JPH08124277A - Recording equipment of magneto-optical disk - Google Patents

Abstract

PURPOSE: To prevent a microphone from picking up noise generated by a motor or others when a magnetic head is driven and thereby to reduce the noise at the time of recording, by reducing the speed of the movement of a magnetic field generating means to a recording position. CONSTITUTION: At the time of a recording operation, a system controller 19 controls a loading motor 14 on the basis of a drive control signal from a servo control circuit 22 and makes a magnetic head 28 approach a magneto-optical disk 12. Switching over the servo circuit simultaneously, it controls the speed of rotation of a feed motor 21 to be 1/3 or 1/2 of that at the time of reproduction, corresponding to a stereophonic or monophonic mode, and makes an optical pickup 15 and the magnetic head 28 move in the direction of the radius of the magneto-optical disk 12. By making the speed of the movement of the optical pickup 15 and the magnetic head 28 in the direction of the radius of the disk 12 smaller than that at the time of reproduction in this way, the noise generated in a feed mechanism during the recording operation can be lessened.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A disk recording / reproducing apparatus using a magneto-optical disk as a disk-shaped optical recording medium has been put into practical use. On this magneto-optical disk, data related to recording data is recorded on the innermost track called TOC (Table Of Contents). At the time of reproducing the magneto-optical disk, the TOC data is referred to search the track to be reproduced.

In the case of such a magneto-optical disc, the TOC
As one of recording / reproduction control using the data recorded on the disc (hereinafter, simply referred to as TOC data), one set of data can be recorded on a discontinuous track on the disc. That is, for example, as shown in FIG. 6, it is assumed that an audio signal for 74 minutes can be recorded on one disk. Now, there are 4 track numbers T1, T2, T3, T4 on this disc.
It is assumed that the audio signal of the song is recorded. 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 music piece having a length of 10 minutes is newly recorded on this disc as the track number T5, the total of the unrecorded portions Ta, Tb, Tc is 10
Assuming that the voice signal for a minute can be recorded, as shown in FIG. 6, the voice signal of the track number T5 is recorded in three parts of Ta, Tb, and Tc. TOC
As data, the song of track number T5 is Ta, Tb, T
What is recorded at the address of c is added.

When reproducing the track number T5, the system controller controls the optical pickup to move between tracks indicated by the addresses of the recording positions Ta, Tb and Tc based on the TOC data. In this case, the recording position is divided into Ta, Tb, and Tc as shown in FIG.
During the movement of the optical pickup between a and Tb and the movement of the pickup between recording positions Tb and Tc, audio is interrupted as reproduction output for the moving time of the optical pickup.

In order to prevent such interruption of reproduction output, in the recording / reproducing apparatus using the above-mentioned magneto-optical disk, the data read from the disk is stored in the semiconductor memory for a few seconds as audio as reproduction output. . Therefore, the recorded data is read from the disc several seconds before the reproduction timing of the reproduction signal actually output from the recording / reproducing apparatus. When the recording position is discontinuous, for example, between the recording positions Ta and Tb, the data stored in the memory is output, and the optical pickup is moved to the next recording position until the data in the memory runs out. For example, the recording position Ta is moved to the recording position Tb. In this manner, the audio signal discretely recorded on the magneto-optical disk can be continuously reproduced using the memory.

When recording a voice signal on a disc,
In order to prevent the audio signal from being lost due to recording at a plurality of discrete recording positions on the disc, the audio signal to be recorded in the above-mentioned memory is temporarily stored, and the optical pickup is arranged between the plurality of discrete recording positions on the disc. Have time to move.

In such a case, the optical pickup is moved in the radial direction of the disc by the feeding device. The feed mechanism generally includes a feed motor and a mechanism for feeding an optical pickup.

In the above-mentioned magneto-optical disk recording / reproducing apparatus, when data based on a continuous audio signal is recorded on the magneto-optical disk, the magneto-optical disk is irradiated with a light beam by an optical pickup to form a recording film of the magneto-optical disk. Is heated to above the Curie temperature. At the same time,
A vertical magnetic field is applied to the magneto-optical disk by magnetic heads arranged at positions facing each other with the optical pickup and the magneto-optical disk sandwiched therebetween. The vertical magnetic field generated from this magnetic head is modulated based on the data to be recorded. As a result, the recording film of the magneto-optical disk is magnetized in the direction of the vertical magnetic field applied from the magnetic head, and data is recorded. When reproducing the data recorded on the magneto-optical disk, the magneto-optical disk is irradiated with a light beam whose output level is sufficiently lower than the recording output level. The polarization plane of the light beam applied to the magneto-optical disk is rotated by the magnetization direction of the recording film due to the Kerr effect. The recorded data is read by utilizing the rotation of the polarization plane of the light beam due to the Kerr effect. Therefore, the magnetic head is used only at the time of recording and is usually located at a position away from the magneto-optical disk in the device, and only when recording, the magnetic head is moved or moved up and down to a position close to or in contact with the disk. .

The movement of the magnetic head is performed, for example, by driving a loading motor or the like after the recording start key of the recording device is pressed. It takes several seconds after the recording start key is pressed until the magnetic head moves to a predetermined position and recording on the magneto-optical disk becomes possible. Here, in the case of the above-mentioned magneto-optical disc recording / reproducing apparatus, until recording on the magneto-optical disc is started,
The audio signal input is stored in the semiconductor memory of the recording device, and after the magnetic head moves to a predetermined position, the input audio signal stored in the memory is continuously recorded on the optical disc.

[0010]

However, as described above, when data is recorded at a plurality of discrete recording positions on the magneto-optical disk, the feeding operation of the optical pickup in the radial direction of the magneto-optical disk is performed during the recording operation. If this is done, there is the inconvenience that noise will occur due to the rotation of the feed motor of the feeding device, and the generated noise will be mixed with the data to be recorded and recorded together with the data. In particular, when a microphone is built in as a portable recording device, or when an external microphone is arranged at a position close to the device, the microphone easily picks up sound as noise generated in the recording / reproducing device, and the feed motor There was an inconvenience that the noise of rotating etc. was noticeable.

