JPH08292796A - Reproducing device - Google Patents

Abstract

PURPOSE: To shorten the reproducing time of a video and a voice by making the reproducing speed of the video and the voice with respect to the voice of sections which are not important so much to understanding automatically faster. CONSTITUTION: At a normal time, a control signal generating part 26, in the time of a time shortening reproducing mode, transmits the speed control signal corresponding to the reproducing speed magnification set at the time of starting a reproducing to a motor control part. Consequently, a capstan motor is driven to be rotated at a speed corresponding to the reproducing speed magnification set at the time of starting the reproducing at the normal time. Then, in the time of a time shortening reproducing mode, when the continuation length of the silent section calculated by a silence continuation length calculating part 25 becomes equal to or longer than a prescribed value, the control signal generating part 26 transmits the speed control signal corresponding to a prescribed reproducing speed magnification larger than the reproducing speed magnification set at the time of starting the reproducing to the motor control part. Consequently, in this case, the capstan motor is driven to be rotated at the speed corresponding to the reproducing speed magnification larger than the reproducing speed magnification set at the time of starting the reproducing. That is, the speed of the capstan motor is made faster.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing device for reproducing video and audio.

[0002]

2. Description of the Related Art In a video tape recorder (VTR), video and audio are reproduced at a reproduction speed set at the start of reproduction. When it is desired to reproduce in a short time, video and audio can be reproduced at a reproduction speed of double speed, for example.

However, when the reproduction is performed at a high reproduction speed such as double speed, the reproduced voice becomes difficult to hear. Therefore, a technique has already been developed in which the output speed of the audio is standardized by expanding the audio reproduced during the double speed reproduction of the VTR on the time axis. However, with this method, half of the voice is deleted.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a reproducing apparatus capable of automatically increasing the reproduction speed of video and audio for the audio in a section which is not so important for understanding, and shortening the reproduction time of the video and audio. The purpose is to provide.

It is an object of the present invention to provide a reproducing apparatus capable of automatically adjusting the reproduction speeds of video and audio according to the utterance speed of reproduced audio and providing an audio output which is easy to hear. To do.

[0006]

A first reproducing apparatus according to the present invention is a means for reproducing video and audio from a video source and a sound source, respectively, and the reproduced audio has a voice of a voice section or a duration of less than a predetermined value. When the sound is in the silent section, the means for reproducing and outputting the image and sound at the set reproduction speed at the start of reproduction, and the reproduced sound are
When the continuation length is a voice in a silent section of a predetermined value or more, a feature is provided that reproduces and outputs video and voice at a reproduction speed faster than a set reproduction speed at the start of reproduction.

According to the second reproducing apparatus of the present invention, means for reproducing the image and the sound from the image source and the sound source respectively, a judging means for judging whether the reproduced sound is the sound in the voice section or the sound in the silent section, the reproduction When the reproduced voice is a voice in a voice section or a voice in a silent section whose duration is less than a predetermined value, a means for playing back and outputting the video and voice at the set playback speed at the start of playback, and the played voice. However, when the duration is a voice in a silent section having a predetermined value or more, a means for playing back and outputting the video and the voice at a playback speed faster than the set playback speed at the start of playback is provided.

The first reproducing device or the second reproducing device is provided with means for deleting the reproduced sound when the reproduced sound is a sound in a silent section having a duration of a predetermined value or more. Good. Further, when the reproduced voice is a voice in a silent section whose duration is equal to or greater than a predetermined value, a unit may be provided that restores the pitch of the reproduced voice and outputs it.

In the third reproducing apparatus according to the present invention, the means for reproducing the image and the sound from the image source and the sound source, the means for detecting the utterance speed of the reproduced sound, and the slower the detected utterance speed, It is characterized in that it is provided with means for increasing the reproduction speed of video and audio.

Discriminating means for discriminating whether the reproduced voice is the voice in the voice section or the voice in the silent section, and the reproduced voice is
When the voice of the voice section or the voice of the silent section whose duration is less than a predetermined value, means for performing time axis compression / expansion processing on the reproduced voice according to the current reproduction speed,
In addition, when the reproduced sound is a sound in a silent section whose duration is equal to or more than a predetermined value, the third reproducing device may be provided with means for deleting the reproduced sound.

[0011]

In the first reproducing apparatus according to the present invention, when the reproduced sound is the sound of the sound section or the sound of the silent section whose duration is less than the predetermined value, the video and the video are reproduced at the set reproduction speed at the start of reproduction. The sound is played and output. When the reproduced sound is a sound in a silent section whose duration is equal to or more than a predetermined value, video and sound are reproduced and output at a reproduction speed faster than the set reproduction speed at the start of reproduction.

In the second reproducing apparatus according to the present invention, it is determined whether the reproduced voice is the voice in the voice section or the voice in the silent section. When the reproduced sound is the sound in the sound section or the sound in the silent section in which the duration is less than the predetermined value, the video and sound are reproduced and output at the set reproduction speed at the start of reproduction. When the reproduced sound is a sound in a silent section whose duration is equal to or greater than a predetermined value, video and sound are reproduced and output at a reproduction speed faster than the set reproduction speed at the start of reproduction.

In the third reproducing device according to the present invention, the utterance speed of the reproduced voice is detected. Then, the slower the detected utterance speed is, the faster the reproduction speed of the video and audio is.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to a video tape recorder will be described below with reference to the drawings.

(1) Description of the first embodiment

FIG. 1 shows a video tape recorder (VTR).
Shows a schematic configuration of. The operation mode of the VTR includes a time-reduced reproduction mode capable of shortening the reproduction time, in addition to the general operation mode provided in the conventional VTR.

The two rotary heads 2 and 3 reproduce the video track of the video tape 1. The image reproduced alternately by the rotary heads 2 and 3 is supplied to the image reproducing circuit 5 via the head switching circuit 4 and converted into a video signal by the image reproducing circuit 5.

The audio head 6 reproduces the audio track of the video tape 1. The audio signal read by the audio head 6 is sent to the selector 7. The selector 7 constantly supplies the audio signal read by the audio head 6 to the audio reproduction circuit 8. The audio reproduction circuit 8 reproduces and outputs the input audio signal.

When the time shortened reproduction mode is set, the selector 7 sends the audio signal read by the audio head 6 to the audio analysis / processing section 9. The voice analysis / processing unit 9 analyzes the input voice signal and processes the input voice signal according to the analysis result.
In addition, the voice analysis / processing unit 9 outputs a speed command signal based on the voice analysis result.

The motor control unit 10 controls the capstan motor 11. The motor control unit 10 always operates on the basis of the reproduction speed set by an operation unit (not shown) and the like.
The capstan motor 11 is controlled. Then, in the time shortened reproduction mode, the motor control unit 10 controls the capstan motor 11 based on the speed command signal from the voice analysis / processing unit 9.

The operation when the time shortened reproduction mode is set will be described below.

FIG. 2 shows the configuration of the voice analysis / processing section 9.

The voice analysis / processing unit 9 includes a voice signal input unit 2
1, audio processing unit 22, audio signal output unit 23, section determination unit 24, silence duration calculation unit 25, and control signal generation unit 26.
It has.

The audio signal input section 21 is provided with, for example, an amplification section, an A / D conversion section, a frame memory and the like. The signal input to the audio signal input unit 21 is amplified,
It is converted into a digital signal and stored in the frame memory. The output of the voice signal input unit 21 is sent to the section discrimination unit 24 and the voice processing unit 22.

In this embodiment, the case where an analog signal is input to the voice analysis / processing unit 9 has been described, but the digital signal read from the IC memory or the like is used as the voice analysis / processing unit 9.
May be input to. In this case, it is not necessary to provide the audio signal input unit 21 with an A / D conversion unit.

The section discriminating section 24 discriminates whether the input signal is a voice section or a silent section. Section discriminator 2
In 4, for example, it is determined whether the audio data for one frame stored in the frame memory of the audio signal input unit 21 is in the silent section or the audio section.

The determination as to whether it is a silent section or a voice section is made, for example, by determining whether the power average of the voice data for one frame stored in the frame memory of the voice signal input unit 21 is equal to or more than a given threshold value. Is done by or. That is, if the power average is greater than or equal to the given threshold, it is determined to be a voice section, and if the power average is less than the given threshold,
It is determined to be a silent section.

More specifically, the average power value P of the audio data for one frame read from the frame memory of the audio signal input section 21 is calculated. This average power value P is given by the following equation 1 when the amplitude of each sampled voice data in one frame is i ₀ , i ₁ , ... i _{N -1} (N is the number of voice data for one frame). It is calculated.

[0029]

[Equation 1]

The calculated average power value P is the threshold value T
Compared with h. When the average power value P is greater than or equal to the threshold value Th (P ≧ Th), a signal indicating that the current frame is in the voice section is output when the average power value P is less than the threshold value Th (P <Th). The section discriminating unit 24 outputs a signal indicating that the frame is in the silent section. The determination result by the section determination unit 24 is sent to the silence duration calculation unit 25 and the control signal generation unit 26.

In the silent duration calculating unit 25, the section discriminating unit 2
The continuous length (the number of continuous frames) of the silent section determined by 4 is calculated. The duration of the silent section calculated by the silence duration calculation unit 25 is sent to the control signal generation unit 26.

In the time shortened reproduction mode, the control signal generator 26 normally sends a speed control signal to the motor controller 10 according to the reproduction speed magnification set at the start of reproduction. Therefore, in the time shortened reproduction mode, normally, the capstan motor 11 is rotationally driven at a speed according to the reproduction speed magnification set at the start of reproduction.

In the time shortened reproduction mode, when the duration of the silent section calculated by the silence duration calculation unit 25 becomes equal to or greater than a predetermined value, the control signal generation unit 26 causes the reproduction speed multiplication factor set at the start of reproduction. A speed control signal corresponding to a larger predetermined reproduction speed magnification is sent to the motor control unit 10. Therefore, when the duration of the silent section becomes equal to or greater than the predetermined value, the capstan motor 11 is rotationally driven at a speed according to the reproduction speed multiplication ratio that is larger than the reproduction speed multiplication ratio set at the start of reproduction. That is, the speed of the capstan motor 11 is increased.

When the section discriminating section 24 detects a voice section after the duration of the silent section exceeds a predetermined value, the control signal generating section 26 controls the speed according to the reproduction speed magnification set at the start of reproduction. A signal is sent to the motor controller 10. Therefore, the rotation speed of the capstan motor 11 returns to the speed corresponding to the reproduction speed magnification set at the start of reproduction.

When the duration of the silent section is equal to or greater than a predetermined value, the control signal generation unit 26 sends a voice processing control signal to the voice processing unit 22. The voice processing unit 22 is shown in FIG.
As shown in, the selector 31 and the voice deletion unit 32 are provided. The selector 31 receives the audio processing control signal from the control signal generator 26, that is,
When the duration of the silent section is equal to or greater than the predetermined value, the input voice signal is sent to the voice deletion unit 32. Therefore, the voice deletion unit 32 deletes the input voice signal in which the duration of the silent section is equal to or greater than the predetermined value.

The voice signal in the voice section and the voice signal in the silent section whose duration is less than a predetermined value are sent to the voice signal output unit 23 via the selector 31. That is, in this embodiment, in the time shortened reproduction mode, only the audio signal in the audio section and the audio signal in the silent section whose duration is less than the predetermined value are output via the audio signal output unit 23.

The audio signal output section 23 includes a D / A conversion section. The digital signal sent from the voice processing unit 22 to the voice signal output unit 23 is converted into an analog signal and output from the voice signal output unit 23. When a voice signal in the voice section and a voice signal in the silent section whose duration is less than a predetermined value are input, the playback speed is the playback speed set at the start of playback, so the voice signal and duration of the voice section are set. An audio signal in a silent section whose is less than a predetermined value is output at a speed according to the reproduction speed set at the start of reproduction.

In this embodiment, the voice analysis / processing section 9 outputs the voice signal as an analog signal. However, the voice analysis / processing section 9 may output the voice signal as a digital signal. In this case, it is not necessary to provide the audio signal output unit 23 with the D / A conversion unit.

In the first embodiment, when the time-reduced reproduction mode is set, the input voice in the silent section whose duration is equal to or longer than the predetermined value is deleted. Then, the reproduction speed is increased while the voice in the silent section having the duration of the predetermined value or more is input. Therefore, the reproduction time can be shortened.

FIG. 4 shows a modification of the voice processing section of FIG.

The voice processing unit 122 includes a selector 33 and a thinning processing unit 34. The selector 33 is
When the voice processing control signal from the control signal generation unit 26 is input, that is, when the duration of the silent section is equal to or more than a predetermined value, the input voice signal is sent to the thinning processing unit 34. The thinning-out processing unit 34 thins out the input audio signal at a compression ratio of 1 / n, where n is the currently set reproduction speed multiplication factor. The output audio signal of the thinning processing unit 34 is sent to the audio signal output unit 23.

If both the input and output signals of the voice analysis / processing unit 9 are analog signals, the voice signal output unit 23
The sampling frequency of the D / A conversion unit in the above is set to the standard sampling frequency f _SO, and the sampling frequency of the A / D conversion unit in the audio signal input unit 21 is assumed to be the currently set reproduction speed multiplication factor n. , N · f _SO .

When a voice in a silent section having a duration longer than a predetermined value is input, the reproduction speed multiplication factor n is, for example, 2
When set to, the sampling frequency of the A / D converter in the audio signal input unit 21 becomes 2f _SO . Further, the thinning-out processing unit 34 thins out two pitches of the input audio signal into one pitch. Therefore, the speed of the voice output from the voice signal output unit 23 is twice the standard voice speed,
The pitch is the pitch at the standard speed reproduction.

When the input / output signals of the voice analysis / processing unit 9 are both digital signals, the output of the data output from the voice signal output unit 23 is assumed, where n is the currently set reproduction speed multiplication factor. The input speed of the data input to the audio signal input unit 21 is set to be n times the speed.

The input voice signal in the voice section and the input voice signal in the silent section whose duration is less than a predetermined value are sent to the voice signal output unit 23 via the selector 33. When a voice signal in the voice section and a voice signal in the silent section whose duration is less than a predetermined value are input, the playback speed is the playback speed set at the start of playback, so the voice signal and duration of the voice section are set. An audio signal in a silent section whose is less than a predetermined value is output at a speed according to the reproduction speed set at the start of reproduction.

That is, in the time-reduced reproduction mode, the reproduction speed is increased while the voice of the silent section having the duration of the predetermined value or more is input. Therefore, the reproduction time can be shortened. Then, the audio signal in the silent section whose duration is equal to or greater than a predetermined value is output after being thinned out at a compression rate 1 / n, where n is the reproduction speed magnification at that time. Therefore, the voice signal in the silent section whose duration is equal to or greater than the predetermined value is
The pitch is returned to the pitch at the standard speed reproduction and output.

(2) Description of the second embodiment

FIG. 5 shows a video tape recorder (VTR).
Shows a schematic configuration of. The operation mode of the VTR includes, in addition to the general operation mode provided in the conventional VTR, a reproduction speed variable reproduction mode in which the reproduction speed is controlled according to the utterance speed to obtain an output sound that is easy to hear. .

The two rotary heads 2 and 3 reproduce the video track of the video tape 1. The image reproduced alternately by the rotary heads 2 and 3 is supplied to the image reproducing circuit 5 via the head switching circuit 4 and converted into a video signal by the image reproducing circuit 5.

The audio head 6 reproduces the audio track of the video tape 1. The audio signal read by the audio head 6 is sent to the selector 7. The selector 7 constantly supplies the audio signal read by the audio head 6 to the audio reproduction circuit 8. The audio reproduction circuit 8 reproduces and outputs the input audio signal.

When the reproduction speed variable reproduction mode is set, the selector 7 sends the audio signal read by the audio head 6 to the audio analysis / processing section 12.
The voice analysis / processing unit 12 analyzes the input voice signal and processes the input voice signal according to the analysis result.

The utterance speed detection unit 13 detects the utterance speed based on the output of the voice analysis / processing unit 12, and outputs a speed command signal based on the detected utterance speed.

The motor control unit 10 controls the capstan motor 11. The motor control unit 10 always operates on the basis of the reproduction speed set by an operation unit (not shown) and the like.
The capstan motor 11 is controlled. Then, in the reproduction speed variable reproduction mode, the motor control unit 10 controls the capstan motor 11 based on the speed command signal from the vocalization speed detection unit 13.

The operation when the reproduction speed variable reproduction mode is set will be described below.

FIG. 6 shows the configuration of the voice analysis / processing section 12.

The voice analysis / processing unit 12 includes a voice signal input unit 41, a section discrimination unit 42, a signal processing unit 43, and a voice memory 4.
4, an unread data storage amount calculation unit 45 and an audio signal output unit 46. The signal processing unit 43 includes a time axis compression / expansion unit 51, a deletion unit 52, and the like.

The audio signal input section 41 is provided with, for example, an amplification section, an A / D conversion section, a frame memory and the like. The signal input to the audio signal input unit 41 is amplified,
It is converted into a digital signal and stored in the frame memory. The output of the audio signal input unit 41 is sent to the section discrimination unit 42 and the signal processing unit 43. In this embodiment, the case where an analog signal is input to the voice analysis / processing unit 12 is shown, but a digital signal read from an IC memory or the like may be input to the voice analysis / processing unit 12. In this case, it is not necessary to provide the audio signal input unit 41 with an A / D conversion unit.

In the section discriminating section 42, the section discriminating section 2 shown in FIG.
Similar to 4, it is determined whether the input signal is a voice section or a silent section. The determination result of the section determination unit 42 is sent to the signal processing unit 43.

In the signal processing section 43, the input signal sent from the voice input section 41 is processed according to the discrimination result of the section discrimination section 42. That is, the deletion unit 52 deletes the input signal in the silent section whose duration is equal to or greater than the predetermined value. For the input signal of the voice section and the input signal of the silent section whose duration is less than the predetermined value, the time axis compression / expansion unit 51 sets the current reproduction speed multiplication factor to n.
The time axis compression / decompression process is performed at a compression rate of / n or more.

As the time axis compression / expansion method used in the time axis compression / expansion unit 51, for example, an overlap addition method by pointer movement control (Pointer Interval Control Overlap and
Add: PICOLA), TDHS (Time Domain Harmonic Scaling)
There are laws etc.

A method of compressing an input signal (input audio data to the time axis compression / expansion unit 51) at a compression rate of 2/3 using PICOLA will be briefly described with reference to FIG.
First, the pitch period is extracted from the input signal. The extracted pitch period is Tp. A weight (weighting function K1) that linearly goes from 1 to 0 is added to the waveform A to create the waveform A ′. 0 to 1 for waveform B
A weight (weighting function K2) toward
Is created.

Then, these waveforms A'and B'are added together to form a waveform A '* B' of length Tp.
These weights are added to maintain continuity at the connection points before and after the waveform A ′ * B ′. Then the pointer becomes
The same operation is performed after moving by 3 Tp, which is the length determined based on the compression rate. As a result, two waveforms A ′ * B ′ and C are obtained from the three waveforms A, B, and C. In this way, the signal for 3 pitch periods is compressed into the signal for 2 pitch periods.

The output of the signal processing unit 43 is the audio memory 44.
After being temporarily stored in, the audio signal is output to the audio signal output unit 46. The audio signal output unit 46 includes a D / A conversion unit. The digital signal sent from the audio memory 44 to the audio signal output unit 46 is converted into an analog signal and output from the audio signal output unit 46. In this example,
Although the case where the voice signal is output as an analog signal from the voice analysis / processing unit 12 is shown, the voice signal may be output as a digital signal from the voice analysis / processing unit 12. In this case, it is not necessary to provide the audio signal output unit 46 with the D / A conversion unit.

