JPH05217281A - Video and voice recording and reproducing device - Google Patents

Abstract

PURPOSE:To provide a video and voice recording and reproducing device which is capable of reproducing recorded voices in a normal manner while reproducing the video at a high speed. CONSTITUTION:During a recording of voice signals, the device is provided with a voice transforming device 115 which transforms voice signals so that during a high speed mode reproduction, the voice signals are reproduced in the same condition in which the signals are reproduced in the speed of a normal mode and a voice signal selecting device 121 which selects transformed voices or nontransformed voices in accordance with the reproduction speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video / audio recorder / recorder for video tape recorders (hereinafter referred to as VTRs), compact discs, optical discs and the like.

[0002]

2. Description of the Related Art In a VTR, which is a typical example of a conventional video / audio recording / reproducing apparatus, a video signal source 21 as shown in FIG.
1 and the video signal and the audio signal obtained from the audio signal source 212 are guided to the recording magnetic head 208 via the audio signal line 210 and the video signal line 209.

On the other hand, a signal for controlling the rotation speed of the motor is generated by the motor drive control device 201, and the motor 203 is driven via the control signal line 202. The rotation of the motor 203 winds the recording magnetic tape 207 wound around the primary roller 206 around the secondary roller 205 via the drive transmission belt 204.

Similarly, during reproduction, the motor drive controller 2
The motor rotation speed control signal created by 01 is the control signal line 2
The motor 203 is driven via 02, and the motor 20
The rotation of No. 3 rotates the secondary roller 205 via the drive transmission belt 204, and the recorded magnetic tape 207 wound around the primary roller 206 becomes the secondary roller 205.
Roll it up. At this time, the reproducing magnetic head 213 extracts the video and audio signals recorded on the recorded magnetic tape 207, which are the audio signal line 214 and the video signal line 2.
A voice reproducing device 216, for example, a speaker,
It is input to the video reproduction device 217, for example, the CTR of a television, and the video and audio are reproduced here.

[0005]

In such a conventional video / audio recording / reproducing apparatus, the video signal and the audio signal to be recorded have a single speed, that is, the speed at which the signal is obtained by the video and audio signal sources. However, there is no relation between the rotation speed of the motor and the recording speed of the video and audio, and when playing back in normal mode,
Video and audio are played back at the same speed as before they were first recorded, and when played in high-speed mode, both video and audio are played back at high speed, and video can be viewed at high speed, but audio is difficult to hear. Had problems.

The present invention solves such a problem, and an object of the present invention is to provide a video / audio recording / reproducing apparatus in which audio can be normally heard even when a video signal is reproduced in a high speed mode.

[0007]

In order to achieve the above object, the present invention provides a first recording method for recording an audio signal on a recording medium so that when the audio signal is reproduced at a normal speed, the original sound is reproduced. A means for recording an audio signal and two signals of a second audio signal converted so that when reproduced at a high speed, the original audio is reproduced at the same speed as at the time of recording, and a means for recording at the time of reproduction. A means for selecting one audio signal from the above two audio signals in accordance with the speed is provided, and during reproduction, in the case of high-speed mode reproduction, the reproduced audio signal is in the same state as when reproduced in the normal mode. A means for converting and reproducing is provided.

[0008]

According to the present invention, the audible voice can be reproduced even in the high speed mode reproduction by the above-mentioned structure.

[0009]

【Example】

(Embodiment 1) FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention.

In this embodiment, at the time of recording, the image is converted into an electric signal by the image signal source 111 and the image signal line 10 is converted.
It is sent to the recording magnetic head 108 via 9. on the other hand,
The sound is converted into an electric signal by the sound signal source 112,
It is sent to the voice conversion device 115 via the voice signal line 114. The sound conversion device 115 makes the first sound sound normal when reproduced in the normal mode from the original sound signal.
Voice signal of the normal mode and the second voice signal of the high speed reproduction which is heard normally when reproduced in the high speed mode are generated, and these two voice signals are respectively transmitted in the normal mode voice signal line 110. And voice signal line 116 for high speed mode
No. 2 is sent to the recording magnetic head 108 together with the video signal sent via the video signal line 109 via the two audio signal lines. The recording magnetic head 108 records one video signal and two audio signals described above on the recording magnetic tape 107 which is a recording magnetic medium. This recording magnetic tape 107 is first wound around the primary roller 106. The signal generated by the motor drive control device 101 is sent to the motor 103 via the control signal line 102 to drive the motor, and is transmitted to the secondary roller 105 via the drive transmission belt 104, so that the tape 107 is in the second state. Next roller 10
It is rolled up to 5. On the way to the recording magnetic head 10
A video / audio signal is recorded by 8.

As described above, in this embodiment, three kinds of signals are always recorded on the magnetic recording medium at the same time.

