JPH0993285A - Isdb transmitter and its receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce selectively only a designated hierarchical identification level for a hierarchical broadcast program. SOLUTION: An ISDB (integrated service digital broadcasting) receiver 40 receiving an ISDB broadcast signal obtained by digitizing, applying packet processing and multiplexing main information together with additional information is provided with an ISDB tuner 46, decoding sections 52, 56 decoding a program broadcast signal and the additional information, a coincidence judgement section 62 judging the coincidence with the identification code designated by the additional information, a recording and reproducing section 68 recording the program broadcast signal and the additional information corresponding to it based on a coincidence judgement output with a designated identification code, and a control section 60. When a same identification code as the registered identification code is designated, the corresponding broadcast program is recorded by the recording and reproducing section with the additional information. When each of hierarchical levels added to the same identification code is designated, the content of the broadcast program coincident with the hierarchical level is selectively reproduced and displayed on a monitor.

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. Specifically, in addition to the broadcast signal, an identification code for a broadcast program, and a layered identification level for layering the content itself of the same program are transmitted at the same time as additional information. The program content of the same identification code is configured to be saved by specifying the specified identification code, and the same identification level among the program contents saved by specifying the hierarchical identification level together with the identification code The contents of the program can be selectively monitored so that only the program contents desired by the viewer can be reproduced.

[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.

Now, there are some existing broadcast programs that have been edited on the broadcast station side so as to make the program contents hierarchical. For example, in the case of a news program, FIG.
In addition to broadcasting the titles of multiple news topics that should be broadcast within the broadcast time, as shown in the example in Fig. 1, the news program is broadcasted to broadcast an overview of each topic and then move to specific details for the first time. Often configured.

[0008] Commercial broadcast programs often have commercials inserted in them. In addition, for serial programs, intro parts such as titles and performer lists,
Often consists of rough lines, commercials and program broadcasts up to the last time.

As described above, the programs currently being broadcast are more or less, and the program contents are hierarchized to some extent.
On the other hand, viewers do not want to see all the broadcast programs that are layered, and in the case of news programs, some viewers want to watch only the topics, and some viewers want to see the overview and detailed contents. . Furthermore, since the broadcast time zone is not home, it is often impossible to watch live programs.

In order to fulfill such viewer's wishes, the desired broadcast program may be recorded and stored, and the recorded program may be viewed again at a different time. In this case, the viewer himself / herself has to perform an operation such as skip for the unnecessary program contents of the recorded program, which is troublesome and the program contents he / she wants to watch cannot be retrieved immediately. It's inconvenient. It would be very convenient if only specific hierarchical program contents could be automatically selected and monitored from the recorded broadcast programs.

Therefore, the present invention has been made so as to achieve such a problem, and enables a broadcast program designated by a viewer to be selectively stored, and among the stored broadcast programs, The present invention proposes an ISDB transmitter and a receiver thereof capable of selectively reproducing (monitoring) only broadcast contents of a hierarchical identification level designated by a viewer.

[0012]

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, it is layered together with the identification code for each genre of the main information and the broadcast content of the same genre. It is characterized in that the level-added information is coded and multiplexed together with the main information as the additional information and transmitted simultaneously.

ISD according to the present invention described in claim 2
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 includes an ISDB tuner, a decoding unit that decodes the main information, a decoding unit that decodes the additional information, and a match determining unit that determines whether the decoded additional information matches the designated additional information. And a recording / reproducing means for recording the main information and additional information corresponding to the main information on the basis of a match determination output with the designated additional information, and a control section, and the same identification code as the identification code attached to each genre When the code is designated, the corresponding main information is recorded in the recording / reproducing unit together with the additional information.

Further, when each of the hierarchical identification levels assigned to the same identification code is designated, the control section generates control information corresponding to the designation, and records in the recording / reproducing section based on this control information. The main information thus reproduced is selectively reproduced and displayed on a monitor.

[0015]

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 system diagram of an essential 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.

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.