Further, at the start of recording, when the magnetic head moves to the vicinity of the disk, noise due to a driving motor for moving or moving the magnetic head up and down is relatively noticeable. Since the movement of the magnetic head is always performed at the start of recording, when the microphone is built in as a portable recording / reproducing apparatus or the microphone is arranged in the vicinity of the apparatus, it is relatively large at the start of recording. There was an inconvenience that noise was always recorded.

In view of the above points, an object of the present invention is to provide a magneto-optical disk recording apparatus capable of reducing noise generated by driving a magnetic head.

[0013]

According to the present invention, when the output signal from the microphone is recorded on the magneto-optical disk by the optical pickup and the magnetic field generating means, the moving speed of the magnetic field generating means by the elevating means to the recording position is slow. It controls to become.

[0014]

According to the present invention, by controlling the moving speed of the magnetic field generating means during recording of the output signal from the microphone so as to be slower than at other times, noise or the like generated on the device side during recording is suppressed. It is less likely that the microphone will be picked up and recorded on the recording medium.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A recording device for a magneto-optical disk according to the present invention will be described below in detail with reference to the drawings.

In this embodiment, a magneto-optical disk is used as a disk-shaped optical recording medium, and an apparatus for recording or reproducing an audio signal on the magneto-optical disk will be described as an example. The block diagram is shown in FIG.

A magneto-optical disk 12 is housed in the disk cartridge 11. Disk cartridge 11
Has a pair of openings (not shown) formed on the upper and lower surfaces of the disk cartridge body so as to face each other. A recording or reproducing operation is performed on the magneto-optical disk 12 housed through these openings. A shutter that opens and closes a pair of openings is further movably attached to the disc cartridge 11 in the disc cartridge body. The shutter is moved in a direction in which the pair of openings is opened by loading the disc cartridge 11 into the recording and / or reproducing apparatus, and the pair of opening portions is ejected when the disc cartridge 11 is ejected from the recording and / or reproducing apparatus. Is moved in the direction to close the.

The magneto-optical disk 12 includes a disk substrate, a recording film, and a protective film. The disk substrate is formed of a light transmissive material such as a synthetic resin such as polycarbonate or PMMA. Based on the address data, the disk substrate meanders in the radial direction of the magneto-optical disk (wobbl
e) The pregroove is formed in a spiral shape. The recording film is formed of a magneto-optical recording material such as TbFeCo in a thin film on the surface of the disk substrate on which the pre-groove is formed by a method such as vapor deposition and sputtering. The protective film is provided on the recording film by using an ultraviolet curable resin in order to protect the recording film.

The magneto-optical disk 12 has a data recording area and a catalog area in which catalog information is recorded. Data is discretely or continuously recorded in the data recording area along the pregroove. Recording of data in the data recording area of the magneto-optical disk 12 and reading of the recorded data are intermittently performed in units of one cluster. One cluster is composed of 32 sectors in which data is actually recorded and four linking sectors. The first three sectors of the four linking sectors are for preventing the interleaving of the CIRC applied to the data between the adjacent clusters. The remaining one sector following these is for sub data. One sector is further made up of a plurality of sound groups, and 11 sound groups make up a pair of two sectors. In this example,
One sector has 2352 bytes, of which 2332 bytes are for data. 1 sound group is 4
It is 24 bytes. Also, one sound group consists of 51 audio signals for the right channel and the left channel.
This is equivalent to 2 samples and a reproduction time of 11.61 msec.

In the catalog area, title information about the data or program recorded in the data area, address information such as start address and end address of each data or program, and connection relation of parts P as each small recording area. Is recorded. After the magneto-optical disk 12 is loaded into the recording / reproducing apparatus, this catalog area is read by an optical pickup described later before recording or reproducing data in the data recording area, and the data read from the catalog area will be described later. It is stored in a recording area in the system controller or a dedicated recording area provided in a buffer memory described later. The start address and end address recorded in the inventory area are each composed of 24-bit data. The upper 14-bit data is the cluster number, the next 6 bits are the sector number, and the lower 4 bits are the sound group number. ing. Correspondingly, the optical disk 12 meanders in the radial direction of the disk based on the signal modulated based on the address data including the addresses of the pre-groove cluster and the sector.
By demodulating the signal obtained by reading the pre-groove, the system controller, which will be described later, confirms and manages the recording position or the reproducing position during the recording or reproducing operation.

The spindle motor 13 rotationally drives the magneto-optical disk 12 so that the linear velocity is constant. The turntable 13 is provided on the tip side of the rotary shaft of the spindle motor 13.
a is provided. The magneto-optical disk 12 of the disk cartridge 11 loaded in the recording / reproducing apparatus is placed on the turntable 13a.

The optical pickup 15 has an objective lens 15a as shown in FIGS. Optical pickup 1
Reference numeral 5 denotes a laser light source, an optical system such as a beam splitter for separating a light beam emitted from the light source and a return light beam from the magneto-optical disk 12, and a photodetector for receiving the return light beam separated by the beam splitter. Including. The objective lens 15a focuses the light beam emitted from the light source of the optical pickup 15 onto the recording film through one opening of the disc cartridge 11 of the magneto-optical disc 12 and the disc substrate. The optical pickup 15 includes an actuator (not shown) that drives the objective lens 15a in the focusing direction and the tracking direction. A focusing servo signal and a tracking servo signal are supplied to this actuator from a servo control circuit described later. as a result,
The objective lens 15a is driven in the focusing direction and the tracking direction so that the focusing error signal and the tracking error signal are zero, and the focusing servo and the tracking servo are performed.

The magnetic head 28 faces the protective film side of the magneto-optical disk 12 through the other opening of the disk cartridge 11. The magnetic head 28 is the optical pickup 15
And the magneto-optical disk 12 are sandwiched between them, and they are arranged at opposite positions. The magnetic head 28 generates a vertical magnetic field corresponding to recording data based on a drive signal supplied from a head drive circuit described later. The generated vertical magnetic field is the magneto-optical disk 1
2 is applied to the recording film from the protective film side. Magnetic head 28
Is mechanically connected to the optical pickup 15, and when the optical pickup 15 moves in the radial direction of the magneto-optical disk 12, the magnetic head 28 also moves in the radial direction of the magneto-optical disk 12. Optical pickup 15 and magnetic head 2
The support structure of No. 8 will be described later. The magnetic head 28
It is moved to a recording position close to or in contact with the magneto-optical disk 12 only at the time of recording, and is held at a position separated from the magneto-optical disk 12 by the information of the recording position in an operating state other than during reproduction and recording.

The magnetic head 28 is the loading motor 1
4 moves up and down or moves between a first position close to or in contact with the magneto-optical disk 12 and a second position spaced from the magneto-optical disk 12. The rotation of the loading motor 14 is controlled based on the output signal from the loading motor control circuit 22 via the drive circuit 24. The rotation of the loading motor 14 is detected by a frequency generator 25 as a rotation detector. The frequency generator 25 outputs an FG pulse at a cycle corresponding to the rotation speed of the loading motor 14, and the FG pulse is controlled by the loading motor. It is supplied to the circuit 22. The loading motor control circuit 22 drives and controls the loading motor 14 via the drive circuit 24 so that the FG pulse supplied from the frequency generator 25 has a predetermined cycle.

A switch 23 is connected to the loading motor control circuit 22, and the drive speed of the loading motor 14 is changed by opening and closing the switch 23. The opening / closing operation of the switch 23 is controlled by a control signal from a system controller described later. That is,
The switch 23 is switched to an open state when recording a 2-channel signal, that is, a stereo signal on the magneto-optical disk 12, and is switched to a closed state when recording a 1-channel signal, that is, a monaural signal on the magneto-optical disk 12. . As a result, the loading motor 14 operates when the switch 23 is closed, that is, the magneto-optical disk 12
When recording a monaural signal, the drive speed is controlled so that the rotation speed is approximately 1/3 of the rotation speed when the switch 23 is in the open state, that is, when the stereo signal is recorded on the magneto-optical disk 12. For example, when recording a stereo signal, the magnetic head 28 moves from the second position to the first position in about 1 second.
When the monaural signal is recorded on the magneto-optical disk 12, the magnetic head 28 moves in about 3 seconds.
Moves from the second position to the first position.

The feed motor 21 supplies a driving force to a feed mechanism (not shown) based on a feed signal supplied from a servo control circuit described later to feed the optical pickup 15 in the radial direction of the magneto-optical disk 12. The feed mechanism is composed of, for example, a plurality of gears to which the driving force from the feed motor 21 is transmitted and a feed screw that feeds the optical pickup 15 in the radial direction. The feed motor 21 rotates a plurality of gears, and the rotation of the gear at the final stage is transmitted to the feed screw, and the optical pickup 15 and the magnetic head 28 are fed in the radial direction.

A / D (Analog to Digital) converter 36
Is an input signal supplied from the input terminal 35, for example, an analog audio signal from an external device connected to the device body, an analog output signal from a microphone connected to a jack described later, or a built-in device body described later. Sampling frequency of the analog audio signal as an analog output signal from the microphone 44.1
A digital signal is generated with KHz and a quantization bit number of 16 bits. In FIG. 1, for simplification, the analog audio signal input from the input terminal 35 is one channel, but in reality, it is a two-channel stereo signal of L and R. The same applies hereinafter.

D / A (Digital to Analog) converter 33
Performs processing reverse to that of the A / D converter 36 on a digital audio signal output from a compression / expansion device to be described later,
It is supplied to the output terminal 34 as an analog audio signal.

The compression / expansion device 32 is supplied with the digital signal output from the A / D converter 36, for example, a digital audio signal. In the compression / expansion device 32, the supplied digital audio signal is data compressed to about ⅕. In this case, a modified DCT (Modified Discreat Cosine Transfo
rm) is used.

The digital data output from the compression / expansion device 32 is temporarily stored in the buffer memory 31 via the memory controller 30. The buffer memory 31 includes a DRAM (Dynamic Random
Access Memory) is used. Memory controller 3
0 controls writing and reading of data in the memory 31 described later. During the recording operation on the magneto-optical disk 12, the digital data output from the compression / expansion device 32 is written in the memory 31 by the memory controller 30 at a transfer rate of 0.3 Mbit / sec, and the data stored in the memory 31 is Memory 31 at a transfer rate of 1.4 Mbit / s
Is read from. During the reproducing operation of the magneto-optical disk 12,
Digital data output from an encoder / decoder described later is written in the memory 31 at a transfer rate of 1.41 Mbit / sec, and the data stored in the memory 31 is 0.
It is read from the memory 31 at a transfer rate of 3 Mbit / sec.

During the recording operation, the memory controller 30
If the recording position on the magneto-optical disk 12 does not cause a track jump that jumps to another position or another track due to a disturbance such as vibration, the compression output from the compression / expansion device 32 is performed. The digital data is sequentially read from the memory 31 at a transfer speed that is about 5 times the data writing speed to the memory 31. The digital data read from the memory 31 is supplied to the encoder / decoder described later.

When a track jump is detected during a recording operation on the magneto-optical disk 12 and a detection signal is supplied to a system controller described later, the memory controller 30 transfers digital data to an encoder / decoder described later. Is stopped, and the compressed digital data from the compression / expansion device 32 is stored in the memory 31.
Then, after the irradiation position of the light beam irradiated from the optical pickup 15 to the magneto-optical disk 12, that is, the position recording is corrected, the memory controller 30 restarts the transfer of digital data from the memory 31 to an encoder / decoder described later. Controls writing and reading of data to and from the memory 31. The recording position is corrected based on the address data of the magneto-optical disk 12.

The detection of whether or not a track jump has occurred is provided, for example, with a vibrometer provided in the recording / reproducing apparatus, and a system which will be described later determines whether or not the vibration detected by the vibrometer causes a track jump. This can be done by discriminating by the controller. Further, since address data is recorded in the pre-groove on the magneto-optical disk 12 as described above, the continuity of the decoded address data read from this address data at the time of recording and output from the address decoder described later will be described later. Track jumps can also be detected by monitoring with the system controller. Furthermore, the track jump may be detected by ORing (OR) the detection signal of the vibrometer and the signal that detects the continuity of the decoded address data. When a track jump is detected, the output level of the light beam emitted from the optical pickup 15 to the magneto-optical disk 12 is lowered to a level at which recording is not possible. Alternatively, the optical pickup 15 is controlled by the system controller described later so that the output level becomes zero.

In the above-mentioned case, the storage capacity of the memory 31 is required to have a minimum storage capacity for storing digital data corresponding to the period from the occurrence of the track jump to the correction of the recording position to the correct position. Become. In this example, as described above, the 4-Mbit DRAM is used as the memory 31, and this storage capacity satisfies the above-mentioned conditions.

During the recording operation, the memory controller 30 keeps the memory 3 as much as possible during the normal recording operation.
Memory 3 so that the data stored in 1 is reduced
The data write operation and the data read operation of No. 1 are controlled. That is, when the data amount of the memory 31 becomes equal to or more than a predetermined amount, a predetermined amount of data, for example, data of one cluster is read from the memory 31, and a storable area of a predetermined amount or more is always secured in the memory 31. To be done.

The digital data read out from the memory 31 in this way is EFM / CIRC encoder /
It is supplied to the decoder 17. Encoder / decoder 17
Then, the supplied digital data is subjected to an encoding process for error detection and correction and a modulation process suitable for recording. In this embodiment, EFM (8-14 modulation) processing is performed. In this embodiment, the code for error detection and correction is a so-called compact disc (CD) CIRC (Cross Interleave).
Reed-Solomon Code) with interleave changed.

The print data output from the encoder / decoder 17 is supplied to the head drive circuit 27. The head drive circuit 27 uses the magnetic head 28 based on the recording data.
Drive signal is generated and the drive signal is supplied to the magnetic head 28.

The RF amplifier 16 is supplied with the output signal from the photodetector of the optical pickup 15. RF amplifier 16
Is an RF signal as a read signal of the magneto-optical disk 12 based on the output signal from the photodetector of the optical pickup 15.
Generate a signal. In the case of the present embodiment, since the magneto-optical disk is used as the recording medium, the RF amplifier 16 outputs the RF signal based on the difference in the Kerr rotation angle of the light beam reflected by the recording film of the magneto-optical disk. This RF signal is supplied to the encoder / decoder 17. Further, the RF amplifier 16 generates a focusing error signal from the output signal from the photodetector based on the so-called astigmatism method. The RF amplifier 16 generates a tracking error signal based on the output signal from the photodetector based on the so-called 3-spot method.
The RF amplifier 16 generates a signal in which a meandering pre-groove is detected and a push-pull signal based on the output signal from the photodetector by the push-pull method, and supplies it to the address decoder. For the astigmatism method, for example, US Pat.
See 23,033. For the three-spot method, see, for example, U.S. Pat. No. 3,876,842. For the push-pull method, see, for example, US Pat. No. 3,909,608. The focusing error signal and the tracking error signal generated by the RF amplifier 16 are supplied to a servo control circuit described later. The RF amplifier 16 generates the generated RF
The signal is provided to a servo control circuit described below to generate a spindle servo signal.

The address decoder 26 is the RF amplifier 16
The push-pull signal generated by is supplied. The address decoder 26 sends the supplied push-pull signal to F
Address data is output by M demodulation. The address decoder output from the address decoder 26 is supplied to the encoder / decoder 17 to be decoded. The decoded address information is supplied to a system controller, which will be described later, and is used by the system controller, which will be described later, for confirming the recording position or reproducing position during recording or reproducing and for position control. The synchronization signal extracted from the address data decoded by the address decoder 26 is supplied to a servo control circuit described later to generate a spindle servo signal.

The servo control circuit 18 includes an RF amplifier 16
Is supplied with a focusing error signal, a tracking error signal, an RF signal, or a sync signal extracted from address data. The servo control circuit 18 generates a focusing servo signal, a tracking servo signal and a spindle servo signal based on these signals.
The focusing servo signal and the tracking servo signal are supplied to the actuator of the optical pickup 15,
Focusing servo and tracking servo are performed as described above. Spindle servo signal is RF signal,
Alternatively, it is generated based on either one of the synchronization signals extracted from the address data. The spindle servo signal is supplied to the spindle motor 13 via the drive circuit 20, and the spindle motor 13 causes the magneto-optical disk 1 to operate.
2 is controlled to rotate at a constant linear velocity (CLV).

Further, the servo control circuit 18 includes the drive circuit 2
Generate a send signal with 0. The generation of the feed signal by the servo control circuit 20 and the drive circuit 20 will be described later. The generated feed signal is generated based on the low frequency component of the tracking error signal. The feed signal is supplied to the feed motor 21 via the drive circuit 20, and the feed motor 21 supplies a driving force to a feed mechanism (not shown) based on the supplied feed signal to drive the optical pickup 15 and the magnetic head 28 to the magneto-optical disk. Twelve recording tracks are sent in the radial direction of the magneto-optical disk 12 as the light beam of the optical pickup 15 scans. The servo control circuit 18 generates an access signal based on an access command issued from a system controller described later, and supplies the access signal to the feed motor 21. In this case, an access signal is supplied to the feed motor 21 to move the optical pickup 15 and the magnetic head 28 in the radial direction of the magneto-optical disk 12 by a feed mechanism (not shown) by a distance corresponding to the access command.

The system controller 19 is composed of a microcomputer. An input unit 36 and a display unit 37 are connected to the system controller 19. The system controller 19 generates various control signals for starting and stopping a recording or reproducing operation, an access operation, and the like based on an input signal from the input unit 36, and also includes the servo control circuit 18 and the encoder / decoder 1.
7, the memory controller 30, the loading motor control circuit 22, and other parts of the recording and / or reproducing apparatus and the operation of the recording and / or reproducing apparatus. The output level of the light beam emitted from the optical pickup 15 is controlled by a control signal supplied from the system controller 19. The output level of the light beam emitted from the optical pickup 15 during the recording operation is an output level sufficient for recording, and when the system controller 19 recognizes that a track jump has occurred as described above, recording is not performed. The output level is immediately lowered to an impossible output level, for example, the output level during the reproducing operation. A control signal for switching stereo / monaural is supplied to the system controller 19 from a control signal output terminal described later. System controller 19
The feed control operation of the feed motor 21 when a control signal for stereo / monaural switching is supplied will be described later.

The input section 36 is provided on the front panel of the apparatus main body, and has a power key for turning on / off the power of the apparatus, a reproduction key for starting a reproducing operation, and a recording for starting a recording operation. It includes a plurality of operation keys such as a key, a stop key for stopping recording and reproducing operations, and a key for performing access and the like.

The display unit 37 is provided on the front panel of the main body of the apparatus and uses a display element such as a liquid crystal display or a fluorescent display tube. A display control signal generated by the system controller 19 based on the data recorded in the catalog area of the magneto-optical disk 12 is supplied to the display unit 37. Based on this display control signal, the display unit 37 displays the total reproduction time of the magneto-optical disk 12, the reproduction elapsed time of the data or program being reproduced, the remaining time of the data or program being reproduced, the remaining recordable time, etc. The time information, the track number being reproduced or recorded, etc. are displayed. Further, when the title of the disc itself, the title information of each data or program, and the data relating to the recording date and time of the data or the program are recorded on the magneto-optical disc 12, it is selectively displayed on the display unit 37.

The structure of the disc loading mechanism of the recording and / or reproducing apparatus will be briefly described with reference to FIG. Chassis 90
The disc cartridge 11 is inserted into the disc holder 11, and a holder 91 for holding the inserted disc cartridge 11 is provided so as to be vertically movable. Below the chassis 90, the spindle motor 13 and the turntable 13 are provided.
a, an optical pickup 15 is arranged. Chassis 90
An optical pickup 15 is provided on the lower surface side of the magneto-optical disc 1.
A pair of guide members 92 and 93 for guiding the two in the radial direction are arranged in parallel with each other, and a feeding mechanism (not shown) for feeding the optical pickup 15 in the radial direction by the driving force from the feed motor 21 is provided. It is distributed. Therefore, the optical pickup 15 includes the pair of guide members 92, 9
3 is fed in the radial direction of the magneto-optical disk 12 by the feed mechanism by the driving force from the feed motor 21. The magnetic head 28 is arranged above the chassis 90 so as to face the optical pickup 15. The magnetic head 29 is attached to the tip side of the arm 96,
When the magnetic head 28 is rotated, the magnetic head 28 comes close to or comes into contact with the magneto-optical disk 12 of the disk cartridge 11 from the notch on the upper surface of the holder 91.
That is, it moves between the first position and the upper position separated from the holder 91, that is, the second position. FIG. 2 shows a magnetic head 2
8 is in the second position.

The arm 96 is rotated by the cam mechanism 94 driven by the loading motor 14 so that the base end side 95 of the arm 96 is rotated. The base end side of the arm 96 is
The optical pickup 15 and the arm 96 are connected to one end of the optical pickup 15 so that the optical pickup 15 and the arm 96 have a U-shaped cross section. Disk cartridge 11 in holder 91
When the insertion of the holder is completed, a link mechanism (not shown) or a drive mechanism of the holder 91 operates to lower the holder 91.
When the holder 91 of the disc cartridge 11 is completely inserted, the shutter of the disc cartridge 11 is moved to the position where the pair of openings of the disc cartridge 11 are opened.
The magneto-optical disk 12 housed in the disk cartridge 11 is placed on the turntable 13a, and the optical pickup 15 and the magneto-optical disk 12 face each other. In this state, as will be described later, the spindle motor 13 is activated, the magneto-optical disk 13 is rotated, the TOC data is read from the magneto-optical disk 12, and is stored in the dedicated area of the system controller 19 or the memory 31. . At this time, the magnetic head 28 is held at the second position, that is, the position above the holder 91, as shown in FIG. When the recording and / or reproducing apparatus is switched to the recording operation based on the input of the input unit 36, the loading motor 14 is driven, the arm 96 is rotated, and the magnetic head 28 is moved to the recording position.

Next, the control configuration of the sled feed motor 21 (that is, the configuration of a part of the servo control circuit 18 and the drive circuit 20) will be described with reference to FIG. In FIG. 3, the input terminal 41 is supplied with the tracking error signal generated by the RF amplifier 16. The tracking error signal is supplied to the tracking amplifier 44 via the amplifier 42 and the switch 43, and the output of the tracking amplifier 44 is supplied to the integrating circuit 51 to be integrated. Integrating circuit 51
Is supplied to one fixed contact of the changeover switch 52 as a motor control signal.

The output signal of the amplifier 42 is supplied to the differentiating circuit 53 via the switch 43. The output waveform of the differentiating circuit 53 is supplied to the servo circuit 54 to generate a control signal for performing servo control based on the output waveform of the differentiating circuit 53, and the generated control signal is applied to the other fixed contact of the changeover switch 52. Supply.

The control signal obtained at the movable contact of the changeover switch 52 is supplied to the power amplifier 56 via the thread amplifier 55.
And the thread feed motor 21 is rotated by the output of the power amplifier 56.

The changeover switch 52 is changed over under the control of the system controller 19. The switch 52 is switched so that the movable contact is connected to the servo circuit 54 side when data is recorded on the magneto-optical disk 12, and the movable contact is integrated circuit when the recording operation such as reproduction is performed in other states. It is switched based on a control signal from the system controller 19 so as to be connected to the 51 side.

Based on the driving state of the power amplifier 56, the external phase compensation circuit 57 performs phase compensation.

As described above, when the changeover switch 52 is connected to the integrating circuit 51 side when the magneto-optical disk 12 is reproduced, the feed motor 21 is controlled based on the output of the integrating circuit 51. At this time, the feed motor 21 is rotationally driven at a relatively high speed. According to the feeding operation of the optical pickup 15 by the feed motor 21 during the reproduction, the time required to move the optical pickup 15 from the innermost peripheral position to the outermost peripheral position of the magneto-optical disk 12 is, for example, about 2
Seconds.

During recording of data on the magneto-optical disk 12, the changeover switch 52 is connected to the servo circuit 54 side by the control signal from the system controller 19 so that the servo circuit 54 corresponding to the cycle of the pulse waveform output from the differentiating circuit 53. The control signal is supplied to the feed motor 21. At this time, the feed motor 21 is rotationally driven at a speed of about 1/3 of that of the servo circuit 54. According to the feeding operation of the optical pickup 15 by the feeding motor 21 at the time of recording,
The time required to move the optical pickup 15 from the innermost track to the outermost track of the magneto-optical disk 12 is
For example, it takes about 6 seconds. As a matter of course, the same movement time is obtained when the outermost track of the magneto-optical disk 12 is moved to the innermost track.

However, the feed motor 21 is rotationally driven at a speed of about ⅓ at the time of reproduction, when recording a signal of two channels such as a stereo signal, and when recording a signal of a monaural signal. When recording a signal of one channel, the processing in the servo circuit 54 at the time of recording is about 1 more.
The feed motor 21 is rotationally driven at a speed of / 2, and as a result, the feed motor 21 is rotationally driven at a speed of about 1/6 during reproduction. When the feed motor 21 is rotationally driven at the speed of about ⅙, the time required to move the optical pickup 15 from the innermost track to the outermost track of the magneto-optical disk 12 is, for example, about 12 seconds. The servo circuit 54 is supplied with a control signal based on the recording channel from the disk controller 19 whether one-channel signal is recorded or two-channel signal is recorded.

The tracking control of the objective lens 15a is performed based on the output signal from the tracking amplifier 44. That is, the output of the tracking amplifier 44 is supplied to the power amplifier 45. The output signal from the power amplifier 45 is supplied to the tracking coil 46 of the actuator of the optical pickup 15, and the objective lens 15a is driven in the tracking direction. In this case, the external phase compensation circuit 47 performs phase compensation based on the driving state of the power amplifier 45.

Next, the configuration of the audio signal input section of this apparatus will be described with reference to FIGS. As shown in FIG. 5, the device according to the embodiment has a built-in microphone and a jack 70 to which an external microphone is connected. In the device according to the embodiment, in addition to the audio signal from the device connected to the device, the microphone 6
The audio signal picked up by 1 can be recorded, and the audio signal picked up by an external microphone (not shown) connected to the microphone jack 70 can be recorded. In FIG. 5, reference numeral 100 denotes the entire recording / reproducing apparatus,
The reproducing device 100 includes the insertion portion 1 of the disc cartridge 11.
With 01. The disc cartridge 11 inserted from the insertion portion 101 is inserted into the holder 91 shown in FIG. 2, and the magneto-optical disc 11 is placed on the turntable 13a by lowering the holder 91 as described above.

The built-in microphone 61 is a monaural microphone, and the jack 70 has a structure that can be connected to either a stereo microphone or a monaural microphone as an external microphone. FIG. 4 shows a specific configuration of the microphone input section. First, the circuit configuration around the built-in microphone 61 will be described. A terminal from which the power supply voltage + B is obtained is connected to one end of the built-in microphone 61 via resistors R1, R3 and R4, and the other end of the microphone 61 is connected. Ground. Then, the capacitors C1, C2, C3 and the resistor R
As shown in FIG. 4, 2 are connected in parallel to the locations facing these circuits. A series circuit of a condenser C4, resistors R5 and R6 is connected in parallel with the microphone 61,
A capacitor C5 is connected in parallel with the resistor R6.
Microphone 6 from the midpoint of connection between resistors R5 and R6
The audio signal output by 1 is taken out, and this audio signal is supplied to the contacts 74 and 75 of the jack 70 via the capacitor C6.

In this case, the capacitor C4 functions as a low level cut capacitor of the microphone 61, and the capacitor C5 functions as a high level cut capacitor of the microphone 61. Further, the sound pickup level of the microphone 61 is adjusted by the resistance ratio of the resistors R5 and R6.

The signals supplied to the contacts 74 and 75 of the jack 70 are supplied to the capacitors C through the terminals 72 and 73, respectively.
It is supplied to the input amplifiers 62L and 62R via 7 and C8, respectively. Output signals from the input amplifiers 62L and 62R are input through the buffer amplifiers 63L and 63R to the input terminal 65L,
It is supplied to 65R. Output signals from the input terminals 65L and 65R are supplied to the input terminal 35 shown in FIG.

The midpoint of connection between the resistor R2 and the capacitor C2 is connected to the terminal portion 7 of the jack 70 via the resistors R7 and R8.
The power supply voltage + B is supplied to an external microphone connected to the jacks 70 and 70. Jack 70
The terminal portion 71 of the plurality of terminal portions is grounded.

In the state where the external microphone is not connected to the jack 70 (state of FIG. 4), the contact point 74 contacts the terminal portion 72 and the contact point 75 contacts the terminal portion 73. When the external microphone is connected to the jack 70, that is, when the plug of the external microphone is inserted into the jack, the contacts 74 and 75 are separated from the terminals 72 and 73.

When the plug of the external microphone is inserted into the jack 70, the audio signal of the left channel is supplied from the plug side of the external microphone to the terminal portion 72, and the audio signal of the right channel is supplied from the plug side of the external microphone to the terminal 73. Supplied. Further, when the external microphone is not connected to the jack 70, as described above, the audio signal of one channel as the output signal from the microphone 61 built in the terminal portions 72 and 73 is the contact point 74,
It is supplied via 75.

The two-channel audio signals from the external microphones supplied to the terminal portions 72 and 73 are supplied to the input amplifiers 62L and 62R via the capacitors C7 and C8, and further to the next stage of the input amplifiers 62L and 62R. It is supplied to the left and right two-channel audio signal input terminals 65L and 65R via the connected buffer-up 63L and 63R. When the built-in microphone 61 is used, one-channel signal, that is, the same signal is supplied to the input terminals 65L and 65R as described above. Input terminals 65L, 6
The 2-channel audio signal supplied to 5R is supplied to the input terminal 35 shown in FIG.

Here, some of the outputs of the buffer amplifiers 63L and 63R are supplied to the AGC circuit (automatic gain adjustment circuit) 64, and the output of the AGC circuit 64 is used as the output of the buffer amplifier 6.
The input gain of the buffer amplifiers 63L and 63R is adjusted by feeding back to the input stages of 3L and 63R.

The microphone input section is provided with a stereo / monaural selector switch 80. By operating the changeover switch 80, the audio signal input to the input terminal 35 shown in FIG. 1 can be switched between a 2-channel stereo audio signal and a 1-channel monaural audio signal. That is, the stereo / monaural selector switch 80 is
With this manually switchable switch, the first switching unit 81
And a second switching section 82, the contact pieces 83, 84 move in conjunction with the switching operation, and the switching sections 81, 82 interlock and switch.

Set the switch 80 to the monaural side, that is, the contact piece 8
When the switches 3 and 84 are switched so as to connect the contacts 81a and 81M, the first switching unit 81 causes the input amplifier 62L,
62R is output, and the audio signals are mixed. That is,
The output signal of the input amplifier 62L is supplied to the contact 81a, and the output signal of the input amplifier 62R is supplied to the contact 81M. At this time, since both contacts 81a and 81M are connected by the contact piece 83, the left and right two channels are connected. The audio signals are mixed and a monaural signal is output from the input terminals 65L and 65R. When the switch 80 is switched to the stereo side, the contact piece 83 is not connected to the contact 81a and the contact 8
By connecting with 1S, the left and right audio signals are not mixed.

The second switching section 82 switches the control signal. That is, the contact 82a is at the ground potential, and the contact piece 83 is switched so as to connect between the contacts 81a and 81M, and at the same time, the contact piece 84 is contacted.
The contact 82M is connected to the control signal output terminal 66 because it is switched to connect between a and 82M.
A control signal is supplied to the system controller 19 via this terminal 66. Then, when the switch 80 is switched to the monaural side, the contacts 82a and 82M contact the contact piece 8a.
4 and the low level signal is output from the terminal 66 as a control signal. When the switch 80 is switched to the stereo side, the contact 82a and the unconnected contact 82S are connected by the contact piece 84, and a high level signal is output from the terminal 66 as a control signal.

The system controller 19 records a signal of two channels in the recording mode for recording on the magneto-optical disk 12 based on the control signal indicating the recording mode supplied from the terminal 66, that is, a signal for recording a stereo signal and a signal for one channel. That is, it is determined which mode of recording the monaural signal is set. When the control signal supplied to the terminal 66 and indicating the recording mode is a high-level signal, the system controller 19 determines that it is a mode for recording a stereo signal, and the control signal supplied to the terminal 66 and indicating the recording mode. Is a low level signal, it is determined that the mode is a mode for recording a monaural signal.

However, when the built-in microphone 61 is used without connecting an external microphone plug to the jack 70, a low level signal is always output from the terminal 66 regardless of the state of the switch 80. That is, the resistors R9 and R10 are connected in series to the capacitor C6, which is a portion to which the audio signal from the built-in microphone 61 is supplied, and are grounded via the resistor R10.
The connection midpoint of the resistors R9 and R10 is connected to the base of an NPN type transistor Q1, the emitter of this transistor Q1 is grounded, and the collector of the transistor Q1 is connected to the terminal 66.

With such a connection, when the audio signal from the built-in microphone 61 is obtained, that is, when the plug is not connected to the jack 70, the resistor R
Power supply voltage + B supplied from 7, R8 is jack 70
Is supplied to the base side of the transistor Q1 via the transistor Q1, the transistor Q1 is turned on, and a control signal of a low level signal is obtained at the terminal 66. Also, Jack 7
When the plug is connected to 0, as described above, the state of the control signal changes depending on the state of the switch 80.

On the system controller 19 side, it is determined whether the recording mode is stereo recording of 2 channels or mono recording of 1 channel according to the state of the control signal supplied through the terminal 66, and the corresponding state is determined. To control.

The recording operation of the recording and / or reproducing apparatus configured as above will be described. When the recording key of the input section 36 is operated, the system controller 19 issues a control signal to start the operation of each section of the recording / reproducing apparatus. After the operations such as focusing servo and tracking servo have started, an input signal input from the input terminal 35, for example, an analog audio signal is input to the A / D converter 36.
And is converted into a 16-bit digital signal and digital audio signal. The digital audio signal is supplied to the compression / expansion device 32, and after being compressed into a data amount of about 1/5, it is temporarily stored in the memory 31 via the memory controller 30. The digital data once stored in the memory 31 is read by the memory controller 30 and supplied to the encoder / decoder 17. The digital data supplied to the encoder / decoder 17 is subjected to EFM processing and error detection / correction coding processing and converted into recording data.

The recording data is supplied to the magnetic head 28 via the head drive circuit 27. The magnetic head 28 applies a vertical magnetic field, which is modulated by a drive signal based on recording data, to the magneto-optical disk 12. At the same time, the magneto-optical disk 12
A light beam having an output level required for recording is emitted from the optical pickup 15 from the disk substrate side. As a result, the recording film of the magneto-optical disk 12 is heated to the Curie temperature or higher by the light beam emitted from the optical pickup 15, and at the same time, the modulated vertical magnetic field is supplied from the magnetic head 28. After that, the temperature of the recording film falls below the Curie temperature due to the relative movement of the light beam and the magneto-optical disk 12. At this time, the magnetization direction of the recording film is changed and determined according to the direction of the vertical magnetic field applied to the magneto-optical disk 12 by the magnetic head 28, and the data is recorded on the magneto-optical disk 12. In this way, the data for about 2 seconds (1 cluster) of the original analog audio signal is recorded on the magneto-optical disk 12 in about 0.4 seconds. Data is recorded on the magneto-optical disk 12 intermittently in units of one cluster.

