data D4 can be generated and recorded after this recording or in parallel with this recording. is there.
[0115]
(I-2) When receiving and recording a transport stream being broadcast:
This case will be described with reference to FIGS. In FIG. 11, the same steps as those in FIG. 10 are denoted by the same step numbers, and description thereof will be omitted as appropriate.
[0116]
In this case as well, substantially the same processing as in the above-described “in the case of using a created TS object” is performed. Therefore, the following description will be focused on the differences.
[0117]
When receiving and recording a transport stream being broadcast, the TS object data source 700 includes, for example, a receiver (set top box) that receives a digital broadcast being broadcast, and receives TS object data D1. Then, it is sent to the formatter 608 in real time (step S41). At the same time, reception information D3 including program configuration information decoded at the time of reception and ES_PID information described later (that is, information corresponding to data sent via the interface between the receiver and the system controller 520) is sent to the system controller 520. The data is captured and stored in the memory 530 (step S44).
[0118]
On the other hand, the TS object data D1 output to the formatter 608 is output to the modulator 606 by the switching control of the formatter 608 (step S42) and recorded in the optical disc 100 (step S43).
[0119]
In parallel with these, the file system / logical structure generator 521 creates the logical information file data D4 using the program configuration information and ES_PID information included in the reception information D3 captured at the time of reception and stored in the memory 530. (Step S24 and Step S25). After the series of TS object data D1 is recorded, the logical information file data D4 is additionally recorded on the optical disc 100 (steps S46 and S47). In addition, you may perform these processes of step S24 and S25 after completion | finish of step S43.
[0120]
Further, as necessary (for example, when editing a part of a title), user input I2 such as title information from the user interface 720 is added to the program configuration information and ES_PID information stored in the memory 530. The logical information file data D4 may be created by the system controller 520 and additionally recorded on the optical disc 100.
[0121]
As described above, the information recording / reproducing apparatus 500 performs the recording process when the transport stream being broadcast is received and recorded in real time.
[0122]
If all received data at the time of broadcasting is temporarily stored in the archive device and then used as the TS object source 700, the same processing as in the above-described case of using a created TS object is sufficient.
[0123]
(I-3) When recording video, audio and sub-picture data:
This case will be described with reference to FIGS. In FIG. 12, the same steps as those in FIG. 10 are denoted by the same step numbers, and description thereof will be omitted as appropriate.
[0124]
When recording video data, audio data, and sub-picture data separately prepared in advance, the video data source 711, the audio data source 712, and the sub-picture data source 713 are each composed of a recording storage such as a video tape and a memory. , Video data DV, audio data DA, and sub-picture data DS are stored.
[0125]
These data sources are controlled by a control signal Sc8 instructing data reading from the system controller 520, and receive video data DV, audio data DA, and sub-picture data DS, respectively, a video encoder 611, an audio encoder 612, and a sub-picture data DS. The image is sent to the picture encoder 613 (step S61). The video encoder 611, the audio encoder 612, and the sub-picture encoder 613 execute a predetermined type of encoding process (step S62).
[0126]
Under the control of the control signal Sc6 from the system controller 520, the TS object generator 610 converts the encoded data into TS object data forming a transport stream (step S63). At this time, data arrangement information (for example, recording data length) of each TS object data and configuration information (for example, ES_PID described later) of each elementary stream are sent from the TS object generator 610 to the system controller 520 as information I6. And stored in the memory 530 (step S66).
[0127]
On the other hand, the TS object data generated by the TS object generator 610 is sent to the {circle around (2)} side of the switch Sw <b> 1 of the formatter 608. That is, when formatting the TS object data from the TS object generator 610, the formatter 608 is controlled to be switched by the switch control signal Sc5 from the system controller 520 so that the switch Sw1 is set to (2) and the switch Sw2 is set to (1). By connecting to the side, the TS object data is output (step S64). Subsequently, this TS object data is recorded in the optical disc 100 via the modulator 606 (step S65).
[0128]
In parallel with these, the file system / logical structure generator 521 converts the logical information file data D4 by using the data arrangement information of each TS object data fetched into the memory 530 as information I6 and the configuration information of each elementary stream. Create (step S24 and step S25). After the series of TS object data D1 is recorded, it is additionally recorded on the optical disc 100 (steps S67 and S68). Note that the processing in steps S24 and S25 may also be performed after the end of step S65.
[0129]
Further, as necessary (for example, when editing a part of the title), the user input I2 such as title information from the user interface 720 is added to the information stored in the memory 530, thereby the file system. The logical information file data D4 may be created by the logical structure generator 521 and additionally recorded on the optical disc 100.
[0130]
As described above, the information recording / reproducing apparatus 500 performs the recording process when recording video data, audio data, and sub-picture data separately prepared in advance.
[0131]
This recording process can also be applied when recording arbitrary content owned by the user.
[0132]
(I-4) When recording data by authoring:
This case will be described with reference to FIGS. In FIG. 13, the same steps as those in FIG. 10 are denoted by the same step numbers, and description thereof will be omitted as appropriate.
[0133]
In this case, by combining the recording processes in the three cases described above, the authoring system previously generates the TS object, the logical information file data, and the like (step S81), and then performs the switching control performed by the formatter 608. The process up to the process is terminated (step S82). Thereafter, the information obtained by this operation is sent as disk image data D5 to the modulator 606 installed before and after the disk master cutting machine (step S83), and the master is created by this cutting machine (step S84).