A typical example of the additional information is a time code or the like. In the present invention, in addition to such general additional information, an identification code for identifying a specific broadcast program and the broadcast program When the content of is hierarchical, the hierarchical identification level for indicating the level is used as additional information.

For example, when the broadcast program is news as shown in FIG. 2 and the news is edited as a topics program, even if the news program is a news program as shown in FIG. Like the department that broadcasts and the department that broadcasts its contents in more detail,
Broadcast content is divided into multiple layers. This is also a kind of hierarchy because it is divided into a section that relays sports even in the case of sports programs other than news, and a section other than that (commercial section, etc.).

Therefore, according to the present invention, with respect to these layered broadcast programs, in addition to an identification code ID for identifying the broadcast program, an identification level Li (i =
1 to 4) is used as additional information for the broadcast program. For example, in the case of news topics as shown in FIG. 2, since the broadcast program identification code is IDa, the codes IDaL1, IDaL2, IDaL3, and IDaL representing the hierarchical identification level corresponding to the content of the broadcast program are shown.
4 is used as additional information. G as the identification code
Code etc. can be used. The encoded standard television signal and the above-mentioned additional information are supplied to the multiplexing unit 20 and subjected to multiplexing processing together 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. The additional information generating means 26 is activated in synchronization with this encoding process, and an identification code with the above-described hierarchical identification level is generated as additional information as necessary.

Various data SD such as computer data and facsimile data is supplied to the terminal 28a, which is encoded by the encoding unit 30. At the same time, the additional information generating means 32 is activated to generate the corresponding additional information.
As the additional information, information such as area designation for enlarging / reducing, telephone numbers for inquiries, and fax numbers can be considered.

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. These additional information can be inserted into a part of the header (packet header) of the packetized packet data.

The multiplexed data is ISD in a transmission form suitable for transmission means (for example, a broadcasting satellite) in the transmission unit 34.
After being modulated into the B broadcast signal, the transmitting antenna (parabolic antenna) 3 is passed through the up converter 36 in this example.
At 8, it is transmitted to the broadcasting satellite.

The additional information as described above is transmitted together with the encoded program broadcast. FIG. 2 shows an example of a receiver 40 according to the present invention which receives such an ISDB broadcast signal.

The satellite wave received by the receiving antenna (parabolic antenna) 42 is 1 GHz by the down converter 44.
The signal is down-converted to the z band and then supplied to the ISDB tuner 46 for channel selection processing. Therefore, the channel selection signal SC from the terminal 48 causes the IS of the specific channel
The DB broadcast signal is selected.

The selected ISDB broadcast signal is supplied to the signal separating means 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. A video signal SV (SVN) and an audio signal SA (SAN) are respectively decoded by the decoding unit 52 from the separated standard television signal, and these are supplied to a monitor (CRT or the like) 54 to display a video and also be described later. It is supplied to the recording / reproducing unit 68.

The additional information separated by the signal separating means 50 is supplied to the decoding section 56, and all the additional information is decoded.
The decoded additional information is supplied to the gate means 64, and the identification code for identifying the broadcast program in the additional information is also supplied to the identification code matching determination section 62. A control unit 60 equipped with a microcomputer generates a control signal according to the content of the command by the command from the commander 80.

When the viewer designates a specific broadcast program as one of the control signals by using the identification code, the designated identification code ID is supplied to the coincidence discriminating unit 62 and the decoded identification code is supplied. Is determined. The coincidence determination output is supplied to the gate means 64, only the additional information having the coincident identification code is gated, and the main information (standard television signal or the like) decoded by the decoding section 52 is combined by the adder 66 and then recorded. The program content is supplied to the reproduction unit 68 and the program content is stored (recorded). As the recording / reproducing unit 68, a device having fast access such as a semiconductor memory (RAM or the like) or a magneto-optical disk can be used.

