JPH09135391A - Isdb transmitter and receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce the highlight scenes almost in real time even in a live program. SOLUTION: This device digitizes, packeting and then multiplexing the additional information as well as the main information. A receiver includes an ISDB tuner 46, a main information decoding part 52, an additional information decoding part 56, a section information detection part 58 which shows the sections of highlight scenes which are added to the main information as the additional information, and the 1st and 2nd memory means which store the main information. The main information is always stored in the 1st storage means, and the highlight scene information related to the section information is stored in the 2nd storage means out of the main information stored in the 1st storage means when the section information is detected. Then the information on the highlight scenes stored in the 2nd storage means can be optionally read and displayed regardless of the 1st storage means through the control of the 2nd storage means.

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, when there is a highlight scene in a live broadcast program or a broadcast program that conforms to it, section information indicating the section of the highlight scene is transmitted as additional information at the same time as the live broadcast program after the highlight scene is sent. On the receiving side, the live broadcast program is always stored, and when the section information indicating the section of the highlight scene is detected, only the highlight scene of the stored corresponding broadcast program is re-stored and re-stored. The contents of the stored broadcast program can be monitored as a highlight scene at any time even during the live broadcast program.

[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 realized.

[0007] In order to enjoy interactive broadcasting, ISDB needs to be interactive so that the receiving side can interact.
It is necessary that the broadcast signal for use is structured. Since the integrated ISDB broadcast signal can perform multi-channel multiplex transmission / reception, the transmission data structure can be handled flexibly. Therefore, for a program that can be edited in a sufficient amount of time in the editing stage before transmission, the transmission data can be structured in advance in a form suitable for interactive operation.

However, with respect to a live broadcast program or a broadcast program close to a live broadcast program, it is not possible to grasp what happens next, and therefore transmission data cannot be structured in advance and transmitted. In addition, even if the data can be structured and transmitted in a form suitable for interactive operation, the same data may sometimes be transmitted repeatedly, and the efficiency of data transmission cannot be improved. There is also.

[0009] For example, a baseball relay will be illustrated as a live broadcast program. For example, consider an interactive broadcast configuration in which, when player A enters the bat, the recipient may wish to replay any of the player's previous bats in the same match.

Since the integrated broadcast signal can have a flexible data format, it is inconceivable to retransmit all image data (especially highlight scenes) of past bats every time player A enters the bats. There is no. In order to do so, the same image data showing a highlight scene is repeatedly transmitted many times, which is very inefficient from the viewpoint of improving the efficiency of transmission data.

On the other hand, since the image data of the past turn at bat is already transmitted, if it is stored in the receiving side storage device, it can be read out at any time, which is inefficient data. You can improve the transmission.

However, in order to do so, it is necessary to prepare a considerably large capacity of the data storage device on the receiving side. It is natural to be limited by the capacity problem, which is not a good solution. If the broadcast signal can be selectively accumulated, such a problem can be solved, but in a live broadcast program, it is not possible to determine which scene is a useful scene at the time of transmission, so that real-time selective accumulation processing is impossible.

Therefore, the present invention solves such a problem by structuring a live broadcast program or a broadcast program corresponding thereto to enable selective accumulation processing close to real time, and at the same time, highlight scenes thereof. It can be read and monitored.

[0014]

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 transmission device adapted to transmit a packetized and multiplexed ISDB broadcast signal after digitized together with information, section information indicating a section of a highlight scene with respect to the main information is digitally added together with the main information as additional information. It is characterized in that it is multiplexed and multiplexed and transmitted together with the main information.

The ISD according to the present invention described in claim 2
In the B transmitter, the main information is a live broadcast program.

In the ISDB transmitter according to the third aspect of the present invention, the section information is a time code attached to the main information, or this time code and a keyword such as a character in a highlight scene.

