JPS63222586A - Television video signal recording system - Google Patents

Abstract

PURPOSE:To record a desired broadcasting program less comercial and including extra extension on the reception side by inserting a program recognition number information and comercial (CM) start/end prediction information in the data, then transmitting it. CONSTITUTION:A program recognition number data and a CM start/end prediction data preliminarily allocated to each program are converted to packet data, and superimposed on the vertical fly-back period of a TV composite video signal. The packet data is extracted by a vertical synchronizing separator part 12 on the reception side; a program recognition number decoded by a data processing part 14 is compared with a program recognition number prelimarily reserved and stored in a memory 17 by a program recognition number comparator part 15, and a comparison result is inutted to a start/stop signal generation part 18. Also, a CM start/end prediction detection part 16, when detecting a CM start prediction signal and an end prediction signal respectively, outputs a detection signal to the part 18. Accordingly, the recording is continued as long as the program recognition number is not modified, hence the recording is automatically continued even when the broadcast of the program is extended.

Description

Detailed Description of the Invention Technical Field The present invention relates to a television video signal recording system, and more particularly to a recording system for controlling the recording state of commercial composite television video signals including commercial programs in a VTR (video tape recorder). It is.

BACKGROUND ART Conventionally, as a means of controlling and transmitting information between television broadcasting stations, a digital signal in the form of a packet called a TV (television) net cue signal has been superimposed within the vertical retrace interval of a TV video signal. This TV net cue signal includes a station display, a CM (commercial) number, a control signal, etc., and is used only at TV broadcast stations (for example, NAB technical standard TO16-1984).

This TV net cue signal is not used at all by viewers who are general users. Therefore, in such commercial television broadcasting, when a normal broadcast program changes to a commercial program, just looking at the video signals before and after the change, you can tell from where to where the normal program video is, and where the commercial video program is. It is impossible for the user to determine whether the images are superimposed. The same thing is true for individual broadcast programs, and the user cannot determine the program switching timing, which is the end and start of each program, just by looking at the TV video signal.

Therefore, when recording TV video signals using a VTR,
When it is necessary to cut and record each commercial program, the user can manually operate the recording start/stop each time while visually checking the monitor screen to judge the start and end of each commercial program, or use two VTRs to start and stop the recording. It is necessary to edit the dubbing again. In addition, for example, sports programs such as night game broadcasts often have extended time broadcasts, and in such cases, even if you specify the recording time using the absentee recording function or the program reservation recording function, the time extension broadcast program will not work. The downside is that it doesn't record.

Therefore, the present invention has been made to solve the drawbacks of the prior art, and its purpose is to To provide a television video signal recording system capable of accurately recording only desired programs, including time extension parts, excluding CM programs.

11. In the television video recording system according to the present invention, on the transmitting side, program recognition number information assigned to each television program and commercial program are added to a commercial composite television video signal including a commercial program. Commercial start/end notice information indicating the start and end of the commercial is inserted in advance and transmitted, and the receiving side detects the program recognition number information and the commercial start/end notice information, respectively, and uses these detection results to determine the start/end of the commercial. The present invention is characterized in that the recording start and stop states of television video signals are controlled.

Embodiments Below, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing the format of a TV composite video signal in an embodiment of the present invention.
” (horizontal line) This is an example of the format of the period. Program WX assigned in advance to each program
The identification number day, evening 2, and 0M start/end notice data 3 are in the form of packet data, and are superimposed within the vertical retrace section. Note that a start pit 1 is added to the beginning of this packet data.

FIG. 2 is a block diagram of the transmitting side when the packet data shown in FIG. 1 is inserted and superimposed on a TV video signal.

The TV composite video signal is supplied to the inserter 5 via the clamper 4, where the packet data shown in FIG. 1 generated from the data packet generator 6 is superimposed and transmitted as a TV video signal output. The timing generator 7 receives the vertical synchronization signal as input, generates the timing of a predetermined line in the vertical blanking period on which the packet data is to be superimposed, and supplies this timing to the data packet generator 6.

