JPH0955673A - Transmitter for isdb and its receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To acquire area dependent information from a broadcast signal semi- automatically. SOLUTION: The receiver is an ISDB receiver that receives an ISDB broadcast signal resulting from digitizing various main information sets such as video, audio and data signals together with additional information such as control information, packet processing and multiplexing the results. The receiver is provided with an ISDB tuner 46, plural decoding sections 52, 56 for the main information, a memory 74 storing a decoding output from area dependent information, and a monitor 54 for the main information. The decoding section 56 decoding the area dependent information receives an area information code (area code) from a control section 70 or a GPS device 60 acting like a position discrimination means and selects the area dependent information coincident with the received area code and it is stored in the memory 74. Furthermore, the stored information is displayed on the monitor 54. Since it is required to provide only the area code, the area dependent information is acquired semi- automatically and the information is acquired very simply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitter suitable for application to an ISDB broadcasting system or the like and a receiver thereof. For details, in addition to the broadcast signal, information specific to the area (area-specific information) is transmitted, and the receiving side searches for the area-specific information using the area code and displays it to display the area-specific information (weather map). , Maps, commercials, etc.) are available.

[0002]

2. Description of the Related Art With the development of digital technology, an interactive integrated digital broadcasting system (ISD) that digitizes various information including broadcasting signals in the broadcasting world
B (Integrated Services Digital Broadcasting) system is being researched and developed.

Specifically, the ISDB system is a multi-channel system including current broadcast signals (standard television signals, high-definition signals), data such as software and facsimiles, and voice, characters, figures, images and the like. This is a broadcasting system in which media information is digitized (encoded), integrated and multiplexed, and then subjected to modulation processing that matches the transmission mode and then transmitted and received.

When various kinds of information including a broadcast signal are integrated and multiplexed, in addition to these pieces of information, additional information used as control information on the receiving side can be simultaneously integrated and multiplexed and transmitted. The integrated ISDB broadcast signal (digital signal) is transmitted using a terrestrial wave, a satellite wave, an optical cable, or the like.

On the receiving terminal side, by receiving the integrated ISDB broadcast signal and discriminating the target signal, the signal can be displayed on the monitor and can be enjoyed as a normal television broadcast. It can be used to record (store) or transfer to another terminal.
Further, if the received additional information is used, the received information can be used according to the user's preference such as monitor control, recording control, and processing control for the monitored image. That is, it is possible to construct an interactive broadcasting system.

[0006]

Therefore, this ISD
If the B system is used, various additional information will be transmitted,
The more diverse, the better the service content for users,
A more interactive broadcasting system can be built.

In the current information transmission / reception system, like the captain system, various information such as sports and shopping accumulated in the information center (captain center) is selected using the telephone line, and the screen is displayed. Some allow you to select the information you need according to the instructions above.

This captain system is very convenient because the viewer (user) can obtain the necessary information only by using the telephone line and the television, but on the other hand, a large number of steps must be taken to select specific information. Therefore, it is a relatively troublesome task to select information in the vicinity of the viewer. There is also a problem that the telephone line must be used each time to use.

If a broadcasting system capable of multiplex transmission of multi-channel broadcast signals is constructed, it becomes possible to transmit information effective only in a specific area as a broadcast signal as described above, and the viewer can simply specify the specific information. It's very convenient because you can get a wealth of local information just by selecting a channel and a specific area.

Therefore, the present invention has been made to achieve such a problem, and is designed to transmit specific information such as regional information and selectively receive / store it. .

[0011]

In order to solve the above problems, in the ISDB transmission apparatus according to the present invention described in claim 1, various main information such as video, audio, data, etc. are added to the control information. In an ISDB transmitter that transmits a packetized and multiplexed ISDB broadcast signal after digitizing it together with information, regional information is used as the main information. It is characterized in that it is multiplexed with information and transmitted.

The ISD according to the present invention described in claim 2
In the B transmitter, the regional information is a map of the receiving place, a weather forecast of the receiving place, a commercial, and the like.