In the ISDB receiver according to claim 4,
ISD that receives various types of main information such as video, audio, and data, along with additional information such as control information, and then receives a packetized and multiplexed ISDB broadcast signal
In the receiving device for B, the receiving device has an ISDB tuner, a decoding unit for the main information, a decoding unit for the additional information, and section information indicating a section of a highlight scene added as additional information of the main information. Detection means of
A first and a second storage means for the main information, the main information is always stored in the first storage means, and when the section information is detected, the first storage means Of the main information recorded in the above, the information on the highlight scene related to the section information is stored in the second storage means, and the information on the highlight scene stored in the second storage means is arbitrarily read. It is characterized in that it can be displayed.

In the ISDB receiver according to claim 5, the first storage means comprises a pair of memory means,
When the section information indicating the section of the highlight scene is detected, the writing and reading states in the pair of memory means are inverted in synchronization with the detection.

In the ISDB receiver according to the sixth aspect, when the information on the highlight scene is read from the second storage means, the information indicating the highlight scene can be monitored instead of the main information. The additional information to the main information is a recording control signal for selectively recording a specific scene of a broadcast program, and the recording control signal is digitized and transmitted at the same time as the main information. It is characterized by having done.

In a live broadcast program, section information indicating a highlight scene is transmitted as additional information. This additional information is transmitted after the highlight scene broadcast in the live broadcast program. On the receiving side, all the scenes of the transmitted live broadcast program are once stored in the storage device. After sending each scene,
Only when the additional information indicating whether or not the scene is useful is detected, the highlight scene that is considered to be useful is re-accumulated, and the scene determined to be unnecessary is not re-accumulated. Since live broadcast programs are continuously input to the storage device, all scene information (including not only scene information determined to be unnecessary but also scene information determined to be useful) is sequentially erased.

Thus, even if a storage device having a finite capacity is used and it is difficult to determine whether or not the scene is useful at the time of transmission, such as a live broadcast program, the structure of transmission data The highlight scene can be monitored at almost any time in almost real time.

[0022]

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. For standard television signals and high definition signals, time code and other control signals 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 compresses the signal. 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 the present invention, a recording control signal suitable for a broadcast program is supplied from the terminal 17. In the present invention, section information indicating a section of a highlight scene is given as a recording control signal when a broadcast program is a live broadcast program or a live broadcast program corresponding thereto, in particular. For example, assume that a plurality of highlight scenes SHi occur in a live broadcast program Sa as shown in FIG. 2A. While watching the live broadcast program Sa, the editor uses the editing broadcast program Sb (B in the figure) delayed by a predetermined time Δt to give section information indicating a section of a highlight scene (recording control signal). It is given to the terminal 17 as CTL.

The instruction signal CTL is generated by the editing device, and in addition to the section information (rectangular wave signal) indicating only the section of the highlight scene, the main characters and objects of the highlight scene, etc. Character names and object names of, as well as their keywords can be included.

As a most suitable example of the highlight scene, in the case of a sports program such as baseball, a scene of hitting a home run, a scene of fine play, a scene in which the audience is excited or a scene in which a nice pitching is performed can be considered. Since such a highlight scene appears momentarily, in order to reproduce all of the highlight scene, as described above, the live broadcast program S
It can be easily understood that it is necessary to use the editing broadcast program Sb in which a is delayed by a predetermined time. It is sufficient for the delay time Δt to be several seconds to ten and several seconds.

The instruction signal CTL is supplied to the highlight information generating section 16 as additional information and subjected to digital encoding processing including compression processing. What is highlight information?
It refers to various types of section information indicating sections of the highlight scene. The coded standard television signal and the additional information are supplied to the multiplexing unit 20 and multiplexed with other information.

The video signal SVH of the high-definition signal is supplied to the terminal 22a, and the audio signal SAH accompanying it is supplied to the terminal 22b, and the coding unit 24 performs the same coding process as described above. In this example as the additional information generating means, the highlight information generating unit 26 is activated in synchronization with this encoding process, and highlight information similar to that described above is generated.

Various data SD such as computer data and facsimile data is supplied to the terminal 28a, and this 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, 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.

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.

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 separation unit 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.