[0134]
(Ii) Configuration and operation of playback system:
Next, with reference to FIG. 9 and FIG. 14, a specific configuration and operation of each component constituting the playback system in the information recording / playback apparatus 500 will be described.
[0135]
The user interface 720 inputs a title to be reproduced from the optical disc 100, reproduction conditions thereof, and the like to the system controller as user input I2 such as title information. At this time, in the user interface 720, under the control of the control signal Sc4 from the system controller 520, input processing corresponding to the content to be reproduced, such as selection via a title menu screen, is possible.
[0136]
In response to this, the system controller 520 performs disc reproduction control on the optical disc 100, and the optical pickup 502 sends a read signal S 7 to the demodulator 506.
[0137]
The demodulator 506 demodulates the recording signal recorded on the optical disc 100 from the read signal S7 and outputs it as demodulated data D8. Logical information file data (that is, the file system 105, the disk information file 110, the P list information file 120, and the object information file 130 shown in FIG. 3) included in the demodulated data D8 as an unmultiplexed information portion is stored. , Supplied to the system controller 520. Based on the logical information file data, the system controller 520 executes various reproduction controls such as a reproduction address determination process and control of the optical pickup 502.
[0138]
On the other hand, the demultiplexer 508 demultiplexes the TS object data as the multiplexed information portion included in the demodulated data D8 under the control of the control signal Sc2 from the system controller 520. Here, when the access to the reproduction position address is completed by the reproduction control of the system controller 520, the control signal Sc2 is transmitted so as to start demultiplexing.
[0139]
From the demultiplexer 508, a video packet, an audio packet, and a sub-picture packet are sent out and supplied to the video decoder 511, the audio decoder 512, and the sub-picture decoder 513, respectively. Then, the video data DV, the audio data DA, and the sub picture data DS are decoded.
[0140]
Note that the PAT or PMT packets included in the transport stream shown in FIG. 6 are included as part of the demodulated data D8, but are discarded by the demultiplexer 508.
[0141]
The adder 514 receives the control by the control signal Sc3 instructing mixing from the system controller 520, and the video data DV and the sub picture data DS decoded by the video decoder 511 and the sub picture decoder 513, respectively, at a predetermined timing. Mix or superimpose. The result is output as a video output from the information recording / reproducing apparatus 500 to, for example, a television monitor.
[0142]
On the other hand, the audio data DA decoded by the audio decoder 512 is output as an audio output from the information recording / reproducing apparatus 500 to, for example, an external speaker.
[0143]
Here, a specific example of the reproduction processing routine by the system controller 520 will be described with reference to FIG.
[0144]
In FIG. 14, as an initial state, recognition of the optical disk 100 by the reproduction system and volume structure and file structure recognition by the file system 105 (see FIG. 3) have already been performed by the system controller 520 and the file system / logical structure reader 522 therein. And it is finished. Here, a processing flow after acquiring the total number of titles from the disc general information 112 in the disc information file 110 and selecting one of the titles will be described.
[0145]
First, the user interface 720 selects a title (step S11), and the system controller 520 acquires information related to the playback sequence from the reading result of the file system / logical structure reader 522. Specifically, information indicating the processing playlist structure of the logical hierarchy and information (see FIG. 7) of each item constituting the information are acquired (step S12). Thereby, the reproduction target is determined (step S13).
[0146]
Subsequently, acquisition of the object information file 130 related to the TS object to be reproduced is executed. Particularly in the present embodiment, AU (Associate Unit) information 132I and PU (Presentation Unit) information 302I, which will be described later, are also acquired as information stored in the object information file 130 (Step S14). With the acquired information, the above-described association from the logical hierarchy to the object hierarchy (see FIG. 7) is performed.
[0147]
Subsequently, after determining an object to be reproduced and a reproduction address based on the information acquired in step S14 (step S15), processing of the object hierarchy is started, that is, reproduction is actually started (step S16). .
[0148]
During playback, it is monitored whether or not a “scene switching” command input corresponding to the switching of the PU 302 in the AU 132 based on the AU information 132I and the PU information 302I is performed (step S17). Here, if there is a command input for “scene switching” (step S17: Yes), the process returns to step S15, and the processes in steps S15 to S17 are repeated. On the other hand, if there is no “scene switch” command input (step S17: No), it is determined whether there is a command input for ending the reproduction process (step S18). If there is no command input for ending (step S18: No), the process returns to step S11, and the processes in steps S11 to S18 are repeated. On the other hand, if there is a command input for termination (step S18: Yes), a series of reproduction processing is terminated.
[0149]
(Access flow during playback)
Next, referring to FIG. 15, the flow of access at the time of reproduction in the information recording / reproducing apparatus 500 using AU (associate unit) information 132I and PU (presentation unit) information 302I, which is one of the features of this embodiment. A description will be given together with the logical structure of the optical disc 100. FIG. 15 conceptually shows the entire access flow during reproduction in relation to the logical structure of the optical disc 100.
[0150]
In FIG. 15, the logical structure of the optical disc 100 is roughly divided into three hierarchies: a logical hierarchy 401, an object hierarchy 403, and a logic-object association hierarchy 402 that associates these two hierarchies with each other.