If both the input and output signals of the voice analysis / processing unit 12 are analog signals, the voice signal output unit 4
The sampling frequency of the D / A conversion unit in 6 is set to the standard sampling frequency f _SO, and the sampling frequency of the A / D conversion unit in the audio signal input unit 41 is n when the current reproduction speed multiplication factor is n. _-Set to f _SO . Therefore, even during high-speed reproduction, the pitch of the output voice becomes the original pitch.

When the input / output signals of the voice analysis / processing unit 12 are both digital signals, assuming that the current reproduction speed multiplication factor is n, the output speed of the data output from the voice signal output unit 46 is Thus, the input speed of the data input to the audio signal input unit 41 is set to be n times. Therefore, even during high-speed reproduction, the pitch of the output voice becomes the original pitch.

The unread data storage amount calculation unit 45 calculates the amount of audio data written in the audio memory 44 but not read (unread data storage amount).

The output of the voice analysis / processing section 12 is also sent to the speaking rate detection section 13. The utterance speed detection unit 13 detects the utterance speed of the voice being reproduced, based on the output signal of the voice analysis / processing unit 12.

When the utterance speed of the audio being reproduced is slow, the reproduction speed of the video and audio is increased. That is, when the utterance speed of the voice being reproduced is slow, the utterance speed detection unit 13 supplies the speed command signal to the motor control unit 10 so that the rotation speed of the capstan motor 11 is increased.

On the other hand, when the utterance speed of the sound being reproduced is high, the reproduction speed of the image and sound is decreased.
That is, when the utterance speed of the sound being reproduced is high, the utterance speed detection unit 13 supplies the speed command signal to the motor control unit 10 so that the rotation speed of the capstan motor 11 becomes slow.

For example, when the reproduction speed is set to double speed at the start of reproduction in the variable reproduction speed reproduction mode, the reproduction speed multiplication factor is always double, and the input voice and duration of the voice section are predetermined. The input voice in the silent section having a value less than the value is, for example, compressed by the time axis compression / expansion unit 51 at a compression rate of 2
It is compressed and expanded at / 3 and output. In addition, the deletion unit 52 deletes the input voice in the silent section whose duration is equal to or more than a predetermined value.

Then, according to the utterance speed detected by the utterance speed detection unit 13, between the reproduction speed magnifications 1 and 2,
The playback speed is controlled. The reproduction speed is controlled so that the reproduction speed multiplication rate becomes closer to 1 as the utterance speed detected by the utterance speed detection unit 13 becomes faster.
The reproduction speed is controlled so that the reproduction speed magnification becomes closer to 2 as the utterance speed detected by 3 becomes slower.

An example of the relationship between the reproduction speed and the compression rate used in the time axis compression / expansion unit 51 in this case is shown in the following table.

[0073]

[Table 1]

The following method is used as a method for detecting the vocalization rate.

(A) The utterance speed is detected based on the unread data storage amount in the voice memory 44 calculated by the unread data storage amount calculation unit 45. It is determined that the utterance speed is higher as the unread data storage amount is larger.

(B) The utterance speed is detected based on the temporal change amount of the unread data storage amount of the voice memory 44.
It is determined that the utterance speed is higher as the temporal change amount of the unread data storage amount of the voice memory 44 is larger.

(C) The utterance speed is detected based on the ratio of the voice section and the silent section per unit time. It is determined that the utterance speed is higher as the total sum (time) of the voice sections per unit time is longer.

(D) The utterance speed is detected based on the number of vowels per unit time. It is determined that the higher the number of vowels per unit time, the faster the utterance speed.

(E) The utterance speed is detected based on the amount of change in the frequency component per unit time. It is determined that the speaking rate is faster as the amount of change in the frequency component per unit time is larger.

In the above embodiment, in the reproduction speed variable reproduction mode, the utterance speed of the reproduced voice message is detected based on the output of the voice analysis / processing section 12. However, in the case of using the utterance speed detection methods (c), (d), and (e), the utterance speed of the voice message can be detected based on the input signal of the voice analysis / processing unit 12. That is, the above (c),
When using the speech rate detection methods of (d) and (e),
As shown in FIG. 8, the utterance speed detection unit 13 may be provided in front of the voice analysis / processing unit 12.

