JPH1153783A - Tv signal recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically fast forward a commercial part at a reproducing time and to improve convenience by deciding a start point and an end point of a commercial based on simultaneous occurrence of events such as a soundless part in an audio signal, a luminance change in a video signal and a change in a sound multiplex mode, etc., at a video recording time and recording them as absolute addresses of a tape. SOLUTION: A soundless signal detection circuit 2 detects the soundless part in the audio signal from a TV tuner 1 to input it to a commercial decision circuit 4. A video luminance change detection circuit 3 detects the luminance change part of the video signal to input it to the commercial decision circuit 4. The commercial decision circuit 4 regards the time when the soundless part and the luminance change part are detected simultaneously as the event, and when its interval is a multiple of 15 seconds, the circuit 4 decides the interval is the commercial. Then, the absolute addresses from the wind-start of the magnetic tape are stored in a memory 6 by using a signal from an absolute address signal generator 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal recording / reproducing apparatus for fast-forward reproducing a commercial portion of a magnetic tape on which video and audio signals received by a TV tuner are recorded.

[0002]

2. Description of the Related Art As described in Japanese Patent Application Laid-Open No. 2-81344, a conventional recording / reproducing apparatus detects the timing of switching between screens during recording or reproduction, and uses a timer to wait until the next screen is switched. There are some which include a means for measuring time and detecting a screen change for judging whether it is a commercial, a means for measuring a time until the screen is changed, and a means for judging whether or not it is a commercial.

[0003]

In the above prior art, the timing of screen switching is detected, the time until the next screen switching is measured by a timer, and it is determined in real time whether or not the commercial is commercial. Therefore, it is necessary to record the identification signal to be reproduced on the control track by rewinding after recording.

[0004]

To achieve the above object, a television signal recording and reproducing apparatus according to the present invention comprises:
A means for judging the TV signal as a commercial and a memory means for storing the recorded contents of the tape are provided so that the absolute address of the current position can be recorded in the memory means from the beginning of the winding of the magnetic tape when judged as a commercial.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram of a circuit configuration of a main part of a magnetic recording and reproducing apparatus according to an embodiment of the present invention.

[0006] Most commercials are usually broadcast in a multiple of 15 seconds. For example, FIG.
After the program, two 15-second commercials follow, and then a 30-second commercial constitutes one commercial aggregate with a total of three commercials (hereinafter abbreviated as a commercial group). Further, at the boundary between each commercial and the program, there is a change in the luminance component of the video and a non-voice portion.

An embodiment of the present invention will be described with reference to FIG. 1. Reference numeral 1 denotes a TV tuner;
Is a video luminance change detection circuit, 4 is a commercial judgment circuit,
Reference numeral 5 denotes an absolute address signal generator, and reference numeral 6 denotes a memory means.

[0008] The audio signal output from the TV tuner 1 is input to an audio non-signal detection circuit 2 to detect a silent portion, and is input to a commercial determination circuit 4. On the other hand, the video signal output from the TV tuner 1 is input to a video brightness change detection circuit 3 to detect a brightness change portion, and is input to a commercial determination circuit 4. The commercial determination circuit 4 detects a silent portion and a brightness change portion simultaneously. When possible, between commercials or borders with programs (hereinafter abbreviated as events)
Then, the interval of this event is measured by an internal timer, and when the interval is a multiple of 15 seconds, it is determined that the event is a commercial.

Further, as shown in FIG. 2, the head A of the commercial group and the end B of the commercial group
The memory section 6 is used as the absolute address of the current position from the beginning of the winding of the magnetic tape using the signal of the absolute address signal generator 5.
Automatically memorize.

Next, the operation of this embodiment will be described with reference to FIG. FIG. 1 shows an example in which a change in the luminance component of a video and a non-voice portion are detected in order to determine a commercial, and an event is determined when both are detected simultaneously. Is input to the audio multiplex signal detection circuit 7 and the change of the audio multiplex mode is input to the commercial judgment circuit 4. The method of recognizing the start and end points of the commercial using the change of the voice multiplex mode is performed as follows.

When the start point of a commercial is monaural to stereo, the end point of the commercial is stereo to monaural.

If the starting point of the commercial is bilingual to stereo, the ending point of the commercial is stereo to bilingual.

If the starting point of the commercial is bilingual to monaural, the ending point of the commercial is monaural to bilingual.

At this point, it can be regarded as a commercial group.

FIG. 4 shows an embodiment. FIG. 4 (a) assumes a case where a bilingual program has a stereo commercial of 15 seconds + 15 seconds + 30 seconds for a total of 1 minute.
Further, it is assumed that the event of the commercial ending part B part could not be detected (malfunctioned). Usually in this case 15
A commercial of second + 15 seconds can be determined to be a commercial, but a commercial of the second half of 30 seconds is determined to be a program, and FIG.
It malfunctions as shown in FIG.

Therefore, utilizing the change of the voice multiplex mode,
By setting the priority of the commercial determination higher than that of the event, the operation is satisfactorily performed as shown in FIG. As described above, even when the commercial is erroneously recognized, the operation is excellent.