[0151]
Among these, the logical hierarchy 401 is a hierarchy that logically specifies various logical information for reproducing a desired title at the time of reproduction, a playlist to be reproduced, and the contents of the playlist. In the logical hierarchy 401, disc information 110d indicating all titles 200 and the like on the optical disc 100 is described in the disc information file 110 (see FIG. 3), and reproduction sequence information 120d of all contents on the optical disc 100 is further recorded. Is described in the playlist information file 120 (see FIG. 3). More specifically, as the playback sequence information 120d, the configuration of one or a plurality of playlists 126 is described in each title 200, and the configuration of one or a plurality of items 204 is described in each playlist 126. Yes. At the time of access at the time of reproduction, the title 200 to be reproduced is specified by such a logical hierarchy 401, the playlist 126 corresponding to this is specified, and the item 204 corresponding to this is specified.
[0152]
Subsequently, the logic-object association hierarchy 402 specifies the combination and configuration of the TS object data 140d, which is entity data, based on the information specified in the logical hierarchy 401 in this way, and from the logical hierarchy 401 to the object hierarchy 403. This is a hierarchy that specifies the attribute of the TS object data 140d to be reproduced and its physical storage address so as to perform address conversion to. More specifically, in the logic-object association hierarchy 402, object information data 130d that classifies a group of contents constituting each item 204 into units of AU 132 and subdivides each AU 132 into units of PU 302 includes object information data 130d. It is described in the file 130 (see FIG. 3).
[0153]
Here, “PU (presentation unit) 302” is an example of a “subgroup” in the present application, and is a unit in which a plurality of elementary streams are associated with each other for each playback switching unit. For example, this is a unit in which elementary stream packet IDs (ES_PID) and the like for each vision of “multi-vision type title” such as title # 1 in the specific examples shown in FIGS. If there are three audio streams in the PU 302, the user can freely switch between the three audios (for example, audio for each language) during playback of this vision.
[0154]
On the other hand, the “AU (association unit) 132” is a unit in which a plurality of elementary streams such as video streams in a TS object used in one title are collected, and is composed of a set of one or a plurality of PUs 302. More specifically, the unit is a unit in which elementary stream packet IDs (ES_PID) are collected for each TS object indirectly through the PU 302. This AU 132 corresponds to a set of a plurality of programs or a plurality of programs having a specific relationship with each other in view of content, such as a plurality of programs or a plurality of programs that can be switched to each other in multi-source broadcasting. The PU 302 belongs to the same AU 132 and corresponds to a plurality of programs or a set of one or more elementary streams that respectively configure a plurality of programs that can be switched to each other by a user operation during reproduction.
[0155]
Therefore, if the AU 132 to be played back is specified, and further the PU 302 is specified, the elementary stream to be played back is specified. That is, a desired elementary stream can be reproduced from the multiplex recording from the optical disc 100 without using the PAT or PMT shown in FIG.
[0156]
A more specific data structure of the AU information 132I and the PU information 302I that define the AU 132 and the PU 302 will be described later with reference to FIG.
[0157]
Here, the elementary stream that is actually reproduced is specified or specified by the ES_PID that is the packet ID (see FIG. 6) of the elementary stream from the PU information 302I. At the same time, information indicating the reproduction start time and end time is converted into address information of the elementary stream, so that the content in the specific area (or specific time range) of the specific elementary stream is reproduced.
[0158]
In this manner, in the logical-object association hierarchy 402, the address conversion from the logical address related to each item 204 to the physical address related to each PU 302 is executed.
[0159]
Subsequently, the object hierarchy 403 is a physical hierarchy for reproducing the actual TS object data 140d. In the object hierarchy 403, TS object data 140d is described in the object data file 140 (see FIG. 3). More specifically, TS packets 146 constituting a plurality of elementary streams (ES) are multiplexed at each time, and these are arranged along the time axis to form a plurality of elementary streams. (See FIG. 5). The plurality of TS packets multiplexed at each time are associated with the PU 302 specified in the logic-object association layer 402 for each elementary stream. It should be noted that a plurality of PUs 302 are associated with a single elementary stream (for example, an elementary stream related to the same audio data is used in common among a plurality of switchable programs or a plurality of programs, or the same It is also possible to use an elementary stream related to the sub-picture data in common).
[0160]
Thus, in the object hierarchy 403, actual object data is reproduced using the physical address obtained by the conversion in the logic-object association hierarchy 402.
[0161]
As described above, the access to the optical disc 100 during reproduction is executed by the three layers shown in FIG.
[0162]
(Specific example of data structure recorded on optical disc)
Next, referring to FIG. 16 to FIG. 21, in addition to PAT (program association table) and PMT (program map table) which are one of the features in the transport stream, it is one of the features of this embodiment. A data structure on the optical disc 100 in which AU (Associate Unit) information and PU (Presentation Unit) information is recorded will be described.
[0163]
In this specific example, a specific example of a data configuration constructed on the optical disc 100 in the case where two titles are configured in the optical disc 100 for objects by three TS objects # 1, # 2, and # 3 will be described. . Here, FIG. 16 schematically shows the data structure of TS objects # 1 and # 2 including a plurality of elementary streams in this specific example, and FIG. 17 shows the same in this specific example. FIG. 18 schematically shows the data structure of the PAT and PMT of the TS # 1 object, and FIG. 18 schematically shows the data structure of the PAT and PMT of the TS # 2 object in this specific example. FIG. 19 schematically shows the data structure of the TS # 3 object in this specific example, and FIG. 20 schematically shows the data structure of the PAT and PMT of the TS # 3 object in the specific example. It is shown in Further, FIG. 21 schematically shows a data configuration finally constructed on the optical disc 100 in the same specific example.