The additional information separated by the signal separating unit 50 is supplied to the decoding unit 56, the additional information is decoded, and the decoded additional information is supplied to the highlight information detecting unit 58. The highlight information detector 58 detects highlight information, which is section information indicating a section of the highlight scene shown in FIG. Whether or not it is highlight information can be determined by the presence or absence of the identification flag inserted in the packet header.

The detected highlight information is supplied to the control unit 60. A microcomputer is built in the control unit 60, and processing such as accumulation of all scenes of a live broadcast program and reaccumulation of only highlight scenes is performed based on highlight information. Therefore, the following configuration is further added.

In this example, the main information before being decoded is supplied to the storage device 61. The storage device 61 is composed of three memory means 62, 64, 70, and a pair of memory means (first and second memory means) 62, 64 configured as a first storage means are provided for storing received broadcast programs. It is used to store all the scenes, and switches 66 and 68 are provided in the data input stage and the data output stage, respectively, so that writing and reading can be switched alternately. Therefore, the switches 66 and 68 are interlocked with each other.

The memory means 70 in the latter stage is a memory for re-accumulation (second accumulation means), in which only the highlight scene designated by the transmitting side is re-accumulated, and a command from the control section 60 is issued. Based on this, the changeover switch 72 operates to display on the monitor 54 instead of the output video signal of the decoding unit 52 or in a state of being combined with the output video signal. The memory means 62, 64, 70 are all semiconductor memories (R
A fast-access storage means such as an AM or a magneto-optical disk can be used.

The control unit 60 composed of a microcomputer generates a control signal for changing the display mode and selecting the monitor contents by remote control from the commander 80. As shown in FIG. 4, the commander 80 includes a power switch 82 and a ten-key (10-key) 8 for channel selection.
4, a sequential channel selection switch 86, a volume switch 88, and a display mode selection switch 90 for the monitor 54. A cursor key 92 is a key for moving a cursor K (not shown) displayed on the screen, and is used for designating a divided area and the like.

The above-described storage device 61 and the like perform the following processing under the intervention of the control unit 60, but the processing example is merely an example and is not limited to the presented example. This will be described with reference to FIG.

When the highlight scene SHi is determined by using the editing broadcast program Sb delayed by the predetermined time as described above, the corresponding instruction signal CTL (A, B and C in the figure) is generated. To be done. The instruction signal CTL is the time code TC of the scene, the main characters in the scene, keywords, and the like. The example of FIG. 2 illustrates the time code TC. When using the time code TC, the start and end time codes of the scene (if the scene SH1 is T
Ca and TCb) are used, and this is encoded as highlight information (additional information) (D in the figure).

When the highlight information is detected by the highlight information detecting section 58 provided in the receiving device 40, it is supplied to the control section 60 and converted into a binary signal as shown in FIG. 2E. This binary signal is used as a memory switching signal for the switches 66 and 68. In this example, the high level section is in the switching state shown by the solid line in FIG.
The low level section is in the switching state shown by the broken line.

Here, when the switch 66 on the input side is switched to the contact a side (memory means 62 side), the switch 68 on the output side is complemented so as to be switched to the contact b side (memory means 64 side). Switch control.

As a result, when one is in the writing state, the other can be controlled to be in the reading state (FIG. 2).
F, G). As a result, when the highlight scene SH1 is stored in the memory means 62, the next highlight scene S1
H2 will be stored in another memory means 64. Further, the control unit 60 uses the highlight signal to determine the timing of hitting the end of each scene (time code TCb, TC
In d), the memory means for which writing has been completed is controlled to the read mode.

For example, in the case of the relationships shown in FIGS. 2F and G, the memory means 62 is controlled to the read state at the timing when the time code TCb in the delayed editing broadcast program Sb is obtained, and the same time code TCa and TCb. The scene (highlight scene) SH1 in the section is read out. In synchronization with this, the third memory means 70 is controlled to be in the write state, so that the read video information of the highlight scene SH1 is rewritten in the third memory means 70 (FIG. 2H).

