JPH08129832A - Disk recording device - Google Patents

Abstract

PURPOSE: To provide a disk recording device, wherein incontinuous noises produced caused by thread sending, etc., of a pickup are not so prominent in a recorded sound. CONSTITUTION: A disk recording device is constructed such that audio date for recording is temporarily stored in a recording processing memory and data read from the recording processing memory is recorded in an optional spot of a track formed in a disk by a pickup. This device is provided with a means for driving the pickup and a noise generating means 62 for generating noises within a frequency band including the frequency band of a noise component produced during driving of the pickup by this driving means. When recording is made on the disk, noises outputted from the noise generating means 62 are continuously superposed on the audio data for recording.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording apparatus suitable for application to a magneto-optical disk recording apparatus.

[0002]

2. Description of the Related Art A disk recording / reproducing apparatus using a magneto-optical disk as a recording medium has been put into practical use. As one of the recording systems using this magneto-optical disk, the data related to the recording data can be recorded in
There is a system in which a track is recorded on a predetermined track (innermost track) called "contents (index information)", and the address of the track to be reproduced is determined by referring to the TOC data during reproduction.

As one of the recording / reproducing controls using the TOC, there is a recording / reproducing control in which one set of data can be recorded on discontinuous tracks on the disc. That is, for example, as shown in FIG. 5, it is assumed that an audio signal of 74 minutes can be recorded on one disk, and the track number T is recorded on this disk.
It is assumed that the audio signals of four songs of 1, T2, T3 and T4 are recorded. Then, it is assumed that there are several minutes of unrecorded portions Ta, Tb, and Tc between the songs of the respective track numbers. In this state, for example, when a voice signal of a song having a length of 10 minutes is newly recorded on this disc as a track number T5, the total of the unrecorded portions Ta, Tb, Tc can record the voice signal for 10 minutes. If it is possible, Ta, Tb, T
The audio signal of the track number T5 is recorded at the location c by dividing it into three parts. Then, as the TOC information, the track number T
It is added that the song No. 5 is recorded at the addresses of Ta, Tb, and Tc.

When reproducing the track number T5, the recording positions Ta and T are recorded based on the TOC information.
b, Tc is determined by the playback system controller,
Control is performed to move the pickup for reading the recording signal from the disc to the corresponding track position. In this case, since the recording position is divided into Ta, Tb, and Tc, when it is reproduced as it is, the pickup moves between the recording positions Ta and Tb and between the recording positions Tb and Tc. While moving, the playback sound will be interrupted for the moving time of the pickup.

In order to prevent such interruption of the reproduced voice, the voice signal read from the disk is stored in the semiconductor memory, and when the reproduction is stable, the voice signal for several seconds is stored in this memory. There is a configuration in which reading from this memory is continuously performed in a constant state as long as reproduction is continued. Therefore, the recording signal is read from the disc several seconds ahead of the reproduction timing of the reproduction signal actually output from the reproduction device. Then, at the discontinuous portion of the recording position described above, the pickup is moved to the next recording portion while the audio signal stored in the memory is present. In this way, the audio signal recorded at the discontinuous portion can be continuously reproduced using the memory.

Also, when recording on a disc, a recording signal is temporarily stored in a memory in order to record a continuous audio signal at a discontinuous portion without omission.
The pickup is given enough time to move on the disc.

The movement of the pickup in such a case is a radial movement of the disk, which is called sled feeding.

On the other hand, some recording devices using a magneto-optical disk employ a recording method called a magnetic field modulation recording method. At the time of recording, a magnetic head is placed at a position facing the optical pickup with the disk interposed therebetween. Need to be placed. That is, when recording data on the disk, a process of recording the magnetic field generated by the magnetic head while irradiating the recording position with laser light from the optical pickup and heating is performed. During reproduction, the state of reflection of the laser light emitted from the optical pickup on the disc is detected and the recorded data is read. Therefore, the magnetic head is used only at the time of recording and is usually arranged at a position away from the disk in the apparatus, and the magnetic head is moved to a position close to the disk only at the time of recording.

The movement of the magnetic head is carried out by, for example, driving the recording start key of the recording apparatus and then driving it by a loading motor or the like. After the recording start key is pressed, the magnetic head is moved to a predetermined position. It takes a few seconds to move to the position of and can record to the disc. Then, until the recording on the disc is started, the input audio signal is stored in the semiconductor memory provided in the recording device, and actually, the audio signal input immediately after the recording start key is pressed is continuously input from the input audio signal. It is recorded on a disc.

[0010]

However, when recording is performed on the above-mentioned discontinuous portion and the thread of the pickup is fed during recording, noise caused by rotation of the thread feeding motor or the like is generated during recording. There is a disadvantage that this noise is generated and recorded in the sound being recorded. In particular, when a built-in microphone is used as a portable recording device, or when the microphone is placed in a position close to the device even in the case of an external microphone, it is easy for the microphone to pick up the sound generated in the recording device, There was the inconvenience of the noise caused by the rotation of the feed motor and so on.

Further, at the start of recording, when the magnetic head moves to the vicinity of the disk, noise due to the magnetic head driving motor or the like is relatively noticeable.
Since the movement of this magnetic head is always performed at the start of recording, if the microphone is built in as a portable recording device, or if the microphone is placed close to the device even if it is an external microphone, recording is not possible. There was an inconvenience that the noise due to the movement of the magnetic head was always recorded at the start.

Since all of these noises are noises which are discontinuously generated during recording, when the recorded audio data is reproduced, it is like noise of a spindle motor for continuously rotating the disk. It is more noticeable than the noise that occurs continuously in a steady manner.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a disk recording apparatus capable of making noise generated discontinuously due to thread feeding of a pickup or driving of a magnetic head inconspicuous.

[0014]

According to the present invention, there is provided a drive means for a pickup, a noise generating means for generating a noise in a frequency band including a frequency band of a noise component generated when the drive means drives the pickup, and a disk. And a recording control means for controlling the recording operation of (1), and when recording on the disc by the recording control means, the noise output from the noise generating means is continuously superimposed on the recording audio data. .

[0015]

According to the present invention, since noise including the same frequency band as the pickup driving noise is continuously superimposed on the recorded audio data, even if the pickup driving occurs discontinuously during recording, Only noise due to driving is not noticeable, and when the recorded audio data is reproduced, good reproduced sound with no noise is obtained.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In this example, a disk recording / reproducing apparatus is provided by a digital audio signal recording / reproducing system using a magneto-optical disk called a mini disk (MD), and its entire structure is shown in FIG. To configure. That is, reference numeral 11 in FIG. 2 denotes a disk cartridge in which a disk is housed, and a magneto-optical disk 12 having a diameter of 64 mm is housed in the cartridge 11. In this case, the disk 12 is mounted in the recording / reproducing apparatus while being stored in the cartridge 11, and is rotationally driven by the spindle motor 13. Then, the recording signal recorded by the magnetic field modulation on the track formed in the spiral or concentric shape on the disk 12 is read by the optical pickup 15, and the reproduction signal is modulated / demodulated by the RF amplifier 16 by the modulation / demodulation processing circuit 17.
To demodulate the data modulated for recording. As the recording modulation and demodulation processing in the modulation / demodulation processing circuit 17, for example, digital modulation called 8-14 modulation (EFM) is performed. The processing in the modulation / demodulation processing circuit 17 is performed under the control of the disk control unit 19.

Address data is previously recorded on each track formed on the magneto-optical disk 12 by wobbling (meandering), and the address decoder 26 detects this wobbling information. That is, R
The reproduction signal output from the F amplifier 16 is applied to the address decoder 2
6, the address data recorded by wobbling is decoded by the decoder 26, and the decoded address data is supplied to the disk controller 19 via the modulation / demodulation processing circuit 17.

The audio data demodulated by the modulation / demodulation processing circuit 17 is supplied to the memory controller 30,
The data is temporarily stored in the RAM 31 connected to the memory controller 30. The RAM 31 is a data buffer for continuously outputting the audio data even when the reproduced data is temporarily interrupted, and can store the audio data for about 10 seconds when storing the two-channel stereo audio data. The data stored in the RAM 31 is supplied to the compression / expansion processing circuit 32. Then, the data compressed for recording by the compression / expansion processing circuit 32 is expanded to the original amount of data, the expanded data is converted into an analog signal by the digital / analog converter 33, and this analog signal is reproduced. It is supplied to the signal output terminal 34.

Further, the movement of the optical pickup 15 and the recording head 28, which will be described later, in the radial direction of the disk, that is, thread feeding, is controlled by the servo control circuit 18 based on a command from the disk control section 19, and the thread is driven by the drive circuit 20. It is performed by driving the feed motor 21. In this case, the reproduction signal output from the RF amplifier 16 is supplied to the servo control circuit 18 to perform servo control to follow the reproduction track. Further, the rotation drive by the spindle motor 13 is also performed under the control of the servo control circuit 18. The thread feeding control configuration under the control of the servo control circuit 18 will be described later.

The recording system is configured so that the analog audio signal obtained at the recording signal input terminal 35 is converted into digital data by the analog / digital converter 36, and then this digital data is compressed / expanded by the compression / expansion processing circuit 32. A compression process is performed, compressed audio data is supplied to the memory controller 30, and is temporarily stored in the RAM 31 connected to the memory controller 30. And this RA
The audio data read from M31 is modulated for recording by the modulation / demodulation processing circuit 17, and the modulated audio data is supplied to the head drive circuit 27, so that the recording head (magnetic head).
28 is driven.

Here, the recording head 28 is arranged right above the position where the optical pickup 15 irradiates the disc 12 with the laser (on the side opposite to the disc), and the sled feed motor 21 causes the optical pickup 15 and the radius of the disc simultaneously. It is threaded in the direction. The recording head 28 is usually arranged at a position distant from the disk 12, and the loading motor 14 is used only during recording.
Thus, the disk 12 is moved to a position close to the disk 12. The loading motor 14 is driven by the drive circuit 24 under the control of the servo control circuit 22 based on a command from the disk control unit 19.

In this way, the data is recorded by using the recording head 28 arranged near the disk 12. That is, at the time of recording, the optical pickup 15 drives the disc 12
A process of recording the magnetic field generated by the recording head 28 is performed while heating the recording portion with the laser beam applied to the recording head 28. This recording process is called a magnetic field modulation recording method.

Next, the structure of the audio signal input section of the disc recording / reproducing apparatus will be described. As shown in FIG. 3, the device of this example has a built-in microphone 61 so as to record an audio signal picked up by the microphone 61, and also has a microphone jack 70, which is connected to the microphone jack 70. A voice signal picked up by a microphone (not shown) can also be recorded. In addition,
In FIG. 3, reference numeral 100 denotes the entire recording / reproducing apparatus, and this recording / reproducing apparatus 100 includes an insertion portion 101 of the disc cartridge 11.

Here, the built-in microphone 61 is a monaural microphone for generating a 1-channel audio signal, and the microphone jack 70 can be connected to either a stereo microphone or a monaural microphone for generating a 2-channel audio signal. There is. FIG. 1 shows the specific configuration thereof. The microphone jack 70 includes a grounded terminal portion 71, a left channel audio signal terminal portion 72, and a right channel audio signal terminal portion 73. Together with the terminal portion 72,
And contacts 74, 75 in contact with 73. This terminal part 7
2, 73 and the contacts 74, 75 are contacted with each other when the plug (external microphone plug: not shown) is not inserted in the microphone jack 70. When the plug is inserted in the microphone jack 70, each terminal is Parts 72, 73
Is separated from the contact points 74 and 75 and is in a non-contact state.

An audio signal picked up and output by the built-in microphone 61 is supplied to the contacts 74 and 75. In this case, in this example, the white noise signal output from the white noise generation circuit 62 is superimposed on the audio signals obtained at the contacts 74 and 75 at a relatively low level. The white noise signal output from the white noise generation circuit 62 is noise in a band including the same frequency band as the noise generated when the loading motor 14 and the thread feed motor 20 are driven. Specifically, for example, it is pseudo noise randomly generated in a band of about 1 kHz to 2 kHz.

The built-in microphone 61 is a monaural microphone, which supplies the same 1-channel audio signal to the contacts 74 and 75, and also receives the white noise signal from the contact 7.
The same signal is supplied to 4,75. Further, the level of the white noise signal output from the white noise generation circuit 62 is the loading motor 14 or the thread feeding motor 20.
The noise generated at the time of driving by the microphone 61 is set corresponding to the level picked up by the microphone 61, and the lowest level at which these driving noises can be masked is a relatively small level that does not disturb the listening of the sound picked up by the microphone 61. And

Then, the voice signal (the voice signal from the built-in microphone 61 or the voice signal from the external microphone) obtained at each of the terminal portions 72 and 73 is analog-digital converted via the microphone amplifiers 63L and 63R of the left and right channels. To the digital recording block 1 (that is, the recording system circuit shown in FIG. 2). The analog / digital converter 36 converts the converted digital audio data into digital audio data of a predetermined format.
Is supplied to the disk 12 and recorded on the disk 12.