[0164]
First, as shown in FIG. 16, the title # 1 uses the TS # 1 object and the TS # 2 object as they are, with the transport stream used in digital broadcasting as two TS objects 142 (see FIG. 3). Configure. In “program 1” in FIG. 16, the program map packet ID (“Program Map PID” in FIG. 16) is “100” and “200”, respectively, and the program number (“Program number” in FIG. 16). Are two-way broadcasts using two programs “1” and “2”, respectively. On the other hand, “Program 2” in FIG. 16 is a normal broadcast using one program whose program map packet ID is “300” and whose program number is “3”. For example, the elementary stream (ES) corresponding to the program of program number “1” is “Video 1 (video stream 1)”, “Audio 1 (audio stream 1)”, and “Audio 2 (audio stream 2)”. The packet IDs (ES_PID) of these elementary streams are “101”, “102”, and “103”, respectively (see FIG. 6). The contents of other elementary streams (ES) and packet IDs (ES_PID) are also as shown in FIG.
[0165]
As shown in FIG. 17, in this specific example, for the TS # 1 object, the PAT (program association table) and the PMT (program map table) at the time of broadcasting are such that three PMTs can be specified by one PAT and It is configured so that individual TS packets of elementary streams to be reproduced by each PMT can be specified.
[0166]
More specifically, for the PAT, its packet ID (PID) is set to a specified value such as “000”, for example, so that from among a large number of packets multiplexed at each time (see FIG. 6). First, the PAT can be specified. Further, by referring to the contents of the specified PAT, the PMT packet ID (for example, “100”) for “Program 1 (Program 1)” and the PMT packet ID (for “Program 2 (Program 2)”) ( For example, “200”) or PMT packet ID of “Program 3 (Program 3)” (for example, “300”) identifies the PMT from a number of packets multiplexed at each time (see FIG. 6). Is possible.
[0167]
Further, by referring to the contents of the PMT thus identified, the TS packet in which the content to be reproduced is packetized is identified from among a large number of packets multiplexed at each time (see FIG. 6). Is possible. For example, when the PMT for “program 1” is specified, the packet ID of the TS packet for “video stream 1” (for example, “101”) and the packet ID of the TS packet for “audio stream 1” (for example, “ 102 ") or the packet ID of the TS packet for" audio stream 2 "(for example," 103 "), the TS packet can be specified. Similarly, when the PMT for “Program 2” and the PMT for “Program 3” are specified, the TS packet to be reproduced can be specified.
[0168]
In this specific example, in particular, a block of data constituting a series of transport streams used for broadcasting (for example, a unit broadcast continuously without CM (commercial) or the like) is referred to as a “TS object” (see FIG. 3). ). At the time of broadcasting, first, two programs are transmitted using the TS # 1 object as three programs. After that, “Program 2” ends with the passage of time, and the “Program 1” continues with the TS # 2 object across the CM. "Is broadcast. Therefore, the program sequence is also switched on the way.
[0169]
Further, as shown in FIG. 18, in this specific example, for the TS # 2 object, the PAT and PMT at the time of broadcasting are elementary streams to be reproduced by each PMT so that two PMTs can be specified by one PAT. The individual TS packets can be specified.
[0170]
As shown in FIGS. 15 to 18, in this specific example, a single title # 1 is configured using the TS # 1 object and the TS # 2 object at the time of broadcasting, without the CM content. Yes.
[0171]
Furthermore, as shown in FIG. 19, in this specific example, the title # 2 is configured using a TS # 3 object. This TS # 3 object is authored so as to be stored in advance as ROM content, and in addition to video data and audio data, in particular, element stream for sub-picture data (ie, ES ES in FIG. 19). It is assumed that there are two “Sub Picture 1” and “Sub Picture 2”) as the contents of.
[0172]
In this specific example, as shown in FIG. 20, for the TS # 3 object constituting the title # 2, its PAT and PMT also have a simple configuration.
[0173]
The data structure constructed in the optical disc 100 described with reference to FIGS. 15 to 20 is summarized as shown in FIG.
[0174]
That is, in FIG. 21, a data structure in which two titles are constructed from three TS objects is constructed on the optical disc 100. In particular, the dual-programmed “Program 1” title on the optical disc 100 is a “multi-vision” type (ie, a type that can be freely switched by the user) similar to “angle switching” on a DVD. Has been logically rebuilt as. At the time of this switching, it is assumed that the “Audio 1” audio stream of the TS # 1 object and the “Audio 6” audio stream of the TS # 2 object are not used. Elementary streams are not used.
[0175]
(Structure of each information file)
Next, referring to FIG. 22 to FIG. 25, various information files constructed on the optical disc 100 of the present embodiment, that is, (1) disc information file 110 and (2) playlist information described with reference to FIG. The data structures of the file 120, (3) the object information file 130, and (4) the object data file 140 will be described with specific examples.
[0176]
(1) Disc information file:
First, with reference to FIGS. 22 and 23, the disk information file 110 will be described in detail with a specific example. FIG. 22 schematically shows a specific example of the data structure of the disc information file 110, and FIG. 23 shows a specific example of the data structure of the title information table (table) 114 included therein. It is shown as an example.
[0177]
As shown in FIG. 22, in this specific example, the disc information file 110 stores disc comprehensive information 112, a title information table 114, and other information 118.
[0178]
Of these, the disc comprehensive information 112 is, for example, comprehensive disc information such as disc volume information indicating the serial number of a series composed of a plurality of optical discs 100 and total title number information.
[0179]
The title information table 114 stores all playlists constituting each title and chapter information in the title as other information for each title, for example, title pointer information, title # 1 information, title # 2 information, Comprising ... Here, the “title pointer information” is the storage address information of the title #n information, that is, the storage indicating the storage position of the title #n information in the title information table 114 as indicated by the arrow in FIG. Address information, which is described by a relative logical address. The number of titles in the optical disc 100 is arranged in the order of titles as relative logical addresses. Note that the data amount of each such storage address information may be a fixed byte or a variable byte.
[0180]
Further, the other information 118 is, for example, information on each title such as a sequential type and a branch type title already described with reference to FIG. 8 and the total number of playlists.
[0181]
In the specific examples shown in FIG. 16 to FIG. 21, each of the titles is simply composed of one playlist title. Therefore, for example, in the case of this specific example, the title information table 114 (see FIG. 3) stored in the disc information file 110 shown in FIG. 22 has relatively simple contents as shown in FIG. It is described as having.
[0182]
(2) Playlist information file:
Next, with reference to FIG. 24, the playlist information file 120 will be described in detail with a specific example. FIG. 24 schematically shows a specific example of the data structure in the playlist information table (table) 121 constructed in the playlist information file 120.
[0183]
As shown in FIG. 24, in this specific example, in the playlist information file 120, the playlist general information 122, the playlist pointer table 124, the playlist # 1 information table, and the playlist # 2 information for each field. A table 126 is stored as a playlist information table 121 (see FIG. 3).
[0184]
Each field may have a structure in which a required number of tables can be added. For example, if there are four playlists, the number of corresponding folds may be increased to four, and this also applies to the item information table.
[0185]
Among these, the playlist general information (P list general information) 122 describes the size of the playlist table, the total number of playlists, and the like.
[0186]
In the playlist pointer table (P list pointer table) 124, the address of each playlist description position is stored as a relative logical address in the playlist information table 126 as indicated by the arrow in FIG. The
[0187]
The playlist # 1 information table (P list # 1 information table) 126 stores general information about the playlist # 1, an item information table (P list Item information Table) of the playlist # 1, and other information. . The playlist # 2 information table 126 also describes the same type of information related to the playlist # 2.
[0188]
In the “item information table (Item information table)”, item information for the total number of items constituting one program list is stored. Here, the AU number in the AU (Associate Unit) table described in “Item # 1 (Item # 1 information)” or “Item # 2 (Item # 2 information)” is the TS used for the item reproduction. This is an AU number that stores information for specifying an object address and each elementary stream (that is, a video stream, an audio stream, or a sub-picture stream) in the TS object used for the ilem reproduction.
[0189]
(3) Object information file:
Next, the object information file 130 will be described in detail with a specific example with reference to FIG. FIG. 25 shows the data structure of the AU (associate unit) table 131 (see FIG. 3) constructed in the object information file 130 and the ES (elementary stream) map table 134 (see FIG. 3) associated therewith. A specific example is shown schematically.
[0190]
As shown in FIG. 25, in this specific example, an object information table (object information table) is stored in the object information file 130. The object information table includes an AU table 131 shown in the upper part of the figure and an ES map table 134 shown in the lower part.
[0191]
In the upper part of FIG. 25, the AU table 131 may have a structure in which as many tables as necessary for each field (Field) can be added. For example, if there are four AUs, the fold may be increased to four.
[0192]
The AU table 131 stores “AU table general information” in which the number of AUs, a pointer to each AU, and the like are described in another field (Field), and “other information”.
[0193]
In the AU table 131, the AU information 132I indicating the ES table index #m (ES_table Index #m) in each PU #m corresponding to each AU #n is used as the index number (Index) of the corresponding ES map table 134. Number = ...) is described. Here, “AU” is a unit corresponding to a “program” in television broadcasting as described above (in particular, in the case of “multi-vision type” broadcasting, a plurality of “visions” that can be switched are combined. This unit includes one or more PUs which are playback units. Further, “PU” is a set of mutually switchable elementary streams included in each AU as described above, and the ES table index # corresponding to each PU is specified by the PU information 302I. For example, when multi-view content is configured by AU, a plurality of PUs are stored in AU, and each PU has a plurality of elementary stream packet IDs indicating packets configuring the content of each view. A pointer to is stored. This indicates an index number in the ES map table 134 described later.
[0194]
In the lower part of FIG. 25, the ES map table 134 includes ES map table general information (ES_map table general information), a plurality of indexes #m (m = 1, 2,...), “Others” for each field (Field). Is stored.
[0195]
The “ES map table general information” describes the size of the ES map table, the total number of indexes, and the like.
[0196]
“Index #m” is configured to include elementary stream packet IDs (ES_PID) of all elementary streams used for reproduction, index numbers corresponding to the elementary stream packet IDs, and address information of the elementary streams.
[0197]
With this configuration, the elementary stream packet ID (ES_PID) of the actual elementary stream can be acquired from the index number of the ES map 134 specified from the AU table 131. Further, since the address information of the elementary stream corresponding to the elementary stream packet ID can be acquired at the same time, the object data can be reproduced based on the information.
[0198]
According to the data structure of the optical disc 100 described above, even when a new title is added to the optical disc 100, it is useful because necessary information can be easily added. On the other hand, for example, even if some information becomes unnecessary as a result of editing or the like, it is not necessary to simply refer to the information, and it is not necessary to actually delete the information from the table. Because it is beneficial.
[0199]
In FIG. 25, ES_PIDs that are not referred to from the upper AU table 131 are also described for each index in the lower ES map table 134. However, the ES_PIDs that are not referred to do not have to be described in this way. However, if the ES map table 134 having higher versatility is created by describing the ES_PID that is not referred to in this way, the ES map table is used when the content is reedited, for example, when authoring is performed again. The advantage is that there is no need to rebuild.
[0200]
(4) Object data file:
Next, the object data file 140 will be described.
[0201]
In this specific example, three TS objects are stored in the object data file 140 as the object data to be actually reproduced.
[0202]
The transport stream defined by the PAT and PMT described above can be stored as it is or processed as described with reference to FIG. 9, and information for specifying an elementary stream to be reproduced therein Is stored in the above-described object information file 130 (see FIG. 25). The object information file 130 is associated with the actual data in the object data file 140.
[0203]
As described above in detail with reference to FIGS. 1 to 25, according to the present embodiment, TS objects created based on different PAT and PMT construction rules, such as different local rules for each country. 142, even if the TS object 142 is stored in the optical disc 100 without changing the structure of the TS object 142, the AU information 132I and the PU information 302I can be used for reproduction without any problem. .
[0204]
According to the present embodiment, all or a part of data of the TS object 142 (for example, only “Program 1” of the TS # 1 object 142 as shown in the above-described specific example, or further includes “Program 1”. It is convenient because it is possible to logically and easily construct a title 200 or the like that links and reproduces a title 200 or a plurality of TS objects 142 by only the time zone). In addition, the AU 132 is formed by grouping the related elementary streams at this time, and the elementary stream packet ID (ES_PID) is directly indicated by each AU 132. Regardless of the definition contents of the PAT and PMT of the TS object 142 created by the broadcasting system based on the local rules) (that is, the TS object 142 is analyzed based on the definition rule or interpretation rule in the information reproducing apparatus or player). Without replaying). In other words, when the transport stream is stored in the optical disc 100, there is no need to reconstruct the PAT or PMT. As described above, even when a plurality of TS objects 142 whose PAT and PMT construction rules are not unified are recorded on the same optical disc 100, a multi-multivision type or multi-view type program or program is stored in the transformer stored in the optical disc 100. It is possible to reproduce from the port stream without any problem (that is, freely and appropriately switching the vision or view according to the user's request), which is very convenient practically. Therefore, reproduction compatibility can be easily ensured with a relatively simple player configuration.
[0205]
Furthermore, according to the present embodiment, by constructing the PU 302 structure in each AU 132, a set of elementary streams (for example, video stream, Audio stream, etc.) can be easily determined, and an audio stream switching function in one vision can be realized relatively easily.
[0206]
According to the present embodiment, even when a new elementary stream such as a sub-picture is added to the created TS object 142, the predefined elementary stream packet ID (ES_PID) is not changed. It is possible to simply reconstruct a stream by simply adding a description of elementary stream packet ID, PAT, PMT, etc. of a new elementary stream and performing only multiplexing of all data. As described above, the logical structure of the optical disc 100 in this embodiment can simplify the authoring work for creating the ROM type title and can be widely applied to a home recorder.
[0207]
In addition, according to the present embodiment, the AU information 132I and the PU information 302I need only be maintained when editing the content (that is, it is not necessary to rewrite the PAT or PMT), so the PAT or PMT of the material is not minded. It is very convenient to edit.
[0208]
In the above-described embodiment, the optical disc 100 as an example of the information recording medium and the recorder or player related to the optical disc 100 as an example of the information reproducing / recording apparatus have been described. However, the present invention is limited to the optical disc and the recorder or player. Instead, the present invention can also be applied to various information recording media corresponding to other high-density recording or high transfer rate, and its recorder or player.
[0209]
The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and information recording accompanying such a change is possible. A data structure including a medium, an information recording device and method, an information reproducing device and method, an information recording and reproducing device and method, a computer program for recording or reproduction control, and a control signal is also included in the technical scope of the present invention. is there.
[0210]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to multiplex record a large amount of content information such as a plurality of programs or programs transmitted in a transport stream, for example. Can be played.
[Brief description of the drawings]
FIG. 1 shows a basic structure of an optical disc as an embodiment of an information recording medium of the present invention, the upper part is a schematic plan view of an optical disc having a plurality of areas, and the lower part associated therewith is It is a schematic conceptual diagram of the area structure in radial direction.
FIG. 2 is a schematic conceptual diagram of a conventional MPEG2 program stream (FIG. 2A) and a schematic conceptual diagram of an MPEG2 transport stream used in this embodiment (FIG. 2B).
FIG. 3 is a diagram schematically showing a data structure recorded on the optical disc of the present embodiment.
4 is a diagram schematically showing details of a data structure in each object shown in FIG. 3; FIG.
FIG. 5 shows that the upper stream program # 1 elementary stream and the middle program # 2 elementary stream are multiplexed to form a transport stream for these two programs. It is a figure which shows a mode notionally making a horizontal axis the time axis.
FIG. 6 conceptually shows an image of TS packets multiplexed in one transport stream as a packet arrangement along time in the present embodiment.