Another embodiment will be described with reference to FIG. In FIG. 5 (a), 15 seconds + 1
It is assumed that there is a stereo commercial of 5 minutes + 30 seconds for a total of 1 minute.
It is assumed that an event has been detected (malfunctioned) during a program 15 seconds after section B. Usually, in this case, 15 seconds +1
A commercial of 5 seconds + 30 seconds can be determined to be a commercial, but a program 15 seconds after the part B is also determined to be a commercial and malfunctions as shown in FIG. 5B.
Therefore, by using the change of the voice multiplexing mode, the priority of commercial discrimination is set higher than that of the event, and FIG.
It operates well as shown in FIG.

In this manner, the program operates well even when the program is erroneously recognized as a commercial.

Even when the change of the audio multiplex mode is used as described above, the head A of the commercial group and the end B of the commercial group are recorded as absolute addresses of the current position from the beginning of the magnetic tape when recording. Next, the reproduction processing automatically stored in the means will be described.
As a basic operation, when the tape reaches the head A of the commercial group during playback, the commercial part is played back in a fast-forward manner, and normal playback is resumed at the end B of the commercial group.

An embodiment of the present invention will be described with reference to FIG. FIG. 6 shows the structure of a program and a commercial in a one-hour program, where the point of interest is the length of the last commercial of the program, usually one program ends and the next program ends. Until the start, a commercial of 2 minutes or more is included. Therefore, a part where the interval between the leading part A of the commercial group stored at the time of recording and the end part B of the commercial group is long is found, and the start of a long commercial is started. Point C is regarded as the end of the program, and
So that you can play it up to

Further, as an application, if the operation is continued so that the recording is continued until a long commercial group regarded as the end of the program at the time of recording the reservation is made, even if the baseball broadcast is extended, the baseball broadcast can be recorded to the end.

Also, a program extended from a baseball broadcast, which has been extended since the baseball broadcast, can be recorded to the end of the program by operating the system so as to continue recording until a long commercial group appears.

Next, an embodiment of the present invention will be described with reference to FIG. 7. Reference numeral 8 denotes a reproducing VTR of the present invention, 9 denotes a memory external output terminal, 10 denotes a recording VTR, and 11 denotes an external control input terminal. .

The memory external output terminal 9 and the external control input terminal 11 are connected, and the information of the memory means is stored in the VTR on the recording side.
In this way, while the end part B of the commercial group is being reproduced from the start A part of the commercial group, the reproduction VTR 11 of the present invention issues a pause instruction to the VTR 10 on the recording side. By operating to transmit, the commercial part can be cut and dubbed.

[0025]

As described above, according to the first aspect of the present invention,
According to this, the start point and end point of the commercial at the time of recording are processed as the absolute address of the tape by the memory means, so that the commercial part can be quickly forwarded accurately.

According to the second aspect of the present invention, the change in the audio multiplex mode, the change in the luminance of the video signal, and the absence of audio in the audio signal are determined as the start point and the end point of the commercial, and from the start point to the end point. By measuring the time, it is possible to more accurately determine that the video portion according to the set conditions is a commercial.

According to the third aspect of the present invention, the start and end of the program can be detected from the contents of the commercial stored in the memory means, so that only the program can be viewed. The program recording after the extended baseball broadcast can be recorded up to the end of the program.

According to the present invention, since the VTR on the recording side can be controlled at the time of dubbing using the information of the commercial stored in the memory means, dubbing can be performed without recording the commercial.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a magnetic recording / reproducing apparatus according to the present invention.

FIG. 2 is an explanatory diagram of a program and a commercial in the present invention.

FIG. 3 is a block diagram illustrating a configuration of a magnetic recording / reproducing apparatus according to the present invention.

FIG. 4 is an explanatory diagram of a bilingual program and a stereo commercial according to the present invention.

FIG. 5 is an explanatory diagram of a monaural program and a stereo commercial according to the present invention.

FIG. 6 is an explanatory diagram of a one-hour program and a commercial in the present invention.

FIG. 7 is a block diagram showing a configuration at the time of dubbing of the magnetic recording / reproducing apparatus according to the present invention.

[Description of Signs] 1 ... TV tuner, 2 ... No sound signal detection circuit, 3 ... Video luminance change detection circuit, 4 ... Commercial judgment circuit, 5 ...
Absolute address signal generator, 6 memory means, 7 multiplexed audio signal detection circuit, 8 VTR for reproduction of the present invention, 9 external memory output terminal, 10 recording VTR with external control input terminal, 11 external Control input terminal.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hisashi Ota 1410 Inada, Hitachinaka-shi, Ibaraki Pref. Hitachi, Ltd. Visual Information Media Division

Claims (4)

[Claims] 1. A means for detecting a change in a luminance signal of a video signal, a means for detecting no sound in an audio signal, and a change point of a scene is determined by detecting a change in the video signal and detecting no sound in the audio signal. A television signal recording / reproducing apparatus, comprising a timer means for measuring a time between switching points, and recording, in a memory means, an absolute address of a current position from the start of winding of a magnetic tape when it is determined that a commercial is detected. 2. The television signal recording / reproducing apparatus according to claim 1, further comprising means for detecting a change in the multiplex mode of the received audio signal as means for judging a commercial. 3. The television signal recording / reproducing apparatus according to claim 1, wherein the start and end of the program are detected from the length of the commercial stored in said memory means. 4. The television signal recording / reproducing apparatus according to claim 1, further comprising means for controlling a VTR on a recording side at the time of dubbing by using commercial information stored in said memory means.