The disk recording / recording of the present example configured as described above
According to the playback device, when recording the voice picked up by the built-in microphone on the disc, the white noise signal is superimposed on the voice signal for recording, so when the voice recorded on the disc is played back, it is recorded. The noise due to the sled feeding of the optical pickup and the movement of the magnetic head, which were randomly performed, become inconspicuous. That is, in the case of the mini disk system as in this example, as described with reference to FIG. 4 in the conventional example, there is a possibility that thread feeding is frequently performed during recording. Even if it is performed inside, the generated noise becomes inconspicuous in the recorded voice. Similarly, noise caused by the movement of the magnetic head at the start of recording becomes inconspicuous.

Therefore, when the voice recorded on the disk is reproduced by using the built-in microphone, the noise caused by the sled feeding of the optical pickup and the movement of the magnetic head becomes inconspicuous, and the good voice is reproduced.

In this case, in this example, the white noise signal output from the white noise generating circuit 62 is superimposed and recorded only when recording is performed using the built-in microphone. Noise that is difficult to avoid can be well obscured.

When using an external microphone, it is relatively easy to prevent noise generated by the recording device from being picked up depending on the installation state of the microphone (for example, the microphone and the recording device are installed relatively far apart from each other). Therefore, even if the white noise signal is not superposed on the recorded voice, the noise generated irregularly in the device can be made inconspicuous, and the white noise signal is not superposed when the external microphone is used as in this example. However, good recording is possible.

However, some types of external microphones can be installed only in a state in which they are close to the main unit (for example, a type of microphone in which the main body of the microphone is directly connected to the jack). In such a case, when the external microphone is used. However, the white noise signal may be superimposed on the recorded voice. That is, the superimposition / non-superimposition of the white noise signal may be switched not by switching between the built-in microphone and the external microphone but by a switch that can be manually operated.

In the above embodiment, the built-in microphone is a monaural microphone, but a stereo microphone for obtaining two-channel audio signals may be built in.

Although the white noise signal is superimposed on the audio signal output from the built-in microphone in the above embodiment, the noise signal may be superimposed on another circuit. For example, noise converted into digital data may be superimposed on the digitally converted audio data.

Further, the necessary noise signal may be obtained by changing the gain of the amplifier circuit for amplifying the audio signal and changing the amount of noise generated by the processing in this amplifier circuit.

FIG. 4 is a diagram showing an example of the configuration in this case. For example, a contact 75 that contacts the terminal portion 73 for the audio signal of the right channel of the microphone jack 70 (this contact 75 is not plugged into the jack 70). Only when terminal 7
3), the audio signal from the microphone 61 is supplied via the resistor R2 and the capacitor C1. In this case, the connection point between the resistor R2 and the capacitor C1 is grounded via the resistor R3. This resistor R
2 and R3 function as resistors for lowering the sensitivity (level of the output audio signal) of the built-in microphone 61. Further, the side from which the power source + Vcc for operating the microphone 61 is obtained and one end of the resistor R1 are connected, and the resistor R1 is connected.
The other end of is connected to the terminal portion 73 side.

Then, the audio signal obtained at the terminal portion 73 (the audio signal from the external microphone connected to the microphone jack 70 or the audio signal from the built-in microphone 61) is fed to the + of the operational amplifier 64 constituting the microphone amplifier.
Supply to the side input terminal.

The connection point between the capacitor C1 and the contact 75 is grounded via a series circuit of resistors R4 and R5,
The midpoint of connection between the resistors R4 and R5 is connected to the base of the NPN transistor Q1. The emitter of the transistor Q1 is grounded, and the collector of the transistor Q1 is a resistor R6.
And a capacitor C2 to connect the negative input terminal of the operational amplifier 64. Further, the midpoint of connection between the resistor R6 and the capacitor C2 is grounded via the resistor R7, and the resistor R6
A resistor R8 connects the midpoint of connection between the capacitor C2 and the output of the operational amplifier 64.