FIG. 7 is a diagram schematically showing a logical configuration of data on an optical disc in the embodiment, focusing on development from a logical hierarchy to an object hierarchy or an entity hierarchy.
8 is a conceptual diagram schematically showing two specific examples of a logical configuration in a playlist that constitutes one title shown in FIG.
FIG. 9 is a block diagram of an information recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 10 is a flowchart showing a recording operation (part 1) of the information recording / reproducing apparatus in the embodiment.
FIG. 11 is a flowchart showing a recording operation (part 2) of the information recording / reproducing apparatus in the embodiment.
FIG. 12 is a flowchart showing a recording operation (part 3) of the information recording / reproducing apparatus in the embodiment.
FIG. 13 is a flowchart showing a recording operation (part 4) of the information recording / reproducing apparatus in the embodiment;
FIG. 14 is a flowchart showing a reproducing operation of the information recording / reproducing apparatus in the present embodiment.
FIG. 15 is a diagram conceptually showing the entire access flow at the time of reproduction in relation to the logical structure of the optical disc in the present embodiment.
FIG. 16 is a diagram schematically showing the data structure of TS objects # 1 and # 2 including a plurality of transport streams in a specific example according to the present embodiment.
FIG. 17 is a diagram schematically showing the data structure of PAT and PMT of a TS # 1 object in a specific example according to the present embodiment.
FIG. 18 is a diagram schematically showing a data structure of PAT and PMT of a TS # 2 object in a specific example according to the present embodiment.
FIG. 19 is a diagram schematically showing a data structure of a TS # 3 object in a specific example according to the present embodiment.
FIG. 20 is a diagram schematically showing a data structure of PAT and PMT of a TS # 3 object in a specific example according to the present embodiment.
FIG. 21 is a diagram schematically showing a data configuration finally constructed on an optical disc in a specific example according to the present embodiment.
FIG. 22 is a diagram schematically showing a specific example of the data structure of a disc information file in a specific example according to the present embodiment.
FIG. 23 is a diagram schematically showing a specific example of a data structure of a title information table included in a disc information file in a specific example according to the present embodiment.
FIG. 24 is a diagram schematically showing a specific example of a data structure in a playlist information table constructed in a playlist information file in a specific example according to the present embodiment.
FIG. 25 is a diagram schematically showing a specific example of a data structure in an AU table constructed in an object information file and an ES map table associated therewith in a specific example according to the present embodiment.
[Explanation of symbols]
100 optical disc
105 File system
110 Disk information file
120 playlist information file
126 playlists
130 Object information file
131 AU (association unit) table
132 AU
132I AU information
140 Object data file
142 TS (Transport Stream) Object
146 TS packet
200 titles
204 play items
302 PU (presentation unit)
302I PU information
500 Information recording / reproducing apparatus
502 Optical pickup
506 Demodulator
508 Demultiplexer
511 Video decoder
512 audio decoder
513 Sub-picture decoder
520 system controller
606 modulator
608 formatter
610 TS object generator
611 video encoder
612 Audio Encoder
613 Sub-picture encoder

Claims (20)

Entire series of content information is a stream that is received from and external device Ri name includes a plurality of portion streams constructed s husband stream is physically multiplexed recording the information being recorded in units of packets is accessible unit A medium,
An object data file for storing object data consisting of a plurality of packets each of which is a logically accessible unit and stores each piece of the content information;
A reproduction sequence information file for storing reproduction sequence information defining a reproduction sequence of the object data stored in the object data file;
As reproduction control information for controlling reproduction of the object data file, an object information file storing correspondence definition information defining correspondence relations between a plurality of packets multiplexed at the same time and the plurality of partial streams. With
The correspondence definition information, Ri na contains table information indicating the packet identification number assigned uniquely across multiple packets to be multiplexed on the same time by the partial stream,
Wherein the object data file, wherein the object information file, the information recording medium characterized Rukoto recorded in each separate recording area.   2. The information recording medium according to claim 1, wherein the table information indicates an address on the information recording medium corresponding to the packet identification number in addition to the packet identification number. The entire stream includes information for indicating a plurality of partial stream packets corresponding to the same time,
The table information includes information recording medium according to claim 1 or 2, characterized in Rukoto is generated based on the information for indicating that a packet of the plurality of portion streams corresponding to the same time.   4. The information recording medium according to claim 1, wherein the entire stream includes two or more partial streams including main video information as the series of content information. 5. On the information recording medium, the entire stream is a stream that is received from and external device Ri name contains each composed plurality of partial streams from a series of content information, a unit of packet which is a physically accessible unit An information recording device for multiplex recording,
A first recording means for recording an object data file storing object data comprising a plurality of packets each of which is a logically accessible unit and stores each piece of the content information;
Second recording means for recording a reproduction sequence information file for storing reproduction sequence information defining a reproduction sequence of object data stored in the object data file;
As the playback control information for controlling the playback of the object data file, an object information file that stores correspondence definition information that defines the correspondence between a plurality of packets multiplexed at the same time and the plurality of partial streams is recorded. And a third recording means for
The third recording means includes the table information indicating that the correspondence definition information includes, for each partial stream, a packet identification number uniquely given between a plurality of packets multiplexed at the same time. Record the object information file ,
And the object data file, wherein the object information file, the information recording apparatus characterized Rukoto recorded in each separate recording area.   6. The information recording apparatus according to claim 5, wherein the table information indicates an address on the information recording medium corresponding to the packet identification number in addition to the packet identification number. The entire stream is composed of at least a part of an MPEG2 transport stream that is digitally broadcast and received by a set top box,
The first recording means includes the correspondence definition information defining the correspondence relationship included in the received whole stream so as to be included in a part of the object data in a form multiplexed with the content information. The information recording apparatus according to claim 5 or 6, wherein an object data file is recorded. On the information recording medium, the entire stream is a stream that is received from and external device Ri name contains each composed plurality of partial streams from a series of content information, a unit of packet which is a physically accessible unit An information recording method for multiplex recording,
A first recording step of recording an object data file storing object data consisting of a plurality of packets each of which is a logically accessible unit and stores the pieces of content information;
A second recording step of recording a reproduction sequence information file for storing reproduction sequence information defining a reproduction sequence of the object data stored in the object data file;
As the playback control information for controlling the playback of the object data file, an object information file that stores correspondence definition information that defines correspondence between a plurality of packets multiplexed at the same time and the plurality of partial streams is recorded. And a third recording step.