The CMItfl start/end notice signal and program recognition number information are input to the data processing section 9 via the interface section 8, and are coded and converted into data. The CM start notice signal is generated several seconds before the start of CM #1 group (for example, 3 to 5 seconds before), and the CM end notice signal is generated several seconds before the end of each CM program, and the data processing is performed via the interface unit 8. Part 9
It is designed to be input to . Therefore, the CM start/end notice signal will be generated and transmitted in the intermittent mode.

Further, the W identification number signal indicating each program is generated and transmitted in continuous mode during the transmission of the program.

These two signals are encoded by the data processing section 9 and sent to the data packet section 6, where they are converted into packet data so as to be inserted into a predetermined line within the vertical retrace section (see FIG. 1). The inserter 5 inserts and superimposes the packet data on the line-input TV composite video signal, and transmits it as a broadcast signal from the broadcast station.

FIG. 3 is a block diagram of an embodiment of a VTR that receives and records the transmitted TV composite video signal from the transmitting side shown in FIG. 2. In the figure, the TV composite video signal is transmitted to the TV receiver 1.
0, the signal is introduced into the VTR section 11 having a recording function, and is also input into the vertical synchronization signal separation section 12.

In this vertical synchronization separation section 12, the packet data shown in FIG. 1 inserted into the vertical blanking interval is separated and extracted. In the data processing unit 14, the program recognition number data and the 0M start/end notice data are each decoded using the data clock reproduced by the clock reproduction unit 13.

The decoded program recognition number is input to the comparison section 15,
It is compared with the program W1 identification number that has been reserved for recording by the user and stored in the memory 17 in advance.

The result of this comparison is determined by the start/stop signal generator 16.
It becomes human power.

Further, the CM start/end notice signal decoded by the data processing section 14 is input to the CM start/end notice detection section 16, which outputs a detection signal when the CM start/end notice signal is detected, respectively. The signal is generated and supplied to the start/stop signal generating section 18.

This start/stop signal generating section 18 is connected to the VTR section 11.
The VTR unit 11 is configured to enter a recording mode in response to a start instruction, and to enter a recording stop mode in response to a stop instruction.

In such a configuration, the program recognition number comparison unit 15:
The program recognition number separated and extracted from the TV video signal is always compared with the recording reservation program recognition number stored in advance in the memory 17, and when the two match for the first time, a signal is sent to the start/stop signal generation section 18. outputs a start signal generation instruction. Further, when the two start from a matching state and become a mismatching state, a stop signal generation instruction is output.

Furthermore, when the commercial start/end notice detection section 16 detects a commercial start notice signal, it outputs a stop signal generation instruction to the start/stop signal generation section 18, and when it detects a commercial end notice signal, it outputs a start signal generation instruction. Output.

By doing this, the program! ! As long as the 11 number does not change, VTR recording will continue, so even if a program is extended, such as a sports program, recording of the extended program will automatically continue and it will be possible to continue recording the program that is currently being recorded. CM on
If there is a program, the recording of the commercial portion will be automatically stopped.

It goes without saying that the identification number of each program must be announced by the broadcasting station in a newspaper, magazine, or the like before the start of broadcasting.

Effects of the Invention As described above, according to the present invention, it is not necessary to record each unnecessary commercial program, and even if a desired program is scheduled for recording in advance, even if the program is extended, mistakes in recording that part can be eliminated. This has the effect of making it possible to accurately record only truly necessary programs.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a data format used in an embodiment of the present invention, FIG. 2 is a block diagram of a transmitting side used in an embodiment of the present invention, and FIG. 3 is a diagram showing an example of a data format used in an embodiment of the present invention. FIG. 2 is a block diagram of a receiving side. Explanation of codes of main parts 2...Program recognition number data 3...0M start/end notice data 11...
... VTR section 15 ... Program recognition number comparison section 16 ... CM start/end notice detection section 18 ...
...Start/Stop Signal Generator Applicant NEC Corporation

Claims (1)

[Claims] On the transmitting side, program recognition number information assigned to each television program and commercial start/end preview information indicating the start and end of the commercial program are inserted in advance into the commercial composite television video signal including the commercial program. The program recognition number information and the commercial start/end notice information are respectively detected on the receiving side, and the recording start and stop states of the television video signal are controlled based on these detection results. A television video signal recording system characterized by: