JPH08124299A - Recording/reproducing device - Google Patents

Abstract

PURPOSE: To provide a recording/reproducing device which can record a sound from a microphone while reducing noise generated from a moving part. CONSTITUTION: A pulse generating circuit 34A generates a pulse signal during a period of time when the influence of noise from a lens driving part 2 is large on the basis of a control signal for controlling the lens driving part (moving part) 2 at the time of recording. At that time, an interpolation circuit 36 estimates a sound data modulated into PCM corresponding to the period of time when a pulse signal is generated from the front and rear sound data and replacing it with the estimated data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for converting sound into a PCM signal and recording / reproducing it together with a video signal.

[0002]

2. Description of the Related Art Conventionally, an 8 mm VTR or a digital VTR has been standardized as a device for converting sound into a PCM signal and recording and reproducing the same on a recording medium together with a video signal.

Further, an apparatus in which the recording / reproducing apparatus and the video camera are put in the same housing and integrated with each other has been commercialized. The configuration of a conventional camera-integrated VTR that converts this sound into a PCM signal and records it will be described with reference to FIG.

In FIG. 1, reference numeral 1 is a lens group for forming an image on the CCD image pickup device 5. When a focus or zoom change instruction is issued by the operation key 3, the lens control circuit 4 produces a control signal for the lens drive unit 2. The lens driving unit 2 is composed of a stepping motor or the like, and moves the lens group 1 to a desired lens position based on a control signal from the lens control circuit 4.

The video signal converted into an electric signal by the CCD image pickup device 5 is subjected to γ correction, color matrix processing and the like in a camera signal processing circuit 6.

The switch circuit 7 is a camera signal processing circuit 6
This is a circuit for selecting a signal from or an external video signal input to the video input terminal 11. If the video signal selected by the switch circuit 7 is in the case of 8 mm VTR, the video recording processing circuit 13 performs processing such as FM modulation of the luminance and low frequency conversion of the color signal, and in the case of the digital VTR. If so, processing such as AD shuffling and addition of error correction code is performed.

The switch circuit 14, as shown in FIG.
Video area 17a on the magnetic tape 17 and PCM audio area 1
7b is a switch circuit that switches so that each signal is recorded at a predetermined location. This switch circuit 14
The signal selected by is recorded on the magnetic tape 17 by the recording head 16 via the recording amplifier circuit 15.

Although a plurality of recording heads 16 are generally provided and signals may be simultaneously recorded in the video area 17a and the PCM audio area 17b, they are omitted in FIG. 1 for the sake of clarity. In many cases, the recording head 16 and the reproducing head 18 are also used in a consumer VTR, but they are shown separately for easy understanding.

When reproducing, the reproducing head 18 uses the magnetic tape 1
The track on 7 is scanned, and the reproduction signal amplified by the reproduction amplifier circuit 19 is obtained.
If it is from the above, it is sent to the video reproduction processing circuit 21 through the switch circuit 20. The video reproduction processing circuit 21 performs the reverse processing of the conversion processing performed by the video recording processing circuit 13, demodulates the original video signal, and outputs the demodulated video signal from the video output terminal 22.

On the other hand, the voice is converted into an electric signal by the microphone 9, and the voice signal is amplified by the amplifier 10. The switch circuit 8 is a circuit for selecting an audio signal from the microphone 9 or an external audio signal input to the audio input terminal 12. Generally, the switch circuit 7 for the video signal and the switch circuit 8 for the audio signal are interlocked, and the CCD image pickup device 5
When the video signal obtained from (1) is selected, the audio signal obtained from the microphone 9 is selected.

The audio signal selected by the switch circuit 8 is
The AD converter 23 converts the PCM signal into 10 to 16 bits per sample, and the voice recording processing circuit 28 performs shuffling processing or the like so that burst errors at the time of recording / reproducing are dispersed, and an error correction code adding circuit. At 29, an error correction code is added. In the switch circuit 14, the PCM audio signal is switched so as to be recorded in the PCM audio area 17b.

At the time of reproducing, the reproducing head 18 uses the magnetic tape 1
The track on 7 is scanned, and the reproduction signal amplified by the reproduction amplifier circuit 19 is obtained. If the reproduction signal is from the PCM audio area 17b, the clock is extracted by the PLL and "1", "0". The detected and restored digital data is passed through the switch circuit 20 to detect the error detection and correction circuit 3
A reproduction signal is sent to 0.

The error detection / correction circuit 30 performs detection and correction using an error correction code.
As shown in FIG. 10, the data in which the error flag is added with 1, for example, is sent to the audio reproduction processing circuit 31.

In the audio reproduction processing circuit 31, the shuffling performed at the time of recording is released, and the PCM signal is converted into the AD converter 2.
The data and the error flag are sent to the interpolation circuit 26 by being demodulated in the order in which they were sampled at 3. Interpolation circuit 26
Then, average value interpolation for predicting erroneous data with correct data before and after, and previous value interpolation when the error continues for a long time are performed. 11 and 12 are diagrams showing an example of this average value interpolation. FIG. 11 shows the case where one data has an error.
FIG. 12 shows a case where three data have an error. I don't know which value to take in the case of an error,
1, the generation of noise can be suppressed by interpolation as shown in FIG. For example, as shown in FIG.
Of the values (converted values) converted by the converter 23, the converted value D ₃
If one of the data has an error, the predicted value S ₃ = (D ₂ + D ₄ ) based on the conversion values D ₂ and D ₄ before and after the error value
/ 2 is obtained, and as shown in FIG.
If 3 data of ₁ , D ₂ and D ₃ are in error, S ₁ = (3
D ₀ + D ₄ ) / 4, S ₂ = (D ₀ + D ₄ ) / 2, S ₃ = (D ₀
+ 3D ₄ ) / 4 is calculated, and the predicted value S ₁ , between the conversion values D ₀ and D ₄ ,
Interpolation is performed with S ₂ and S ₃ .

The interpolated data is converted into an analog signal by the DA conversion circuit 32 and output from the audio output terminal 33.

[0016]

However, in recent years, the VTR with a built-in camera tends to be miniaturized, and the built-in microphone 9 and the lens driving unit 2 are brought close to each other. Therefore, in the above-mentioned conventional example, even if the noise generated from the lens driving unit 2 jumps into the microphone 9, it is recorded as it is.
There is a drawback in that noise is included even though the recording is high fidelity recording such as M recording.

Further, when the built-in microphone 9 approaches the rotary drum having the head, there is a drawback that noise generated when the head comes in contact with or away from the magnetic tape is recorded through the microphone 9. It was

Further, the camera-integrated VTR having the silver salt film camera function has a drawback that the sound of the optical shutter is also recorded.

Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a recording / reproducing apparatus capable of recording noise from a microphone while reducing noise generated from a movable portion. To do.

[0020]

According to a first aspect of the present invention, there is provided a recording / reproducing apparatus which has a movable portion and which outputs voice obtained from a microphone to a PC.
In a recording / reproducing apparatus for recording and reproducing after converting to M, pulse generating means for generating a pulse signal in a period in which noise as a noise from the movable portion is large based on a control signal for controlling the movable portion at the time of recording; And an interpolating unit that replaces the PCM-converted voice data with the data predicted from the voice data before or after the period.

According to a second aspect of the present invention, there is provided a recording / reproducing apparatus which has a movable part and which converts a voice obtained from a microphone into a PCM and records and reproduces the voice based on a control signal for controlling the movable part during recording. Pulse generation means for generating a pulse signal during a period when the influence of noise from the movable part is large,
Comparing means for comparing the PCM-converted voice data corresponding to the period with data predicted from the voice data before or after the period, and PCM-corresponding to the period according to the comparison result of the comparing means. And an interpolating unit for replacing the voice data with the predicted data.

According to a third aspect of the present invention, in the recording / reproducing apparatus, the interpolating means performs the replacement at the time of recording, and at the time of reproducing, eliminates a missing portion based on error information indicating missing data. It is characterized in that it is replaced with the data predicted from the preceding or following voice data.

According to a fourth aspect of the present invention, there is provided a recording / reproducing apparatus in which the movable portion is a lens group for image pickup.

According to a fifth aspect of the present invention, there is provided the recording / reproducing apparatus, wherein the movable portion is a rotary drum having a recording / reproducing head.

According to a sixth aspect of the present invention, in the recording / reproducing apparatus, the movable portion is an optical shutter.

[0026]

According to the recording / reproducing apparatus of the present invention, when the pulse generating means generates the pulse signal during the period in which the noise from the movable portion has a large influence on the basis of the control signal for controlling the movable portion during recording, interpolation is performed. The means replaces the audio data corresponding to the pulse signal generation period with data predicted from the audio data before or after the audio data. As a result, it is possible to reduce noise generated from the movable portion and record the voice from the microphone.

According to the recording / reproducing apparatus of the second aspect, the pulse generating means generates the pulse signal during the period in which the noise from the movable portion has a large influence on the basis of the control signal for controlling the movable portion during recording. The means compares the audio data corresponding to the pulse signal generation period with the data predicted from the audio data before or after the audio data. The interpolation means replaces the audio data corresponding to the predetermined period with the predicted data according to the comparison result. As a result, it is possible to reduce the noise generated from the movable portion and record the voice from the microphone, and it is possible to suppress the occurrence of distortion due to replacement by the interpolation means.

According to the recording / reproducing apparatus of the third aspect, the interpolation means replaces the missing portion based on the error information with the data predicted from the audio data before or after the missing portion at the time of reproduction. As a result, it can be used not only at the time of recording but also at the time of reproduction, and the circuit can be shared for recording and reproduction.

According to the recording / reproducing apparatus of the fourth aspect, by using the control signal for controlling the lens group as the control signal for controlling the movable portion, it is possible to reduce the recording of noise generated when the zoom or focus is changed. You can

According to the recording / reproducing apparatus of the fifth aspect, the recording of the noise generated between the head and the magnetic tape is performed by using the control signal of the rotary drum having the recording / reproducing head as the control signal for controlling the movable part. Can be reduced.

According to the sixth aspect of the invention, the recording of the shutter sound can be reduced by using the control signal of the optical shutter as the control signal for controlling the movable portion.

[0032]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the first embodiment of the recording / reproducing apparatus of the present invention. The parts corresponding to those in FIG. 8 used in the description of the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

The recording / reproducing apparatus according to the first embodiment is similar to the conventional apparatus in that the lens group 1 and the lens driving section (movable section).
2, operation keys 3, lens control circuit 4, CCD image sensor 5, camera signal processing circuit 6, switch circuit 7, switch circuit 8, microphone 9, amplifier 10, video input terminal 11, audio signal input terminal 12, video recording processing Circuit 13, switch circuit 14, recording amplifier circuit 15, recording head 16, reproducing head 18, reproducing amplifier circuit 19, switch circuit 20,
Video reproduction processing circuit 21, video output terminal 22, AD converter 23, audio recording processing circuit 28, error correction code addition circuit 29, error detection and correction circuit 30, audio reproduction processing circuit 3
1, a DA conversion circuit 32 and an audio output terminal 33 are provided, a pulse generation circuit 34A, a level difference detection circuit (comparing means) 35, an interpolation circuit 36, and an AD converter 23.
And a switch circuit 24 for selecting a converted value from the audio reproduction processing circuit 31 or a noise flag (pulse signal) n from the pulse generation circuit 34A or an error flag e from the audio reproduction processing circuit 31. Two
5 and.

The level difference detection circuit 35 includes the AD converter 23.
The absolute value of the difference between the converted value (converted value) D _i and the predicted value S _i obtained by the interpolation circuit 36

[0036]

## EQU1 ## | D _i −S _i | is calculated. Here, i is the sample number of the replacement period, and k is a threshold value larger than the value that fluctuates due to noise.

The pulse generation circuit 34A uses the noise flag n synchronized with the position of the data of the conversion value D _i based on the control signal generated by the lens control circuit 4 as a noise T from the lens driving section 2 during a period T which has a large influence. generated _n, and inputs to the interpolation circuit 36 selected by the switch circuit 25 if during recording the noise flag n. A specific example of the period T _n will be described later.

When the noise flag n is input from the pulse generation circuit 34A, the interpolation circuit 36 converts the conversion value D from the AD conversion value 23 corresponding to the noise flag n in the same manner as described with reference to FIGS. Mean value interpolation for replacing _i with the predicted value S _i is performed.

Here, the replacement by the interpolation circuit 36 will be specifically described with reference to FIGS.

FIG. 2 is a diagram showing the timing of the lens drive signal (control signal) C and noise. Lens control circuit 4
However, when the lens drive signal C for changing the position of the lens group 1 is changed, the stepping motor included in the lens drive unit 2 moves one step based on the lens drive signal C. Even if the lens drive signal C changes, there is a delay before the noise is generated due to the actual movement of the member and affecting the audio signal, and as shown in the figure, there is an effect after time T _1. . The turbulence of the waveform changes variously as shown by in the figure due to the difference in the lens position and other environments, but converges to a problem-free level after time T ₂ .
Therefore, the “period” T _n of the noise flag n generated by the pulse generation circuit 34A is after a lapse of a certain time since the lens control circuit 4 changes the position of the lens group 1 and the lens drive signal C is output. noise time T ₁ to the noise generated is set during the time T ₂ to converge to a level no problem. FIG. 3 is a diagram showing a change in audio data due to noise. In the same figure, it is assumed that the AD converter 23 has three sampling periods. The value (converted value) AD-converted by the AD converter 23 is D ₀ → D ₁ → D ₂ when there is no noise.
When noise enters the sound input that changes as → D ₃ → D ₄ , the conversion values D ₁ , D ₂ , and D ₃ fluctuate up and down, respectively, as shown in FIG. Therefore, the converted values D ₁ , D ₂ , D ₃ are
As shown in FIG. 4, there is a possibility of fluctuation due to noise. Therefore, the interpolation circuit 36 uses the level difference detection circuit 3
Absolute value of the difference calculated by 5

[0041]

Based on | D _i −S _i |, the absolute value of the difference becomes larger than the threshold value k during the replacement period of the conversion values D ₁ , D ₂ , and D ₃ .

[0042]

## EQU00003 _{## It} is determined whether or not there is a sample such as (| D _i −S _i |> k). If even one exists, the converted value is not replaced with the predicted value S _i . D _i is output as it is, and when there is no D _i , replacement with the predicted value S _i is performed.

Next, the operation of this embodiment will be described with the interpolating circuit 36 as the main part.

At the time of recording, when the voice signal of the microphone 9 is selected by the switch circuit 8, the voice signal is changed to the AD converter 2
At 3, it is converted into a PCM signal. The converted PCM signal is selected by the switch circuit 24 and input to the interpolation circuit 36 during recording.

On the other hand, when the operator operates the operation keys 3 to give an instruction to change the focus or zoom, the lens control circuit 4
Creates a control signal. The pulse generation circuit 34A generates the noise flag n based on the created control signal. The generated noise flag n is selected by the switch circuit 25 and input to the interpolation circuit 36 during recording.

The interpolation circuit 36 includes a PCM from the microphone 9.
Noise flag n from the voice signal and pulse generation circuit 34A
And are entered.

If the noise flag n from the pulse generating circuit 34A is, for example, 3 consecutive samples, the interpolating circuit 36 is
Average value interpolation is performed in the same manner as shown in FIG. That is,
The interpolation circuit 36 predicts an intermediate value from the conversion values D ₀ and D ₄ before and after the noise flag n is continuous and predicts the predicted values S ₁ , S ₂ ,
Find S ₃ . That is, S ₁ = (3D ₀ + D ₄ ) / 4, S
₂ = (D ₀ + D ₄ ) / 2 and S ₃ = (D ₀ + 3D ₄ ) / 4 are calculated.

On the other hand, the level difference detection circuit 35 uses the absolute value of the difference between the conversion value D _i input from the AD converter 23 and the predicted value S _i calculated by the interpolation circuit 36.

[0049]

## EQU4 ## Calculate | D _i −S _i |.

The interpolation circuit 36 uses the absolute value of the difference calculated by the level difference detection circuit 35.

[0051]

Based on | D _i −S _i |, the absolute value of the difference is the threshold value k during the replacement period of the converted value D _i.
Get bigger.

[0052]

## EQU6 _{## It} is determined whether or not there is a sample such as (| D _i −S _i |> k). If there is even one, the converted value D _i is output as it is without replacement with the predicted value S _i , and if there is no one,
The prediction value S _i is replaced.

The output of the interpolation circuit 36 is recorded by transmitting a PCM audio signal from the switch circuit 27 to the audio recording processing circuit 28 during recording. Switch circuit 24 during playback,
25 is switched to the audio reproduction processing circuit 31 side, and the interpolation circuit 36 performs interpolation according to the error flag e as in the conventional example. The level difference detection circuit 35 does not operate during reproduction. The PCM audio signal interpolated by the interpolation circuit 36 is
It is converted into an analog signal by the DA converter 32 via the switch circuit 27 and is output from the audio output terminal 33.