At the time of reproduction, the recording magnetic tape 107 on which two audio signals and one video signal are recorded is first recorded.
The signal that is wound around the primary roller 106 and that is generated by the motor drive control device 101 is the control signal line 10.
2 to the motor 103, the motor 103 is driven, and is transmitted to the secondary roller 105 via the drive transmission belt 104 to transfer the tape 107 to the secondary roller 1
It rolls up to 05. In the middle of this, the reproducing magnetic head 11
The video / audio signal is reproduced by 7. The reproduced video and audio signals are the same as when they were recorded. One video signal and the first sound that can be heard normally when reproduced in normal mode.
And the second audio signal which is normally heard when reproduced in the high speed mode, and these are reproduced through the video signal line 120 and the audio signal lines 118 and 119. It is sent to a device 123, for example a television CRT, for reproduction. On the other hand, the first and second audio signals are sent to the audio signal selection device 121, and here it is determined whether the motor drive control device 101 is currently driving the motor in the high speed mode or the normal mode. The signal shown is input via the reproduction speed signal line 113, and by judging this signal, the first audio signal that can be heard normally when reproduced in the normal mode or the first sound signal that can be heard normally when reproduced in the high speed mode. Select either one of the two audio signals and use it as the audio output signal line 1
24 to the audio reproduction device 1 via this signal line.
At 22, the normal sound is reproduced regardless of the high speed mode and the normal mode.

FIG. 2 shows a voice conversion device 11 according to this embodiment.
5 shows a block diagram of the internal configuration of FIG. With this audio conversion device, the audio signal obtained by the audio signal source is converted so as to be reproduced as the original audio when reproduced in the high speed mode. Next, how this voice converter performs the above conversion will be described.

In FIG. 2, a voice obtained from a voice signal source is input from a voice signal input section 401. The input audio signal is AD via the audio signal input line 402.
It is input to the converter 409. Primitive analog audio signal is A
The first storage unit 40 is converted to a digital audio signal by the D converter 409 and is passed through the digital audio signal line 410.
3 is stored. The first clock signal line 411 is a signal line of a clock signal that defines the timing at which this digital audio signal is stored in the first storage unit 403, and its waveform is shown in the first clock waveform diagram 413. The audio signal digitized by the AD converter 409 is stored in the first storage unit 403 at the timing of the rising edge of the clock signal shown in the first clock waveform diagram 413. The second storage unit 404 is also a memory for temporarily storing a digital voice signal having exactly the same structure as the first storage unit 403.
The storage unit 404 receives the digital audio signal stored in the first storage unit 403 as an input, and the clock signal defining the input timing is input from the second clock signal line 412. The clock signal input from the second clock signal line 412 has a clock cycle of the first clock signal 4
It is longer than 11. Specifically, for example, as shown in the second clock waveform diagram 414, it has a cycle twice as long as the first clock signal cycle. By doing this,
When the reproduction speed in the high speed mode is just twice that in the normal mode, when reproduced in the high speed mode, an audio signal reproduced at the same speed as the original sound is produced.

The digital audio signal thus stored in the storage unit 403 is input, and the second clock signal line 412 is input.
2nd according to the timing of the clock signal given from
The storage unit 404 stores digital audio signals.
As can be seen from the above description, every other half of the digital audio signal samples stored in the first storage unit 403 is the second audio signal sample.
The second half is stored in the storage unit 404, the other half is discarded, and the second
It is not stored in the storage unit 404.

The digital audio signal stored in the second storage unit 404 is output from its output unit to the digital audio signal line 405.
Is output to the DA converter 40.
Converted to analog voice signal at 6 and voice signal output line 4
It is output to 07.

As a result of the processing performed by the speech converting apparatus in this way, the original speech is reproduced when the reproduction speed in the high speed mode is exactly twice that in the normal mode and when the reproduction is performed in the high speed mode. The converted audio signal is output to the audio signal output unit 408.

(Embodiment 2) FIG. 3 is a block diagram showing the configuration of the second embodiment of the present invention.

In this embodiment, at the time of recording, the image is converted into an electric signal by the image signal source 311 and the image signal line 30
It is sent to the recording magnetic head 308 via 9. on the other hand,
The sound is converted into an electric signal by the sound signal source 312,
It is sent to the recording magnetic head 308 via the audio signal line 310.