Among the operation modes of the recording / reproducing section 68, in the recording mode, the coincidence discrimination output obtained by the coincidence discrimination section 62 is also used as the recording start signal R.CTL. As a result, when the identification code ID designated by the control unit 60 and the decoded identification code match, the additional information decoded by the match determination output is gated and the recording / reproducing unit 68 is controlled to the recording mode. As a result, the decoded main information is recorded together with the corresponding additional information. Therefore, only the specific broadcast program designated by the user is selectively recorded in the recording / reproducing unit 68 together with the additional information. When the additional information is recorded, it can be recorded separately in a special area separately from the program broadcast. This is to facilitate the search for additional information.

After the main information is recorded, the user's instruction is awaited. As shown in FIG. 2, when the user uses the commander 70 to specify the hierarchical identification level Li together with the identification code IDj for the broadcast program, such as IDaL2 or IDaL3, the control unit 60 causes the specification code IDj to be assigned.
Li is supplied to the recording / reproducing unit 68 as a reproduction control signal PB · CTL.

In the recording / reproducing section 68, this designated code IDj
The recorded identification code ID and the hierarchical identification level are searched from Li, and when the corresponding code exists, only the corresponding recorded information is selectively reproduced. For example, when a code as shown in FIG. 2 is designated, only the broadcast content indicated by "PB" (a symbol indicating a reproduction mode) is selectively reproduced. The selectively reproduced program broadcast is supplied to the monitor 54 via the switch 70 and displayed. This allows the viewer to watch the broadcast contents instructed without disturbing the viewer. The switch 70 is controlled by the control unit 60, and any one of the outputs of the decoding units 52 and 56 and the reproduction output, and in some cases, a plurality can be arbitrarily selected.

[0033]

INDUSTRIAL APPLICABILITY As described above, the ISDB according to the present invention
The transmitting device and the receiving device transmit the ISDB broadcast signal by adding the identification code and the additional information indicating the hierarchical identification level, and the receiving side stores the specific broadcast program by designating the identification code. By specifying the segmentation identification level, only the broadcast programs that match the specified layered identification level among the recorded broadcast programs can be selectively extracted and monitored.

According to this, in addition to being able to automatically save a specific broadcast program only by the identification code, by further specifying the hierarchical identification level, the recorded broadcast program also matches the specified hierarchical identification level. Only broadcast programs can be selectively monitored. As a result, even among the same broadcast programs, only the program contents of the hierarchy desired by the viewer can be viewed, so that the trouble of retrieving useless information can be saved and the recorded contents can be efficiently reproduced. Therefore, the present invention is extremely suitable when applied to an ISDB transmitter and a receiver thereof capable of simultaneously transmitting additional information.

[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 layering of broadcast programs.

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

[Explanation of symbols]

 10 ISDB transmitter 13, 26, 32 Additional information generating means 14, 24, 30 Coding section 20 Multiplexing section 46 ISDB tuner 52, 56 Decoding section 54 Monitor 60 Control section 62 Matching discriminating section 64 Gate means 68 Recording / reproducing Department

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

Claims (2)

[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, Along with the identification code for each genre of the main information, the identification level when the broadcast content of the same genre is hierarchized is added and encoded together with the main information and simultaneously transmitted. An ISDB transmission device characterized by: 2. An ISDB receiver for receiving ISDB broadcast signals, which are obtained by digitizing various main information such as video, audio and data together with additional information such as control information, and then packetizing and multiplexing the same. Includes an ISDB tuner, a decoding means for decoding the main information, a decoding means for the additional information, and a match determining means for determining the match between the decoded additional information and the specified additional information. An identification code which is the same as the identification code assigned to each genre, which is composed of the main information and the recording / reproducing means for recording the additional information corresponding to the main information on the basis of the match discrimination output with the designated additional information. Is specified, the corresponding main information is recorded in the recording / reproducing section together with the additional information, and the identification code and the identification code are added. When each of the specified hierarchical identification levels is designated, the control section generates control information corresponding to the designation, and based on this control information, the main information recorded in the recording / reproducing section is selectively reproduced. A receiver for ISDB, characterized in that it is adapted to be displayed on a monitor.