The effect of the first embodiment will be described with reference to FIG. FIG. 5 is a diagram showing the relationship between loud voice data, a predicted value, and a threshold value. According to the first embodiment, during the replacement period of the conversion value from the AD converter 23,

[0055]

## EQU00007 _## If there is at least one sample such that | D _i −S _i |> k, the conversion value D _i is output as it is without replacement with the predicted value S _i . Therefore, noise can be reduced. That is, if there is a certain level of voice input to the microphone 9, the change may be larger than the expected change due to noise, as shown in FIG. In this case,
If the converted values D ₁ , D ₂ , D ₃ are replaced with the predicted values S ₁ , S ₂ , S ₃ , the fidelity may be deteriorated, and conversely noise or distortion may be heard. Further, when the replacement is not performed, the noise is recorded while including the noise as shown in FIG. 2. However, in general, if the sound is loud, the small sound or noise included in the noise is inconspicuous due to the masking effect. Are known. Therefore, when the sound is quiet, the replacement by interpolation can be performed to reduce the noise jumping into the microphone 9 for recording, and the replacement is not performed when there is a relatively high level audio input. Therefore, since it is possible to prevent distortion and noise that occur due to the replacement, it is possible to reduce noise from the lens driving system that jumps into the built-in microphone of the camera-integrated VTR. Further, the circuit for replacing the PCM audio data corresponding to the generation period of the noise flag n with the data created by predicting from the preceding and following PCM audio data, and the interpolation circuit for interpolating the error at the time of reproduction are used at the time of recording and reproduction. It is possible to reduce the number of circuit parts because it is used by switching.

In the present embodiment, the case where the period during which the influence of noise is large is 3 samples has been described, but the same effect can be obtained with other numbers of samples. Also, the interpolation circuit 36
Although the predicted value was calculated from the average value of each of the preceding and following 1 data, the same effect can be obtained even if the predicted value is calculated by another method and replaced. Further, as shown in FIG. 3, the interpolation circuit 36 may set a threshold as shown in FIG. 6 so as to be different depending on the position when the maximum value of fluctuation due to noise is different depending on the position where the replacement is performed. As a result, the replacement can be determined more accurately.

In the first embodiment, the noise reduction example when the noise of the lens driving section 2 jumps into the built-in microphone 9 has been described, but the microphone 9 has the head provided on the rotating drum and the tape 17. An example of noise reduction in the case where noise that occurs between the and the noises jumps in will be described.

FIG. 7 is a block diagram showing the essential parts of the second embodiment. This drawing is a rewriting of a part of FIG. 1 used in the first embodiment, and the omitted part is the same as the operation of the conventional example.

The recording / reproducing apparatus of the second embodiment is the first
In the same manner as in the above embodiment, the lens group 1, the lens driving unit 2, the operation keys 3, the lens control circuit 4, the CCD image pickup device 5, the camera signal processing circuit 6, the switch circuit 7, the switch circuit 8, the microphone 9, the amplifier 10, Video input terminal 11, audio signal input terminal 12, video recording processing circuit 13, switch circuit 14,
Recording amplifier circuit 15, reproduction amplifier circuit 19, switch circuit 20, video reproduction processing circuit 21, video output terminal 22, A
D converter 23, switch circuit 24, audio recording processing circuit 2
8, error correction code addition circuit 29, error detection and correction circuit 30, audio reproduction processing circuit 31, DA conversion circuit 32, audio output terminal 33, level difference detection circuit 35, and interpolation circuit 36
And a drum motor (movable part) 102 that rotates the rotary drum 101, and a motor control circuit 103 that controls the rotation speed and the phase of the drum motor 102.
And the pulse generation circuit 34B and the pulse generation circuit 34
And a switch circuit 25 for selecting the noise flag (pulse signal) n from B or the error flag e from the audio reproduction processing circuit 31.

The pulse generation circuit 34B is for generating the noise flag n based on the phase control information of the motor control circuit 103. The timing of the noise flag n is the head 1
The noise generated between the tape 03 and the tape 17 jumps into the microphone 9 and affects the output of the AD converter 23.

At the time of recording, the PCM from the AD converter 23
Similar to the first embodiment, the interpolation circuit 36 adaptively replaces the data of the audio signal to reduce noise.

According to the second embodiment, the same effect as that of the first embodiment can be obtained, and the camera-integrated type V
It is possible to reduce noise from the rotary drum drive system that jumps into the built-in microphone of the TR.

As another embodiment, various types of camera-integrated type incorporating a silver salt film camera have been proposed in recent years. The noise flag is generated from the shutter control signal and the interpolation circuit 36 replaces the audio data. This makes it possible to reduce noise in the shutter sound for recording.

[0064]

According to the present invention described in detail above, the following effects can be obtained.