In this embodiment, as in the case of the first embodiment, "a voice signal is once sent to a voice conversion device, and this voice conversion device sounds normal when reproduced in the normal mode from the original voice signal. Two audio signals, an audio signal and an audio signal that can be heard normally when played in high-speed mode, are created, and these two audio signals are respectively composed of an audio signal line for normal mode and an audio signal line for high-speed mode. It is not sent to the recording magnetic head via two audio signal lines. In the recording magnetic head 308, the video signal source 3
11 and one video signal and one audio signal which are obtained by the audio signal source 312 and are not converted at all
The data is recorded as it is on the recording magnetic tape 307 which is a recording magnetic medium. The recording magnetic tape 307 is first wound around the primary roller 306. Motor drive controller 3
The signal generated by 01 goes through the control signal line 302 to the motor 3
03, the motor 303 is driven, is transmitted to the secondary roller 305 via the drive transmission belt 304, and the magnetic tape 307 is wound around the secondary roller 305. A video / audio signal is recorded by the recording magnetic head 308 during this process.

At the time of reproduction, one audio signal and one video signal are recorded. First, the recording magnetic head 307
It is wound around the primary roller 306. The signal generated by the motor drive control device 301 is sent to the motor 303 via the control signal line 302, and the motor 303 is driven, and the motor 303 is driven by the secondary roller 30 via the drive transmission belt 304.
5, the magnetic tape 307 is transferred to the secondary roller 305.
Will be wound up in. In the middle of this, the reproducing magnetic head 321
The video / audio signal is reproduced by. The reproduced video signal and audio signal consist of one video signal and one audio signal that are normally reproduced when reproduced in the normal mode,
The video signals are sent to the video reproduction device 323 via the video signal line 322 and the audio signal line 324, respectively, and reproduced there.

Therefore, as can be seen from this, when the video signal is reproduced in the high speed mode, it is reproduced at a high speed, that is, faster than that originally obtained by the video signal source.

On the other hand, the audio signal is sent to the audio reproduction signal selection / selection speed conversion device 325 via the audio signal line 324, where the motor drive device 301 is currently driving the motor 303 in the high speed mode. A signal indicating whether the motor 303 is driven in the normal mode is the reproduction speed signal line 3
The audio signal input from the audio signal line 324 is input through the audio signal line 324, and the audio signal input from the audio signal line 324 is reproduced without changing the audio signal input from the audio signal line 324 without any change. It outputs to the device 327, for example, a speaker, and reproduces sound normally.

If it is judged by the reproduction speed signal 328 that the reproduction is being performed in the high speed mode, the speed of "selection of all or all" of the audio signal input from the audio signal line 324 is converted and recorded. The audio reproduction signal selection / selection speed conversion device 325 performs conversion to reduce the speed to the previous speed, that is, the speed that is most natural for humans, and then outputs the audio signal to the audio reproduction device 327, for example, a speaker via the audio signal line 326. However, also in this case, the first normal sound for human beings is reproduced.

The most important component in this embodiment is the audio reproduction signal selection / selection speed conversion device 32 in FIG.
It is 5. Especially, the center of this is the part that converts a voice signal that cannot be normally heard by the human ear when reproduced as it is because it was played in high-speed mode, to the normal speed, that is, the same speed as the original voice before it was stored. Is. In order to realize this part, the main part of the voice conversion device in the first embodiment and the voice conversion device 115 of FIG. 1 whose details of the main internal structure are shown in FIG. 2 can be used as they are.

This can be realized in this way. As a result of processing by the audio reproduction signal selection / selection speed conversion device 325 of FIG. 3, when reproduced in the high speed mode, the same normal audio signal as the original audio is output to the audio signal line 326.

[0027]

As is apparent from the above description of the embodiments, according to the present invention, it is possible to hear the sound normally while watching the image at high speed, which is extremely effective in practice.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a main part of a video / audio recording / reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a voice conversion device in the device.

FIG. 3 is a block diagram showing a configuration of a main part of a second embodiment of the same device.

FIG. 4 is a block diagram showing a configuration of a conventional video / audio recording / reproducing apparatus.

[Explanation of symbols]

 101 motor drive control device 103 motor 115 voice conversion device 121 voice signal selection device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 5/92 J 8324-5C

Claims (2)

[Claims] 1. A video / audio recording / reproducing apparatus for recording and reproducing video and audio, comprising a normal mode for reproducing at the same speed as during recording and a high speed mode for reproducing at higher speed than during recording. Means for reproducing at one speed, one video signal during recording, the first audio signal normally reproduced at the same speed as before recording when reproducing in normal mode, and one when reproducing in high speed mode A means for simultaneously recording the second audio signal converted so as to be reproduced normally as in the state of being reproduced at the same speed as before recording, and at the time of reproduction, it corresponds to the reproduction speed of the two recorded audio signals. A video / audio recording / reproducing apparatus having means for selecting and reproducing either one. 2. A video / audio recording / reproducing apparatus for recording and reproducing video and audio, wherein a normal mode for reproducing at the same speed as during recording and a high speed mode for reproducing at higher speed during recording are reproduced. A video / audio recording / reproducing apparatus having means for reproducing at one speed and means for converting a reproduced audio signal to a state equivalent to that at the time of reproducing in a normal mode when reproducing in a high speed mode.