In the third recording step, the correspondence definition information includes table information indicating a packet identification number that is uniquely given among a plurality of packets multiplexed at the same time for each partial stream. Record the object information file ,
Wherein the object data file, wherein the object information file, the information recording method comprising Rukoto recorded in each separate recording area.   9. The information recording method according to claim 8, wherein the table information indicates an address on the information recording medium corresponding to the packet identification number in addition to the packet identification number. The entire stream is composed of at least a part of an MPEG2 transport stream that is digitally broadcast and received by a set top box,
The first recording step includes one piece of correspondence definition information defining the correspondence relation included in the received whole stream so as to be included in a part of the object data in a form multiplexed with the content information. 10. The information recording method according to claim 8, wherein an object data file is recorded. An information reproducing apparatus for reproducing at least a part of the recorded whole stream from the information recording medium according to any one of claims 1 to 4,
Reading means for physically reading information from the information recording medium;
Reproduction that reproduces the object data by executing demultiplexing on the information read by the reading unit based on the reproduction control information and the reproduction sequence information included in the information read by the reading unit An information reproducing apparatus comprising: means.   The reproduction means corresponds to one or a plurality of partial streams to be reproduced among the plurality of multiplexed packets by the packet identification number indicated by the table information included in the information read by the reading means. The information reproducing apparatus according to claim 11, wherein the information is specified. An information reproducing method for reproducing at least a part of the recorded whole stream from the information recording medium according to any one of claims 1 to 4,
A reading step of physically reading information from the information recording medium;
Reproduction that reproduces the object data by performing demultiplexing on the information read by the reading step based on the reproduction control information and the reproduction sequence information included in the information read by the reading step An information reproduction method comprising the steps of:   The reproduction step corresponds to one or a plurality of partial streams to be reproduced among the plurality of multiplexed packets by the packet identification number indicated by the table information included in the information read by the reading step. 14. The information reproducing method according to claim 13, wherein the information is specified. An information recording / reproducing apparatus for recording the entire stream on the information recording medium according to any one of claims 1 to 4 and reproducing at least a part of the recorded entire stream.
First recording means for recording the object data file;
Second recording means for recording the reproduction sequence information file;
Third recording means for recording the object information file;
Reading means for physically reading information from the information recording medium;
Reproduction that reproduces the object data by executing demultiplexing on the information read by the reading unit based on the reproduction control information and the reproduction sequence information included in the information read by the reading unit An information recording / reproducing apparatus comprising: means. An information recording / reproducing method for recording the whole stream on the information recording medium according to any one of claims 1 to 4 and reproducing at least a part of the recorded whole stream,
A first recording step for recording the object data file;
A second recording step of recording the reproduction sequence information file;
A third recording step for recording the object information file;
A reading step of physically reading information from the information recording medium;
Reproduction that reproduces the object data by performing demultiplexing on the information read by the reading step based on the reproduction control information and the reproduction sequence information included in the information read by the reading step An information recording / reproducing method comprising the steps of:   A computer program for recording control for controlling a computer provided in the information recording apparatus according to any one of claims 5 to 7, comprising: the first recording means; the second recording means; A computer program for recording control, which functions as at least part of the third recording means.   A reproduction control computer program for controlling a computer provided in the information reproduction apparatus according to claim 11 or 12, wherein the computer is caused to function as at least part of the reproduction means. Computer program.   16. A computer program for recording / reproducing control for controlling a computer provided in the information recording / reproducing apparatus according to claim 15, wherein the computer is the first recording unit, the second recording unit, and the third recording unit. And a computer program for recording / reproducing control, which is caused to function as at least part of the reproducing means. Entire series of content information is a stream that is received from and external device Ri name includes a plurality of portion streams s composed each stream are multiplexed hear a unit of packet which is a physically accessible unit ,
An object data file for storing object data consisting of a plurality of packets each of which is a logically accessible unit and stores each piece of the content information;
A reproduction sequence information file for storing reproduction sequence information defining a reproduction sequence of the object data stored in the object data file;
As reproduction control information for controlling reproduction of the object data file, an object information file storing correspondence definition information that defines correspondence between a plurality of packets multiplexed at the same time and the plurality of partial streams. Have
The correspondence definition information, Ri na contains table information indicating the packet identification number assigned uniquely across multiple packets to be multiplexed on the same time by the partial stream,
Wherein the object data file, and is the object information file, the data structure including a control signal characterized by Rukoto recorded in each separate recording area.

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