In the second embodiment, when the reproduction speed variable reproduction mode is set, the voice analysis / processing unit 12
The higher the utterance speed of the sound output from the audio head or the higher the utterance speed of the sound output from the audio head 6, the slower the reproduction speed of the image and the sound, so that the output sound that is easy to hear can be obtained.

[0082]

According to the present invention, the reproduction speed of video and audio can be automatically increased with respect to the audio in a section that is not so important for understanding. Therefore, the reproduction time of video and audio can be shortened.

According to the present invention, the reproduction speed of video and audio can be automatically adjusted according to the utterance speed of the reproduced sound, and a audible audio output can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a schematic configuration of a video tape recorder that is a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a voice analysis / processing unit in FIG.

FIG. 3 is a block diagram showing a configuration of a voice processing unit in FIG.

FIG. 4 is a block diagram showing a modified example of a voice processing unit.

FIG. 5 is a configuration diagram showing a schematic configuration of a video tape recorder which is a second embodiment of the present invention.

6 is a block diagram showing a configuration of a voice analysis / processing unit in FIG.

FIG. 7 is a schematic diagram for explaining a time axis compression / expansion method using PICOLA.

FIG. 8 is a configuration diagram showing a schematic configuration of a video tape recorder which is a modified example of the second embodiment of the present invention.

[Explanation of symbols]

 2 and 3 rotary head 5 video reproduction circuit 6 audio head 9 and 12 voice analysis and processing unit 10 motor control unit 11 capstan motor 13 vocalization speed detection unit 21 and 41 voice signal input unit 23 and 46 voice signal output unit 24 and 42 Section discriminating unit 22, 122 Audio processing unit 32 Deletion unit 34 Decimation processing unit 43 Signal processing unit 44 Audio memory 51 Time base compression / expansion unit 52 Deletion unit

Claims (6)

[Claims] 1. Means for reproducing video and audio respectively from a video source and a sound source, and when the reproduced audio is audio in an audio section or audio in a silent section whose duration is less than a predetermined value, the image and audio are reproduced. A means for playing back and outputting at the set playback speed at the start of playback, and when the played sound is sound in a silent section with a duration of a specified value or more A playback device having means for playing back and outputting at a fast playback speed. 2. A means for reproducing a video and a sound from a video source and a sound source, a judgment means for judging whether the reproduced sound is a sound in a voice section or a sound in a silent section, and the reproduced voice is a sound section. When the voice or the voice in the silent section whose duration is less than a predetermined value, the means for playing back and outputting the video and voice at the playback speed set at the start of playback, and the played voice, the duration of which is more than the predetermined value. In the case of the sound in the silent section, the reproducing device is provided with means for reproducing and outputting the image and sound at a reproduction speed faster than the set reproduction speed at the start of reproduction. 3. The reproduced voice according to claim 1, further comprising means for deleting the reproduced voice when the reproduced voice is a voice in a silent section having a duration of a predetermined value or more. Playback device. 4. The apparatus according to claim 1, further comprising means for restoring the pitch of the reproduced voice and outputting the reproduced voice when the reproduced voice is a voice in a silent section having a duration of a predetermined value or more. The playback device according to any one of 1. 5. A means for reproducing video and audio respectively from a video source and a sound source, a means for detecting the vocalization speed of the reproduced audio, and a faster reproduction speed of the video and audio as the detected vocalization speed becomes slower. A reproducing device having means for causing the reproducing device to operate. 6. A discriminating means for discriminating whether a reproduced voice is a voice in a voice section or a voice in a silent section, and the reproduced voice is a voice in a voice section or a voice in a silent section whose duration is less than a predetermined value. When the replayed sound is a means for performing time-axis compression / expansion processing on the replayed sound according to the current replay speed, and when the replayed sound is a sound in a silent section whose duration is equal to or longer than a predetermined value. The reproducing apparatus according to claim 5, further comprising: means for deleting the reproduced sound.