JPH0993562A - Isdb transmitter and its receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain automatic recording of only a highlight scene. SOLUTION: The ISDB receiver 40 that receives an ISDB broadcast signal resulting from applying digitizing, packet processing and multiplexing to various main information such as video, audio and data together with additional information such as control information is provided with an ISDB tuner 46, a control signal discrimination means 54 discriminating a recording control signal in the additional information, and an information recording means 58. When specific information is selected, the control signal discrimination means detects a recording control signal and the recording mode and the stop mode of the information recording means are automatically controlled according to the recording control signal. Only a specific scene is selectively and automatically recorded by detecting the recording control signal.

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. In detail, according to the content of the broadcast signal, the recording control signal added to the highlight scene etc. is transmitted as additional information at the same time as the edited broadcast signal, while the receiving side receives this recording control signal. Only when the broadcast signal is recorded, only the highlight scene can be immediately recorded according to the taste of the viewer and replayed.

[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, in the current broadcast program, the replay for a particular highlight scene currently being broadcast is decided by the intention of the broadcasting station side, and the replay speed is reproduced at the time and speed decided by the broadcasting station side. Has been done.

On the other hand, there are many scenes that the viewer wants to replay on purpose, other than the actual problem. In such a case, if the receiving device is equipped with recording / playback means to record the broadcast for a certain period of time and update it sequentially, the scene as intended by the viewer can be adjusted to the viewer's preference. Can be played back at any speed.

However, in order to do so, it is necessary to record all broadcast contents for a certain fixed time as described above. As a result, there are many cases in which scenes that do not need to be replayed are recorded, or scenes that are not worth replaying are recorded. Most of the time, the highlights of the show are similar to whoever sees them. Therefore, if it is possible to attach a recording controller in advance to a plurality of scenes that are considered to be highlight scenes on the sending side and transmit them, only the highlight scenes can be recorded without waste, and even when playing back, only the highlight scenes can be recorded. Since you can see it continuously, there is no waste.

In consideration of the above, the present invention
A recording control signal is added to a specific scene such as a highlight scene for the edited broadcast signal, and this is transmitted as additional information together with the edited broadcast signal, so that the receiving side automatically records only the specific scene. It proposes a transmission / reception device for ISDB which is made possible.

[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. A recording control for selectively recording a specific scene of a broadcast program by the additional information to the main information in an ISDB transmission device which transmits a packetized and multiplexed ISDB broadcast signal after being digitized with information. It is characterized in that the recording control signal is digitized and transmitted simultaneously with the main information.

The ISD according to the present invention described in claim 2
In the B transmitting apparatus, the recording control signal is a binary rectangular wave signal indicating recording start and recording end.

The ISD according to the present invention described in claim 3
In the B transmitter, the recording control signal is a control flag that is output at each of a recording start timing and a recording end timing.

The ISD according to the present invention described in claim 4
In the B transmitter, the recording control signal is characterized by a plurality of control flags which are intermittently output from the recording start timing to the recording end timing.

The ISD according to the present invention described in claim 5
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 control signal discriminating means for discriminating a recording control signal from the additional information, and an information recording means, and when the specific information is selected, the recording is performed by the control signal discriminating means. A control signal is detected, and the recording mode and the stop mode of the information recording means are automatically controlled according to the recording control signal.

The ISD according to the present invention described in claim 6
In the B receiver, when the recording control signal is the control flag, the recording control signal is formed in synchronization with the rising edge of the control flag.

ISD according to the present invention described in claim 7
In the receiving device for B, when the recording control signal is a plurality of control flags that are intermittently supplied, the recording control in which the recording end timing is when the intermittent control flag obtained at each predetermined timing is paused for a predetermined period It is characterized in that a signal is formed.

A section corresponding to the beginning and end of a scene considered to be a highlight scene such as a home run or a nice play, with respect to a broadcast program (mostly a live sports program) being broadcast (actually being edited) by an editing operator. The recording control signal is output to. This is digitized as additional information and multiplexed.

On the receiving side, this additional information is decoded, and when the recording control signal is extracted, this recording control signal is supplied to the recording / reproducing section to automatically control its operation mode. The section in which the recording control signal is rising is controlled to the recording mode, and the highlight scene is recorded. When the recording control signal falls, the recording stop mode is set. Therefore, only the highlight scene is sequentially recorded, and the viewer can reproduce only the highlight scene by reproducing it. As a result, immediacy is ensured and recording waste can be eliminated.