The ISD according to the present invention described in claim 3
In the B receiver, the ISDB receiver receives a packetized and multiplexed ISDB broadcast signal after digitizing various main information such as video, audio, and data together with additional information such as control information. The apparatus is provided with an ISDB tuner, a plurality of decoding means for the main information, a memory means for storing a decoded output obtained by decoding the regional information, and a main information monitoring means, respectively, for decoding the regional information. The area code is input to the decoding means, and the regional information matching the input area code is selected and stored in the memory means.

The ISD according to the present invention described in claim 4
In the B receiver, the area code is manually or automatically generated.

The ISD according to the present invention described in claim 5
In the receiver for B, a GPS device is used as an automatic generation means of the input area code, and the area information data detected from this is used as the area code.

The ISD according to the present invention described in claim 6
In the receiving device for B, the GPS device includes a GPS receiving section, a regional information code discriminating means, and a regional information code memory means, and the regional information code read from the memory means is a decoding means for the regional information. Is supplied as an information selection signal.

As main information, in addition to a broadcast signal of a program or the like, region-specific information rich in local colors unique to a number of regions covering the area where the broadcast signal can be received is multiplexed with a region code and received. The device decrypts and stores it. A region code is given to the decryption unit, and only region-specific information that matches the input region code is stored in the memory.

As the input area code, a code generated by the control unit can be used, or an automatically generated code can be used. As one means of automatic generation, a GPS (Global Positioning System) system that automatically determines the latitude and longitude where the device is placed and identifies the current position can be used. The area information code obtained from the GPS device is used as the area code, and this area code is given to the decoding unit. As a result, since only the regional information in the vicinity of the viewer is automatically stored in the memory means, the regional information can be easily used.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the ISDB according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION An embodiment of a transmission device for mobile use and a receiving device thereof will be described in detail with reference to the drawings.

FIG. 1 is a systematic diagram of a main part showing an embodiment of an ISDB transmission device 10 according to the present invention. In this example, as main information to be integrated and transmitted, for convenience of explanation,
Standard television signals, high-definition signals and various data information. Then, additional information such as control information is added to each of them and multiplexed. Various types of additional information can be considered. A time code or the like can be considered for the standard television signal or the high definition signal.

Referring to FIG. 1, the terminal 12a is supplied with the video signal SVN of the standard television signal, and the terminal 12b is supplied with the audio signal SAN accompanying it, and the encoding unit 14 appropriately selects the compression signal and the like. Encoding processing is performed.
The additional information generating means 16 operates in synchronization with this encoding process to generate additional information such as control information. In this example, since the time code is exemplified as the additional information, it is configured as the time code generator 16. The encoded standard television signal and the time code TC are multiplexed by the multiplexer 20.
And is multiplexed with other information.

A video signal SVH of the high-definition signal is supplied to the terminal 22a, and an audio signal SAH accompanying it is supplied to the terminal 22b, and an appropriate encoding process including compression etc. is performed by the encoding unit 24. In this example as the additional information generating means, the time code generator 26 is activated in synchronization with this encoding process to generate a predetermined time code.

Various data SD such as computer data and facsimile data is supplied to the terminal 28a, which is encoded by the encoder 30. At the same time, the additional information generating means 32 is activated to generate the corresponding additional information.
As the additional information, the type of data and the area designation for enlargement / reduction can be considered.

In the present invention, specific information (regional information) regarding a plurality of regions among the regions (service areas) where the broadcast signal can be received is used as one of the data. This regional information is the information peculiar to the region, such as the weather forecast for the region (the day, the next day, the week, the month, etc.), the telephone directory,
Maps, maps, government agencies, financial industry, markets, restaurants,
Maps centered on specific industries necessary for town information such as barbershops, business hours of specific industries, specific information closely related to the area such as service contents, and commercial information can be considered.

The regional information is information collected on the basis of, for example, each region (regardless of area) of the municipality existing in the area covered by the broadcast signal, and preferably the broadcast signal covers it. All municipalities in the service area are covered. It is necessary to solve problems such as transmission time when transmitting information on all municipalities by broadcasting signals. However, as a practical matter, it is often sufficient to refer to already-marketed magazines for sightseeing spots, entertainment districts, etc., so if we collect regional information that is more closely related to daily life by segmenting the region, It can be narrowed down to some extent, and that will lead to improved services.