The operational amplifier 6 which is a microphone amplifier
The audio signal output from the output unit 4 is supplied to the terminal 67 via the amplifier 65 that constitutes the automatic gain adjustment circuit. Then, after the audio signal obtained at the terminal 67 is supplied to an analog / digital converter (not shown) to be converted into digital data, recording processing is performed. In this case, the output gain of the amplifier 65 is detected by the gain control circuit 66, and automatic gain adjustment (AGC) is performed to control the gain of the amplifier 65 so that the detected gain falls within a certain range.

The operation of the circuit shown in FIG. 4 (the operation of the right channel will be described here, but the same operation will be performed for the left channel) will be described. First, when the plug of the external microphone is connected to the microphone jack 70, The terminal portion 73 separates from the contact 75, and the audio signal from the built-in microphone 61 is no longer supplied to the operational amplifier 64 side. In addition, the power supply + V via this resistor R1
There is no supply of cc to the microphone 61, and the microphone 61 does not operate. Furthermore, since the power supply + Vcc is not supplied to the microphone 61 side, the resistors R4 and R4 are
No power is supplied to the 5 side, and the transistor Q1 whose base is connected to the connection point of the resistors R4 and R5 is turned off.

Therefore, the gain of the operational amplifier 64 is equal to the resistor R8 which feeds back the output of the operational amplifier 64,
It is determined by the resistance value of the resistor R7 connected to the resistor R8. At this time, the resistance value is selected so that a relatively low gain is set. Since the gain of the operational amplifier 64, which is this microphone amplifier, is relatively low, the amplification processing of the audio signal with a good SN ratio is performed in this microphone amplifier, and the audio signal with less noise is supplied to the circuit in the subsequent stage for recording It is processed.

Next, the operation when the plug of the external microphone is not connected to the microphone jack 70, that is, when the built-in microphone 61 is used will be described. At this time, the terminal portion 73 comes into contact with the contact 75 and the resistor R1.
Power + Vcc is supplied to the microphone 61 via
The microphone 61 is operated by a power source supplied thereto, and a process of outputting a sound signal is performed. The audio signal output from the built-in microphone 61 is supplied to the operational amplifier 64 side via the contact 75 and the terminal portion 73. Also,
The power source + Vcc is also supplied to the resistors R4 and R5 connected to the contact 75, and the transistor Q1 whose base is connected to the connection point of the resistors R4 and R5 is turned on.

Therefore, the negative side input terminal of the operational amplifier 64 is connected to the resistors R6 and R7 and the feedback resistor R8 via the capacitor C2, and the gain of the operational amplifier 64 is equal to the gain of this resistor. R6, R7, R8
It is determined by the resistance value of. Here, since the resistor R6 is connected as compared with the case where the transistor Q1 is in the off state, the resistance value of the resistor connected to the − side input terminal of the operational amplifier 64 becomes higher accordingly. The gain of the operational amplifier 64 becomes high. Since the gain of the operational amplifier 64, which is the microphone amplifier, is increased, the amplification processing with a high gain is performed in this microphone amplifier, the SN ratio is slightly worse than that when an external microphone is used, and noise due to the amplification processing increases. A lot of noise will be mixed in the subsequent audio signal.

As described above, only when the built-in microphone 61 is used, by increasing the gain of the amplification circuit which constitutes the microphone amplifier, the amount of noise generated during the amplification processing in this amplification circuit increases, and the noise generation means The same effect as when the noise of is superimposed when using the built-in microphone is obtained. In the case of the configuration shown in FIG. 4, since the microphone amplifier also serves as the noise generating means, it is not necessary to separately provide the noise generating means, and the circuit configuration can be simplified accordingly.

In this example, the built-in microphone 6
When using 1, the level of the audio signal supplied from the microphone 61 is set to be low (that is, lower than the level of the audio signal supplied from the normal external microphone) by the resistors R2 and R3. Therefore, even if the gain of the operational amplifier 64, which is a microphone amplifier, is changed, the level of the audio signal output by the operational amplifier 64 is in a substantially constant range, and recording processing can always be performed at the same level. Further, even if the output level of the operational amplifier 64 varies slightly, the level of the audio signal is adjusted within a substantially constant range by the amplifier 65 as an automatic gain adjusting circuit connected to the subsequent stage of the operational amplifier 64. The recording process can be performed well.

