JPH0411362A - Digital recording and reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a digital recording and reproducing apparatus that digitizes input signals and records and reproduces them.

BACKGROUND ART FIG. 5 shows an example of a digital VTR as a conventionally known digital recording and reproducing device. In FIG. 5, 1 is an input terminal for a video signal, 2 is a video signal processing circuit, and 3 is an audio signal input terminal. 4 is an audio signal processing circuit, 5 is a multiplexer for multiplexing video signals and audio signals, 6 is an input terminal of
7 is a recording processing circuit, 7 is a recording amplifier, and 8 is a recording head. Here, the video signal is subjected to interleaving, error correction code addition, etc. in the video signal processing circuit 2, and the audio signal is also subjected to similar processing in the audio signal processing circuit 4, and then multiplexed in the multiplexer 5. After the recording processing circuit 6 performs processing necessary for recording such as modulation,
Through the recording amplifier 7, the recording head 8 records the video signal on a video signal track (video track) and the audio signal on an audio signal track (audio track).

The actual recording pattern on the tape is recorded in the form shown in FIG.

Problems to be Solved by the Invention However, the digital recording and reproducing apparatus described above has the following problems.

When recording video and audio signals in a digital recording/playback device, it has the function of recording continuous video, that is, a video signal and an audio signal, but when a still image that is completed in one shot is input, It does not have a function to efficiently record such still image signals.

SUMMARY OF THE INVENTION In view of the problems of the prior art, it is an object of the present invention to provide a digital recording and reproducing apparatus that can record still images even when not only moving images but also still images are input.

Means for Solving the Problems In order to solve the above problems, the first invention of the present application provides a video signal recording means for recording a video signal on a first track, and an audio signal recording means for recording an audio signal on a second track. means and
A digital recording device comprising still image signal recording means for recording a still image signal on the second track, and selection means for selectively employing the audio signal recording means and the still image signal recording means. It is a playback device.

A second invention includes a video signal recording means for recording a video signal on a first track, an audio signal recording means for recording an audio signal on a second track, and a still image signal on the first track. still image signal recording means, the moving image signal recording means and the audio signal recording means simultaneously record a moving image signal and an audio signal, and the audio signal recording means and the still image signal recording means record an audio signal and a still image signal. This is a digital recording and reproducing device characterized by recording an image signal and an image signal at the same time.

A third invention provides a video signal recording means for recording a video signal on a first track, a first audio signal recording means for recording an audio signal on the first track, and a video signal recording means for recording an audio signal on a second track. It has a second audio signal recording means for recording, and a still image signal recording means for recording a still image signal on the second track, and when recording a moving image signal, the moving image signal recording means and the second audio signal recording means are provided. When recording a still image signal, the still image recording means and the first audio signal recording means are employed.
1. A digital recording and reproducing apparatus characterized in that it has a selection means that employs an audio signal recording means.

Effects According to the first aspect of the invention, with the above-described configuration, when recording a moving image signal, an audio signal is recorded on an audio track, and when recording a still image signal, a still image signal is recorded on the audio track.

A second invention has the above-described configuration to record an audio signal on an audio track in both cases of recording a moving image signal and a still image signal.A third invention has the above-described configuration to record an audio signal on an audio track. When recording, a video signal is recorded on a video track, and an audio signal is recorded on an audio track. Furthermore, when recording a still image signal, an audio signal is recorded on a video track, and a still image signal is recorded on the audio track.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing an embodiment of a digital recording/reproducing apparatus according to the first invention. In FIG. 1, 100 is a video signal input terminal, 101 is a switch for switching processing when the input signal is a moving image or a still image, 102 is a moving image signal processing circuit, 103 is a still image signal processing circuit, and 104
1 is an audio signal input terminal, 105 is an audio signal processing circuit, and 1
06 is a still image signal processing circuit 103 and an audio signal processing circuit 1
107 is a multiplexer for multiplexing the output of the moving image processing circuit 102 and the output of the switch 106, 108 is a recording processing circuit, 109 is a recording amplifier, and 110 is a recording head. The operation of this embodiment will be explained below.

Although a digitized video signal is input from the input terminal 100, the operation when a moving image signal is input will be described first. In this case, the switch 101 is fixed to the M side, so that the moving image processing circuit 102 processes the input signal. At the same time, an audio signal is input from the input terminal 104 and processed by the audio signal processing circuit 105. Next, the switch 106 is fixed to the O side, and the multiplexer 1
07, the video signal and audio signal that have been subjected to the above processing are multiplexed. After the multiplexed signal is subjected to the necessary processing for recording in the recording processing circuit 10B, the video signal is recorded on the video track and the audio signal is recorded on the audio track in the recording RAD 110 via the recording amplifier 109. .

Next, the operation when recording a still image signal will be explained. In this case, the two switches 101 and 106 described above are each fixed to the S side. That is, the input still image signal is processed by the still image processing circuit 103,
Multiplexer 107, recording processing circuit 108, recording amplifier 10
9 and is recorded on the audio track by the recording head 110. Here, by writing a still image to the audio track, the information of the audio signal that has already been written will be erased, but since audio signals are usually recorded in the form of multiple channels such as 2 channels or 4 channels, For example, in the case of 4-channel recording, by recording still image signals on two channels on one side, the information of the audio signals recorded on the other two channels is saved as is, and when playing back a video, two channels are recorded at the same time. You can also play the audio. Furthermore, although the signal is multiplexed with the output of the video processing circuit 102 in the multiplexer 107, since no video signal is input, nothing is recorded on the video track.

As explained above, according to this embodiment, when recording a still image, the still image is recorded on the audio track without recording the audio signal, so that the moving image, audio, and still image can be recorded on the same recording medium. Can be recorded.