As the recording control signal, a control flag can be considered in addition to a binary rectangular wave. When using the control flag, the control flag is converted into a binary rectangular wave from the control flag on the receiving side. The control flag can be output before and after the section of the highlight scene, or a plurality of control flags can be output at a predetermined timing over the section.

[0021]

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 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 associated therewith, and the coding 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, the recording control signal RCTL corresponding to the broadcast program is supplied from the terminal 17. Recording control signal R
CTL is a signal given to the timing of broadcasting a scene that seems to be a highlight scene, and the most appropriate example is, for example, when it is a sports program such as baseball, a scene of hitting a home run, a scene of fine play, It can be considered a scene where the audience is excited or a scene where the pitch is nice. Then, for example, when a plurality of highlight scenes HSi are broadcast as shown in FIGS. 2A and 2B, the recording control signal RCTL that sets the highlight section to the high level is output in synchronization with the highlight section. The recording control signal RCTL is given by an editing device (not shown) or the like.

The recording control signal RCTL is the control signal processing unit 1
It is supplied to 6 and subjected to digital processing including compression processing. The coded standard television signal (edited television signal) and the additional information are supplied to the multiplexing unit 20 to be 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 control signal processing unit 26 is activated in synchronization with this encoding process to generate the recording control signal RCTL similar to that described above.

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.

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 separating means 50 and separated into the 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) 53 and an image is displayed.

The additional information separated by the signal separating means 50 is further supplied to the control signal discriminating means 54 to search for a packet header that matches the program designation code TCS. This is because it is considered that the recording control signal is not inserted as additional information into all broadcast signals, but is mainly inserted into sports programs such as baseball and soccer.

When the program designation code TCS and the program identification code inserted in the packet header match, the recording control signal code, which is one of the additional information included in the packet header, is separated from the additional information. Is converted into a rectangular wave recording control signal RCTL. The reproduced recording control signal RCTL is recorded and reproduced by the recording / reproducing unit 58.
To the operation mode control signal. When the recording control signal RCTL is supplied, the recording / reproducing unit 58 automatically transits to the recording mode during the high level section, and the highlight scene is automatically recorded. When the recording control signal RCTL becomes low level, the recording stop mode (temporary stop mode) is controlled and the recording ends. Therefore, the recording / reproducing unit 58
Only the highlight scenes HSi are continuously recorded in the sequence according to the broadcast order.

The recording / reproducing unit 58 controls the recording / reproducing control signal R.
It is also controlled by EC / PB. In this case, the control signal REC / PB has a higher priority than the recording control signal RCTL. This is to maximize the will of the viewer.

Video signal S reproduced by the recording / reproducing unit 58
The V'and the audio signal SA 'are supplied to the selector 60, the video signal SV and the audio signal SA from the decoding unit 52 are switched, and then supplied to the monitor 53.

The reproduction signal of the recording / reproducing unit 58 can be viewed (replayed) instead of the broadcast program while the program is in progress, or can be viewed after being combined. Since the viewer has the choice of which highlight scene to watch and the playback speed, the viewer has more freedom. As the recording / reproducing unit 58, a VTR, a data recorder, a magneto-optical disk recording / reproducing device, a semiconductor memory (RAM, etc.) which can be accessed quickly can be used.

The control signal REC / PB, the switching control signal for the selector 60, etc., including the above-mentioned program designation code TCS, are all generated by the control unit 62 having a built-in computer. The controller 62 is controlled by a commander (not shown) for remote control.

Although a rectangular wave signal is used as the recording control signal RCTL in FIG. 2, a control flag as shown in FIGS. 4A and 4B can also be used. In this case, the control flag is generated in synchronization with the start timing and the end timing of the highlight scene. This control flag is supplied to the control signal processing unit 16, 26 via the terminal 17 or 27. Since this control flag is the beginning and end of the highlight scene, when this control flag is detected by the control signal discriminating means 54, the recording control composed of a binary waveform as shown in FIG. 4C from this control flag. It is assumed that the control signal determining means 54 is configured so that the signal RCTL is generated.