Although FIG. 4 shows only the input portion of the right channel audio signal, the same circuit is configured for the input portion of the left channel audio signal. In this case, when the built-in microphone 61 is a monaural microphone, the audio signal output from one microphone 61 is commonly supplied to the contacts 74 and 75 of each channel, and when it is a two-channel stereo microphone, Only the audio signal of the channel corresponding to the contacts 74 and 75 of each channel is supplied.

Further, in the above-mentioned embodiment, the invention is applied to the recording / reproducing apparatus for the magneto-optical disk, but it is needless to say that the invention can also be applied to other disk system apparatus for performing similar recording.

[0049]

According to the present invention, since noise including the same frequency band as the drive noise of the pickup is continuously superimposed on the recorded audio data, even if the drive of the pickup occurs discontinuously during recording. Only the noise caused by this driving is not noticeable, and good audio data can be recorded without the noise being noticeable.

In this case, noise is superimposed only when recording is performed using the microphone built in the recording device, so that noise due to driving of the pickup is easily picked up by the microphone. The process of making noise due to discontinuous driving inconspicuous is performed, and the process of superimposing noise is performed well.

Further, since noise in the frequency band including the frequency band of the noise component generated when the head is driven by the magnetic head driving means for moving it to an arbitrary track position on the disk is generated, the thread is recorded during recording. Even if the feeding is performed intermittently, the noise caused by the discontinuous thread feeding becomes inconspicuous.

Further, since the thread feeding means attached integrally to the pickup is adapted to generate the noise in the frequency band including the frequency band of the noise component generated at the time of thread feeding, the thread feeding can be performed during recording. Even if it is performed intermittently, the noise due to this discontinuous thread feeding becomes inconspicuous.

Furthermore, when the amplifying means for amplifying the input recording audio data is used as the noise generating means and the noise generated by the noise generating means needs to be superimposed on the recording audio data, the amplifying means By making the gain higher than that at the normal time so as to increase the noise occurrence rate of this amplifying means, it becomes possible to easily generate noise and superimpose it by setting the gain of the amplifying means.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a circuit configuration of an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an overall configuration of a recording / reproducing apparatus according to an embodiment.

FIG. 3 is a perspective view showing the external appearance of an apparatus according to an embodiment.

FIG. 4 is a configuration diagram showing a circuit configuration of another embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an example of using a recording area of a disc.

[Explanation of symbols]

 11 Disk Cartridge 12 Magneto-Optical Disk 14 Loading Motor 15 Optical Pickup 19 Disk Controller 21 Thread Motor 61 Built-in Microphone 62 White Noise Generation Circuit 64 Operational Amplifier 70 Microphone Jack

Claims (6)

[Claims] 1. A disk recording apparatus for temporarily recording recording audio data in a recording processing memory and recording the data read from the recording processing memory at an arbitrary position of a track formed on a disk by a pickup, Drive means for the pickup, noise generating means for generating noise in a frequency band including a frequency band of noise components generated when the drive means drives the pickup, and recording control means for controlling a recording operation on the disc A disc recording apparatus, wherein the recording control means is configured to continuously superimpose the noise output by the noise generating means on the recording audio data when the recording is performed on the disc. 2. The disk recording apparatus according to claim 1, wherein the noise output by the noise generating means is recorded in the recording audio data only when audio data obtained from a microphone built in the apparatus is recorded in the disk. A disc recording device that is continuously superimposed. 3. The disk recording apparatus according to claim 1, wherein the driving means is sled feeding means for moving the pickup to an arbitrary track position of the disc, and the sled feeding means is the white noise generating means. A disk recording device that generates noise in a frequency band including a frequency band of a noise component generated when a pickup thread is fed. 4. The disk recording apparatus according to claim 1, wherein the driving means is a driving means for moving a magnetic head integrally attached to the pickup to the disk proximity position, and the noise generating means is used. A disk recording device in which the driving means generates noise in a frequency band including a frequency band of a noise component generated when the magnetic head is driven. 5. The disk recording device according to claim 1, wherein a white noise generating unit that randomly generates pseudo noise is provided as the noise generating unit. 6. The disk recording apparatus according to claim 1, wherein an amplifying means for amplifying the input recording audio data is used as the noise generating means, and the noise generated by the noise generating means is recorded as the audio data for recording. A disk recording apparatus in which the gain of the amplifying means is made higher than that in a normal time when it is necessary to superimpose it on the disk so as to increase the noise occurrence rate of the amplifying means.