As shown in FIG. 1, the coded information and the additional information obtained from each are multiplexed in the multiplexing unit 20. The multiplexing unit 20 performs, for example, a process of packetizing each of the coded information and multiplexing the coded information for error correction on a transmission frame basis to form a bitstream.

Therefore, the above-mentioned area information is also compressed and multiplexed together with the area code indicating the area. Then, for example, as shown in FIG. 2A, regional information is inserted following the packet header and can be transmitted together with other main information. A region code indicating a corresponding region is attached to the region-specific information as shown in FIG.

FIG. 9B shows an example of commercial information. The information providing destination indicates a commercial provider of a specific industry, and the next specific information is the specific business content or service content of the commercial destination. Etc. are provided as information. It is also possible to provide regional information in a hierarchical manner by attaching subcodes to regional codes.

The multiplexed data is sent to the transmitter 34 shown in FIG.
After being modulated into an ISDB broadcast signal in a transmission form suitable for the transmission means (for example, a broadcasting satellite) in this example, the signal is transmitted to a broadcasting satellite by a transmission antenna (parabolic antenna) 38 via an up converter 36 in this example. .

FIG. 3 shows an example of a receiver 40 according to the present invention for receiving such an ISDB broadcast signal. The satellite wave received by the receiving antenna (parabolic antenna) 42 is down-converted to the 1 GHz band by the down converter 44, and then supplied to the ISDB tuner 46 for channel selection processing. Therefore, the broadcasting signal for ISDB of a specific channel is tuned by the tuning signal SC from the terminal 48.

The selected ISDB broadcast signal is supplied to the signal separating section 50 and separated into the original main information and the additional information. For example, when a specific channel of a standard television signal is selected, it is separated into a standard television signal and additional information (time code etc.) associated with this specific channel. The separated standard television signal is decoded by the decoding unit 52, and the video signal SV (SV
N) and the audio signal SA (SAN) are respectively decoded,
These are supplied to a monitor (CRT or the like) 54 and an image is displayed.

Of the information separated by the signal separation unit 50, the data information regarding the data SD is supplied to another decoding unit 56, and the decoding processing of the regional information is performed. Since the received regional information includes many regions existing in the service area, it is often unnecessary data for a viewer living in a specific region. Therefore, the area code is input in advance, and only the area-specific information in which the area code and the received area code match is decoded, and the decoded data is stored in the memory means 74 in the subsequent stage. As the memory means 74, a semiconductor memory (RAM or the like) or a magneto-optical disk recording / reproducing device can be used.

The area code may be input manually or automatically. When manually input, the area code generated by the control unit 70 is given to the decoding unit 56 via the OR circuit 72. The control unit 70 is controlled based on a command from a commander 80 as an input control device as shown in FIG.

As shown in FIG. 4, for example, the commander 80 includes a power switch 82 and a ten key (1) for channel selection.
0 key) 84, a sequential channel selection switch 86, a volume switch 88, and a display mode selection switch 90 for the monitor 54. Cursor key 9
Reference numeral 2 is a key for moving a cursor (not shown) displayed on the screen.

The following devices can be used to automatically input the area code. In this example, the GPS system is used. As is well known, the GPS system is a system that catches signals from a plurality of satellites and automatically calculates and indicates the position from the longitude and latitude where the GPS device is placed. It is applied to an automatic tracking device that points the cursor to the map displayed on the screen. When this GPS system is used, the position of the receiving device 40 can be accurately detected, so that the area information code obtained at this time can be used as the above-mentioned area code.

Therefore, the GPS device 60 shown in FIG. 3 is constructed as follows. Position signals from a plurality of satellites received by the receiving antenna 62 are supplied to the GPS receiving unit 64,
The position of the GPS device 60 is automatically calculated, and the calculated position information is supplied to the area discriminating means 66 and converted into an area information code assigned to the receiving area. This area information code is stored in the memory means 68 such as a RAM. After the position is detected, only the memory means 68 can be operated, and the rest can be controlled to be in the rest state. This will save electricity.

The area information code is supplied to the decoding unit 56 via the OR circuit 72, and this area information code is used as the area code. Therefore, when the GPS device 60 detects the position where the receiving device 40 is placed, the decoding unit 56 automatically stores only the information regarding the area using the area information code.