FIG. 2 is a diagram showing an embodiment of a digital recording/reproducing apparatus according to the second invention. In FIG. 2, 200 is a switch for selecting the output of the video signal processing circuit 102 and the still image signal processing circuit 103, 201 is a memory for storing the input audio signal, and 202 is the input audio signal. A switch for selecting the output of the memory 200, 203
is a multiplexer for multiplexing the outputs of the switch 200 and the audio signal processing circuit 105. The operation of this embodiment will be explained below.

When recording a moving image, the switches 200 and 202 are each fixed to the M side, and the moving image signal is recorded to the video track and the audio signal to the audio track at the same time, as in the past.
Next, when recording a still image, switch 200.2
02 are each fixed to the S side.

First, the audio signal is once stored in the memory 201, and read out from the memory 201 at the same time as the still image signal is input. Thereafter, the still image is processed by the still image signal processing circuit 103, the audio signal is processed by the audio signal processing circuit 105, the still image signal and the audio signal are multiplexed by the multiplexer 203, and the still image signal is transferred to the video track. Each audio signal is recorded on an audio track.

As explained above, according to this embodiment, when recording a still image, it is possible to simultaneously record an audio signal.

Note that in this embodiment, a still image and the corresponding audio signal are simultaneously recorded, but in order to achieve a sufficient recording time for the audio signal, reducing the amount of information by compression encoding is also an effective method. , for example, as shown in FIG. 3, can be easily realized by disposing an encoder 300 in front of the memory 201 and performing encoding processing.

FIG. 4 is a diagram showing an embodiment of a digital recording/reproducing apparatus according to the third invention. In FIG. 4, 300.
301 is a switch for selecting the output of the switch 200 and the audio signal processing circuit 105; 302 is a switch 300;
This is a multiplexer for multiplexing the outputs of the switch 301 and the switch 301. Here, the output of the switch 300 outputs a signal to be recorded on a video track, and the switch 301 outputs a signal to be recorded on an audio track. The operation of this embodiment will be explained below.

When recording a moving image, the switches 300 and 301 are fixed to the M side, and the switch 300 receives the video signal processed by the video signal processing circuit 102, and the switch 301 records the audio processed by the audio signal processing circuit 105. Output each signal. Therefore, as in the conventional case, when recording a still image on the 0th order, which simultaneously records a video signal on a video track and an audio signal on an audio track, the switch 300.
301 are each fixed on the S side. That is, the audio signal is input to the multiplexer 302 by the switch 300, and the still image signal is input to the multiplexer 302 by the switch 301. Therefore, in this case, the audio signal is 1 on the video track.
The still image signal will be recorded on the audio track. Furthermore, for audio signals, -degree memory 201
is stored in memory 2, and the still image signal is stored in memory 2 at the same time as it is input.
It is read from 01.

As explained above, according to this embodiment, when recording a still image, it is possible to simultaneously record an audio signal. Moreover, since the video track can record more information than the audio track, a sufficiently long audio signal can be recorded for one still image.

Note that in this embodiment, as in the embodiment explained in FIG. This can be easily realized using a method similar to that shown in FIG.

Also, the second. In the embodiment of the third invention, the audio signal is stored in the memory and recorded at the same time as the still image signal, but it is also possible to record the still image in advance and record the audio later, or vice versa. Needless to say, this can be easily realized by adding a few circuits.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, according to the present invention, a still image signal can be recorded in a digital recording/reproducing device having the function of recording a moving image signal and an audio signal, and its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a digital recording/reproducing apparatus in an embodiment of the first invention, FIG. 2 is a block diagram of a digital recording/reproducing apparatus in an embodiment of the second invention, and FIG. 3 is a block diagram of a digital recording/reproducing apparatus in an embodiment of the second invention. A block diagram of an audio signal encoding portion of a digital recording and reproducing apparatus in one embodiment, FIG. 4 is a block diagram of a digital recording and reproducing apparatus in an embodiment of the third invention, and FIG. 5 is a block diagram of a conventional digital recording and reproducing apparatus. FIG. 6 is an explanatory diagram showing the recording pattern on the tape. 101, 200.202.300.301...
・Switch, 102... Video signal processing circuit,
103...Still image signal processing circuit, 105...
...Audio signal processing circuit. 1006 Kadoma, Oaza, Shinichi 1006 Kadoma, Oaza, Makoto Matsushita Electric Industrial Co., Ltd. Inside Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] (1) A video signal recording means for recording a video signal on a first track, an audio signal recording means for recording an audio signal on a second track, and a still image signal for recording a still image signal on the second track. 1. A digital recording and reproducing apparatus comprising: a recording means; and a selection means for selectively employing the audio signal recording means and the still image signal recording means. (2) A video signal recording means for recording a video signal on a first track, an audio signal recording means for recording an audio signal on a second track, and a still image signal for recording a still image signal on the first track. recording means, the video signal recording means and the audio signal recording means simultaneously record a video signal and an audio signal, and the audio signal recording means and the still image signal recording means record an audio signal and a still image signal. A digital recording/playback device characterized by simultaneously recording. (3) a moving picture signal recording means for recording a moving picture signal on a first track; a first audio signal recording means for recording an audio signal on the first track; and a first audio signal recording means for recording an audio signal on a second track. 2 audio signal recording means and a still image signal recording means for recording a still image signal on the second track, and when recording a moving image signal, the moving image signal recording means and the second audio signal are recorded. 1. A digital recording and reproducing apparatus, characterized in that it employs a recording means and has a selection means that employs the still image recording means and the first audio signal recording means when recording a still image signal.