According to the first aspect of the present invention, the pulse signal is generated based on the control signal of the movable portion that generates noise during the period when the noise from the movable portion is large, and the PCM audio data corresponding to that period is generated. Is replaced with the data created by predicting from the PCM voice data before or after,
It is possible to record the sound from the microphone by reducing the noise generated from the movable part.

According to the second aspect of the invention, the sound data corresponding to the period during which the noise from the movable part is greatly affected is compared with the data predicted from the sound data before or after the sound data, and the comparison result is obtained. Since the replacement is performed accordingly, if the difference from the predicted data is a predetermined value or more, the replacement is not performed, so that the distortion when a large input signal is input to the microphone input can be reduced.

According to the third aspect of the invention, a circuit for replacing the PCM voice data corresponding to the period in which the noise from the movable part is greatly influenced by the data produced by predicting from the preceding or following PCM voice data, and reproducing. It is also possible to reduce the number of circuit components by also using an interpolating circuit for interpolating an error in time and switching between recording and reproducing.

According to the fourth aspect of the present invention, by using the control signal for controlling the lens group as the control signal for controlling the movable portion, it is possible to reduce the recording of noise generated when zooming or changing the focus. .

According to the fifth aspect of the invention, the recording of noise generated between the head and the magnetic tape is reduced by using the control signal of the rotary drum having the recording / reproducing head as the control signal for controlling the movable part. You can

According to the sixth aspect of the invention, the recording of the shutter sound can be reduced by using the control signal of the optical shutter as the control signal for controlling the movable portion.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment.

FIG. 2 is a diagram showing a timing of a lens drive signal and noise.

FIG. 3 is a diagram showing a change in audio data due to noise.

FIG. 4 is a diagram showing sampled voice data and predicted values before and after.

FIG. 5 is a diagram showing a relationship between audio data of a loud sound, a predicted value, and a threshold value.

FIG. 6 is a diagram showing a relationship between audio data of a loud sound, a predicted value, and a threshold value.

FIG. 7 is a configuration diagram of main parts of a second embodiment.

FIG. 8 is a block diagram of a conventional example.

FIG. 9 is a diagram showing a video area and a PCM audio area on a magnetic tape.

FIG. 10 is a diagram showing timings of data and error flags.

FIG. 11 is a diagram showing an example of interpolation of one sample error.

FIG. 12 is a diagram showing an example of interpolation of a 3-sample error.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 lens group 2 lens drive part (movable part) 4 lens control circuit 9 microphone 13 video recording processing circuit 21 video reproduction processing circuit 23 AD converter 26 interpolation circuit 28 audio recording processing circuit 29 error correction code addition circuit 30 error detection and correction circuit 31 audio reproduction processing circuit 32 DA converter 34A, 34B pulse generation circuit 35 level difference detection circuit (comparing means) 101 rotating drum 102 drum motor (movable part) 103 motor control circuit

Claims (6)

[Claims] 1. A recording / reproducing apparatus having a movable part, which converts a voice obtained from a microphone into a PCM, and records and reproduces the PCM.
A pulse generation means for generating a pulse signal during a period during which a large influence of noise from the movable portion is generated on the basis of a control signal for controlling the movable portion during recording, and PCM-converted audio data corresponding to the period before the period. Alternatively, the recording / reproducing apparatus is provided with an interpolating means for replacing the audio data before and after with the predicted data. 2. A recording / reproducing apparatus having a movable part, which converts a voice obtained from a microphone into a PCM and records and reproduces the voice.
A pulse generation means for generating a pulse signal in a period in which influence from the movable portion as noise from the movable portion is large based on a control signal for controlling the movable portion during recording, PCM voice data corresponding to the period, and a period before the period. Alternatively, it comprises a comparing means for comparing the data predicted from the preceding and following audio data, and an interpolating means for replacing the PCM-converted audio data corresponding to the period with the predicted data according to the comparison result of the comparing means. A recording / reproducing apparatus characterized by the above. 3. The interpolation means performs the replacement at the time of recording, and at the time of reproduction, predicts a missing portion from audio data before or after the missing portion based on error information indicating that the data is missing. 3. The recording / reproducing apparatus according to claim 1 or 2, wherein the recording / reproducing apparatus replaces the data. 4. The recording / reproducing apparatus according to claim 1, wherein the movable portion is a lens group for image pickup. 5. The recording / reproducing apparatus according to claim 1, wherein the movable portion is a rotary drum having a recording / reproducing head. 6. The recording / reproducing apparatus according to claim 1, wherein the movable portion is an optical shutter.