Here, since the resolution of the area information code can be obtained with an accuracy of several meters to several tens of meters, it is possible to surely cover the area code assigned in units of municipalities, for example. In order to clarify the correspondence between the area information code and the area code, a table (memory) for automatically converting the area information code into the area code can be prepared. In that case, this table is stored in the memory means 68 described above. It can also be combined.

The regional information accumulated in the memory means 74 is further selected by the selector 76, and the selected specific regional information is displayed on the monitor 54. The reason for selecting information by region is that information that is necessary and not required even in the same information by region allows viewers to freely select this information. The selector 76 is the control unit 7.
It is controlled by the output of 0. When the regional information is hierarchized, for example, a hierarchization code can be directly given to the memory means 74 so that only specific information is read.
In that case, the selector 76 is unnecessary. The selector 78 selects the decoded output from the decoding unit 52 and the regional information, and the image is displayed in the state where either one or both are combined. The selector 78 is controlled by the commander 80.

The regional information selected by the selector 76 can be given to another information terminal. For example, if a fax or the like is connected, this regional information (binary data) can be provided to another user. The means for detecting the position where the receiving device 40 is placed is not limited to the GPS device 60. For example, it is possible to measure the electric field strength of television broadcast waves transmitted from a plurality of regions and detect the location of the Oma.

When the receiving device 40 is mounted on an automobile or the like, the GPS device itself mounted on the automobile can be used as the position discriminating means, which is convenient, and only the information matching the region where the automobile is moving is available. Can be used automatically as a source of entertainment information, etc.

[0042]

INDUSTRIAL APPLICABILITY As described above, the ISDB according to the present invention
The transmitting device and the receiving device transmit the region information in addition to the ISDB broadcast signal by transmitting the region code, and the receiving side gives the region code so that the region information can be automatically selected. It is a thing.

According to this, there is a feature that only information related to the area can be automatically obtained. In obtaining information, if a region code is given, only the information that matches the region code can be automatically stored thereafter. Therefore, it has a feature that necessary information can be obtained more easily than the current captain system. Therefore, the present invention is extremely suitable when applied to an ISDB system for digital broadcasting.

[Brief description of drawings]

FIG. 1 is a system diagram of a main part showing an embodiment of an ISDB transmission device according to the present invention.

FIG. 2 is a diagram showing an example of inserting regional information.

FIG. 3 is a system diagram of essential parts showing an embodiment of an ISDB receiver according to the present invention.

FIG. 4 is a diagram showing an example of a commander.

[Explanation of symbols]

10 ISDB Transmitter 14, 24, 30 Coding Unit 16, 26 Time Code Generating Means (Additional Information Generating Means) 20 Multiplexing Unit 32 Additional Information Generating Means 46 ISDB Tuner 52, 56 Decoding Unit 54 Monitor 60 Position Discriminating Device 64 GPS receiver

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical indication H04N 7/081

Claims (6)

[Claims] 1. An ISDB transmitter for transmitting various kinds of main information such as video, audio, data, etc. together with additional information such as control information, and then transmitting a packetized and multiplexed ISDB broadcast signal, Area-specific information is used as the main information, and an area code is added to the area information so as to be multiplexed with other main information and transmitted. 2. The ISDB transmitting apparatus according to claim 1, wherein the regional information is a map of a receiving place, a weather forecast of the receiving place, a commercial or the like. 3. An ISDB receiving device for receiving a packetized and multiplexed ISDB broadcast signal after digitizing various main information such as video, audio and data together with additional information such as control information. Is provided with an ISDB tuner, a plurality of decoding means for the main information, a memory means for storing a decoded output obtained by decoding the regional information, and a main information monitoring means, respectively, for decoding the regional information. The ISDB receiving apparatus is characterized in that an area code is inputted to the decoding means, area-specific information matching the input area code is selected and stored in the memory means. 4. The ISDB receiver according to claim 3, wherein the area code is manually or automatically generated. 5. The GPS device is used as the automatic generation means of the input area code, and the area information data detected by the GPS apparatus is used as the area code. ISDB receiver. 6. The GPS device comprises a GPS receiving section, area information code discriminating means, and area information code memory means, and the area information code read from the memory means is means for decoding the regional information. 6. The ISDB receiving apparatus according to claim 5, wherein the ISDB receiving apparatus is supplied as a regional code.