The same applies to the memory means 64. The highlight scene SH2 is read from the memory means 64 in synchronization with the time code TCd and the third memory means 70 is read.
Are rewritten (FIG. 2H). Therefore, when the display control signal (FIG. 2I) is output from the controller 60 based on the command from the commander 80 immediately after the rewriting is completed, the operation modes of the first and second memory means 62 and 64 are irrelevant. , The information stored immediately before the third memory means 70 is controlled to the read state (highlight scene SH
1) is lead. At the same time, in this example, the switch 72 is switched to the third memory means 70 side, so that the highlight scene SHi is displayed on the monitor 54 in the middle of the live broadcast program as shown in FIG. 2J.

Therefore, even in a real-time broadcast program such as a live broadcast program, the highlight scene SHi displayed immediately before can be reproduced immediately after that. The reproduction timing and the number of times of reproduction are not limited. The read / write mode and the rewrite mode are similar for the highlight scene SH2, and it can be easily understood that the highlight scene can be reproduced at the timing when the display control signal is obtained. Characters and keywords of the highlight scene can be input as the display control signal, and by using these display control signals, the specified highlight scene can be monitored at any timing without being caught by the rewriting timing.

When the memory means 62 and 64 are full, new information is overwritten in order from old information.
Its storage capacity does not need to be very large. With respect to the memory means 70, old highlight scenes can be erased as required by a command from the control unit 60, so that it is not necessary to prepare a large storage capacity.

In FIG. 3, the main information obtained immediately before the decoding unit 52 is supplied to the first storage means (62, 64), but the output of the decoding unit 52 can also be used. In this case, an encoder for data compression may be provided at the stage before the changeover switch 66, and a decoder for data decompression may be provided at the stage after the third memory means 70.

[0050]

INDUSTRIAL APPLICABILITY As described above, the ISDB according to the present invention
The transmitting device and the receiving device add highlight information to the highlight scene of the ISDB broadcast signal, etc. while following it, and send this as additional information, and the receiving side specifies a specific highlight information based on this highlight information. The light scenes are re-accumulated.

According to this, the highlight information can be post-delayed in parallel with the program broadcasting with a slight delay, so that the highlight scene can be reproduced in almost real time. Of course, since only the highlight information is transmitted as the additional information, the broadcast signal can be structured without increasing the amount of transmission information. Therefore, the present invention is an ISD for digital broadcasting.
It is a B system, and is particularly suitable when applied to a live broadcast program transmission.

[Brief description of the 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 highlight scene determination, storage, and monitoring.

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 transmission device 14, 24, 30 Coding unit 20 Multiplexing unit 16, 26, 32 Additional information generating means 46 ISDB tuner 52, 56 Decoding unit 54 Monitor 58 Highlight information detecting unit 60 Control unit 61 Storage device 62 , 64, 70 memory means

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, An ISDB transmitter, wherein section information indicating a section of a highlight scene with respect to the main information is digitized and multiplexed together with the main information as additional information, and is transmitted together with the main information. 2. The ISDB transmission apparatus according to claim 1, wherein the main information is a live broadcast program. 3. The ISDB transmitting apparatus according to claim 1, wherein the section information is a time code attached to the main information or a keyword such as the time code and a character in a highlight scene. . 4. 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 packetized and multiplexed. The ISDB tuner, the main information decoding unit, the additional information decoding unit, the section information detecting unit indicating the section of the highlight scene added as the additional information of the main information, and the main information A first and a second storage means, and the main information is always stored in the first storage means, and when the section information is detected, it is recorded in the first storage means. Of the main information, highlight scene information related to the section information is stored in the second storage means, and stored in the second storage means. ISDB receiving apparatus being characterized in that the information relating to Lee Scene to be displayed by arbitrarily read. 5. The first storage means comprises a pair of memory means, and when section information indicating a section of a highlight scene is detected, writing in the pair of memory means is synchronized with the detection. 5. The IS according to claim 4, wherein the read state is inverted.
DB receiver. 6. When reading information related to a highlight scene from the second storage means, it is possible to monitor information indicating the highlight scene instead of the main information. ISDB described
Receiver.