When the control flags are generated only at the first and last two positions, the following inconveniences occur. For example, when the power of the receiving device 40 is turned on in the middle of the highlight scene as shown in FIG. 4D, the first highlight scene HS1 cannot be recorded. This is because the control signal discriminating means 54 cannot recognize the first control flag, so that only the recording control signal RCTL as shown in FIG. 4E can be output.

To solve this problem, a plurality of control flags may be sent out at predetermined intervals during the period in which the highlight scene continues (see FIG. 4F). On the other hand, the control signal discrimination means 54
Then, when this control flag is detected, a period slightly longer than the time when the control flag next arrives is set as the control signal detection period D, and when the control flag is continuously input within this detection period D, the control signal detection period D continues. And a high-level output signal (recording control signal) is output.

Therefore, the highlight scene HS of FIG.
, A plurality of control flags as shown in F in the same figure are output according to the length of the scene, and the recording control signal RCTL as shown in G in the same figure is formed from the detected control flags in the discrimination means 54. . In the mode shown in FIG. 7D in which the power is turned on in the middle of the highlight scene, the recording control signal RCTL as shown in FIG. 11H is formed based on the control flag immediately after the power is turned on.

As a result, even when the power is turned on in the middle of the highlight scene, the recording control signal RCTL for the highlight scene HS1 in the latter half is output, and recording can be performed from the latter half of this highlight scene HS1. Like

Even in the highlight scene, there are some scenes that are most excited and some scenes that are not most excited. Therefore, the transmitted recording control signal is hierarchically divided into several levels of importance, and these are viewed by the viewer. Can also be configured to be freely selectable.

Although a digital signal is handled as a broadcast signal in the above, if it is a current analog television signal, the above-mentioned recording control signal can be inserted in a non-video period such as a horizontal or vertical blanking period. Therefore, it is obvious that the idea of the present invention can be applied to the current broadcasting system.

[0045]

INDUSTRIAL APPLICABILITY As described above, the ISDB according to the present invention
The transmitting device and the receiving device transmit a recording control signal related to a specific scene such as a highlight scene as additional information to the ISDB broadcast signal, and the receiving side automatically controls the recording / reproducing unit with this recording control signal. It was done like this.

According to this, the unnecessary portion can be selectively removed and only the truly necessary information (highlight scene) can be automatically recorded based on the recording control signal. Therefore, if the highlight scene is reproduced during the program broadcasting, it is possible to immediately replay only the highlight scene. Therefore, in addition to enabling immediate reproduction, there is a feature that recording waste is eliminated and it is very economical, and the recording capacity of the recording / reproducing unit can be reduced. 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 recording control signal insertion.

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 another example of a recording control signal.

[Explanation of symbols]

10 ISDB Transmitter 14, 24, 30 Encoding Unit 16, 26 Time Code Generating Means (Additional Information Generating Means) 20 Multiplexing Unit 32 Additional Information Generating Means 46 ISDB Tuner 52 Decoding Unit 53 Monitor 54 Control Signal Discriminating Means 58 Recording / playback unit 62 Control unit

Claims (7)

[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, 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 simultaneously with the main information. ISD
B transmitter. 2. The ISDB transmitter according to claim 1, wherein the recording control signal is a binary rectangular wave signal indicating a recording start and a recording end. 3. The ISDB transmitting apparatus according to claim 1, wherein the recording control signal is a control flag which is output at each of a recording start timing and a recording end timing. 4. The ISDB transmitter according to claim 1, wherein the recording control signal is a plurality of control flags which are intermittently output from a recording start timing to a recording end timing. 5. 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. Is provided with an ISDB tuner, a control signal discriminating means for discriminating a recording control signal among the additional information, and an information recording means, and when the specific information is selected, the control signal discriminating means performs the recording control. A signal is detected, and a recording mode and a stop mode of the information recording means are automatically controlled according to the recording control signal. 6. When the recording control signal is a control flag, a recording control signal synchronized with the rising edge of the control flag is formed.
The receiver for ISDB described. 7. When the recording control signal is a plurality of control flags which are intermittently supplied, the recording control is such that the recording end timing is when the intermittent control flag obtained at every predetermined timing is paused for a predetermined period. 6. The ISDB receiver according to claim 5, wherein a signal is formed.