JPH01303979A - Recording and reproducing device for video signal - Google Patents

Abstract

PURPOSE:To record a video signal of two systems on one set of video deck and on one tape at the same time by recording two systems of video signals on a video track alternately in case of video recording and recording an audio signal of two systems on an audio track and a video track using the video audio superimposing recording dividedly. CONSTITUTION:A tuner section 1 of a recording system A receives the 1st channel (Ch1), a tuner section 2 receives the 2nd channel (Ch2) and the video signals of the Ch1, 2 are recorded on a video track 8 on a video tape 3 alternately. In this case, one field is recorded on one track and a control signal C distinguishing the channel (Ch1 or Ch2) of the video signal recorded on the video track 8 is recorded on a control track 7 alternately. The audio signal of the Ch1 is recorded on an audio track 6 and the audio signal of the Ch2 is recorded on the video track 8 by the video audio superimposing system.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a video signal recording and reproducing device, and particularly to a recording and reproducing device that simultaneously records two systems of video signals during recording and selects and reproduces one of them during playback. System [Prior Art] As shown in FIG. One field is recorded on one video track 8, and one frame (one screen) is recorded on two video tracks, and the position where the video signal is recorded on the video tape 23 and the position of the rotating head are controlled. control signal C to 1/3
It is recorded on the control track 7 every 0 seconds. on the other hand,
The audio signal is recorded on an audio track 6 or a video track 8. When recording audio on the video track 6, high-fidelity recording can be performed using a video-audio superimposition recording method.

A playback system B that performs playback extracts the control signal C on the control track 7, and plays back one track at a time while controlling the position of the rotating head and the video track.
It is output to the video output section 22 along with the audio.

[Problem to be solved by the invention]

The above-mentioned recording and reproducing apparatus is uneconomical because, when recording different video signals at the same time, it is necessary to record the signals separately onto two video tapes using two recording apparatuses.

The purpose of the present invention is to solve such problems, to be able to simultaneously record two video signals, and to select one of the two systems during playback to play back the video along with the audio. An object of the present invention is to provide a video signal recording and reproducing device that can perform video signal recording and reproduction.

[Means to solve the problem]

The configuration of the video signal recording and reproducing apparatus of the present invention includes an input section that receives two systems of video signals, a video track for recording the two systems of video signals, an audio track, and a control track that identifies the systems of each of the video signals. and an output display unit that outputs and displays video signals from the video tape, the input unit configured to alternately distribute and record the two systems of video signals on the video track. and recording means for recording an audio signal of the two systems of video signals onto the audio track or onto the video track by audio multiplexing, and the output display section records the audio signal of the two video signals on the video track according to the control signal. It is characterized by having a reproduction means for reproducing the signal and the audio signal.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic block diagram showing a first embodiment of the present invention. This embodiment includes tuners 1 and 2 that receive two channels of video signals, and a video tape 3. , memory section 4. It is composed of a display section 5. First, in recording system A, tuner section 1 receives channel 1 (Chi), tuner section 2 receives channel 2 (Ch2),
And these Chi on video track 8 on videotape 13,
2 video signals are recorded alternately.

In this case, one track records one field, and the control track 7 contains the channel (Chi or Ch2) of the video signal recorded on the video track 8.
A control signal C for distinguishing between the two is recorded alternately. Chi's audio signal is recorded on audio track 6, and C
The audio signal h2 is recorded on the video track 8 using a video/audio superimposition method.

When reproducing Chi in the reproduction system B, only the video signal of the Chi track is written into the memory section 4 by the control signal on the control track 7. Since the video signal written to the memory unit 4 at this time is for one field, one frame (one screen) is created by interpolating the remaining fields using the field correlation of the video. . By outputting this to the display unit 5, the video of Chi can be viewed. Chi's audio can be played from audio track 6.

When reproducing Ch2, one frame is created by writing only the video signal of the Ch2 track into the memory section 4 using the control signal and interpolating the remaining fields using field correlation. do. By outputting this to the display section 5, the video of Ch2 can be viewed, and the audio of Ch2 is output to the video track 8.
It can be played from.

FIG. 2 is a block diagram of a second embodiment of the present invention. In FIG. 0, the tuner section 11 receives one channel (Chi), the tuner section 12 receives two channels (Ch2), Chi, Ch2 on video track 8 above
The video signal of 1 frame is recorded every 2 tracks. A control signal for distinguishing between Chi and Ch2 is recorded on the control track 17. The audio signal of Ch2 is recorded on the video track 18 using the video/audio superimposition method,
The audio signal of Chi is recorded on the audio track 6.

When playing Ch2, the control signal
Only two video signals are written into the memory 4 and interpolated using frame correlation. By outputting this to the display section 5, Ch 2 can be viewed. Also, Ch.
2 audio can be played from the video track 18.

In addition, when reproducing C, h1, only the video signal of the Chl track is transferred to the memory section 4 by the control signal.
By outputting this to the display section 5 using the write frame correlation, the video of Ch.] can be viewed, and the audio of Ch. can be reproduced from the audio track 6.

Furthermore, as shown in FIG. 4, the relative speed between the video tape 113 and the rotary head is increased, and the video signals of Chi and Ch2 are switched and recorded every time one frame is recorded. By increasing the relative speed of the signals and reading every two tracks by controlling the control signal, it is possible to simultaneously record and reproduce two video signals without deteriorating the image quality.

〔Effect of the invention〕

As explained above, the present invention records two video signals alternately on the video track during recording, and
~Distribute and record two audio signals to a rack track and a video track using video/audio superimposition recording, and write a control signal that distinguishes the signal system recorded on the video track to the roll track, and when playing back. By selecting only one system of video signals using a control signal and playing back audio from the audio track or video track according to the selected system, two systems can be played on one video deck at the same time. video signals can be recorded. During playback, one of the video signals recorded at the same time can be selected and viewed without changing the tape.

Furthermore, even if the relative speed between the video tape and the video head is increased, the image quality can be viewed without deterioration. Also, use the correlation of images using memory during playback! By performing signal processing using , it is possible to view the relative speed between the video tape and the video head as before without deteriorating the image quality.

[Brief explanation of the drawing]

1 and 2 are schematic block diagrams showing the first and second embodiments of the present invention, and FIG. 3 is the embodiment of FIG. 2, in which the relative speed between the video tape and the rotary head is increased. FIG. 4 is a schematic block diagram of a conventional video recording and reproducing system. 1.2, 11.12...Tuner part, 3.13°23
...Video tape, 4.14...Memory section 5...
Display section, 6...Audio track, 7.17...
- Control track, 8, 18... Video track, 21... Input section, 22... Output section. target 3 zue 4 fig.

Claims (1)

[Claims] A video tape having an input section for receiving two systems of video signals, a video track for recording the two systems of video signals, an audio track, and a control track for identifying the system of each video signal, and a video signal from this video tape. and an output display unit that outputs and displays the two systems of video signals, and the input unit includes a recording unit that alternately distributes and records the two systems of video signals on the video track, and an output display unit that outputs and displays the audio signals of the two systems of video signals. and recording means for recording a signal on the audio track or on the video track by audio multiplexing, and the output display section has a reproduction means for reproducing the video signal and the audio signal, respectively, according to the control signal. Features: Video signal recording and playback device.