During this recording operation, when recording the stereo signal input from the external microphone connected to the jack 70, the changeover switch 80 is switched to the stereo side. As a result, a high level signal is output from the terminal 66 as a control signal indicating the recording mode. The system controller 19 has a terminal 6
When a high level signal is supplied from 6, it is determined that the stereo signal recording mode is set. As a result, the loading motor 14 loads the magnetic head 28 to a position close to or in contact with the magneto-optical disk 12 based on the drive control signal from the loading motor control circuit 22 generated based on the control signal from the system controller 19. The motor 14 is moved from the second position to the first position at a speed higher than the moving speed of the magnetic head 28 when recording a monaural signal. At the same time, the system controller 19 switches the switch 52 to the servo circuit 54 side. As a result, the feed motor 21
Is, for example, about 1 / the rotation speed of the feed motor 21 during reproduction.
The rotation of the feed motor 21 is controlled so as to have a rotation speed of 3, and the optical pickup 15 and the magnetic head 28 are moved in the radial direction of the magneto-optical disk 12 by the feed mechanism using the feed motor 21 as a drive source.

On the other hand, a monaural signal output from the microphone 61 built into the apparatus body or the jack 70
If a monaural signal is recorded based on the output signal from the microphone connected to, or if a recording mode for recording a monaural signal by switching the selector switch 80 to the monaural side is set, the system controller 19 A low level signal is supplied from the terminal 66 as a control signal indicating the recording mode. The system controller 19 determines that the recording mode for recording a monaural signal is set based on the low-level signal supplied from the terminal 66. As a result, the loading motor 14 receives the magnetic head 28 based on the drive control signal from the loading motor control circuit 22 generated based on the control signal from the system controller 19.
Is moved to a position close to or in contact with the magneto-optical disk 12 from the second position to the first position at a speed slower than the moving speed of the magnetic head 28 when recording a stereo signal. At the same time, the system controller 19 switches the switch 52 to the servo circuit 54 side to control the rotation of the feed motor 21 so that the rotation speed becomes, for example, about 1/2 of that at the time of recording the stereo signal, as described above. Then, the optical pickup 15 and the magnetic head 28 are moved in the radial direction of the magneto-optical disk 12.
As described above, when recording a monaural signal using the microphone 61 built into the apparatus body, even if the changeover switch 80 is switched to the stereo side, the monaural signal is automatically generated. Switch to recording mode.

In this way, during recording, the moving speed of the optical pickup 15 and the magnetic head 28 in the radial direction of the magneto-optical disk 12 by the feed motor 21 is made slower than that at the time of reproduction, so that the feed motor 21 during recording operation is It is possible to control noise generated by the feed mechanism using the feed motor 21 as a drive source, and particularly when recording an input signal from the microphone on the magneto-optical disk, noise generated by the feed motor and the feed mechanism accompanying the recording operation. Can be reduced and a signal with less noise can be recorded on the magneto-optical disk. Further, when recording the output signal from the microphone built in the apparatus on the magneto-optical disk 12, the feed motor 21 and the loading motor 1
By making the rotation speed of 4 slower than the rotation speed at the time of recording with a stereo signal, noise generated by these motors 21 and 14 in a microphone built in the device, a mechanism driven by these motors 21 and 14 Since the noise generated in 1 can be reduced, a better signal can be recorded on the magneto-optical disk 12.

During the recording operation, the system controller 1 detects that a track jump has occurred due to vibration or the like.
If it is determined by the magnetic head 2, the output level of the light beam emitted from the optical pickup 15 is immediately lowered to an output level at which recording is not possible, and at the same time, the magnetic head 2
The supply of recording data to No. 8 is stopped, or the reading of digital data from the memory 31 is stopped. The input signal input from the input terminal 35 is stored in the memory 31 until the operation of the optical beam emitted from the optical pickup 15 to access the position before the track jump again occurs.
Is stored in When the access of the light beam is completed, the output level of the light beam emitted from the optical pickup 15 is raised to the output level necessary for recording, the supply of the recording data to the magnetic head 28 is restarted, and the recording operation is started. .

Regarding which part of the data recording area of the magneto-optical disk 12 to start recording, the input section 3
The system controller 19 sets and controls the data on the basis of the data input by the user 6 or the data obtained by reading the inventory area stored in the storage area of the system controller 19 or the dedicated storage area of the memory 31. Further, during the recording operation, the data read from the inventory area and held in the system controller 19 or the memory 31 is changed at any time according to the recording operation. When the recording operation of data corresponding to all input signals is completed or before the stop key of the input unit 36 is operated and the disk cartridge 11 is ejected from the recording and / or reproducing apparatus, the optical pickup 15 and the magnetic head 28 to the catalog area to access the magneto-optical disk 12
The data recorded in the catalog area is updated, and after the update operation is completed, the disk cartridge 11 is ejected from the recording / reproducing apparatus.

Next, the reproducing operation of the recording and / or reproducing apparatus will be described. When the disc cartridge 11 is loaded in the recording and / or reproducing apparatus, the spindle motor 13
Following the start-up operation of the optical disk, the focusing servo, and the pull-in operation of the tracking servo, the optical pickup 15 is sent in the inner peripheral direction of the magneto-optical disk 12 to move the magneto-optical disk 1.
The second catalog area is read. At this time, the output level of the light beam emitted from the optical pickup 15 to the magneto-optical disk 12 is set so that data cannot be recorded, in other words, the temperature of the recording film cannot be heated to the Curie temperature. Has been done. The data recorded in the inventory area read by the optical pickup 15 is stored in the storage area in the system controller 19 or the dedicated storage area in the memory 31. Next, the optical pickup 15 is sent to the data recording area of the magneto-optical disk 12 to read the data recorded in the data recording area.

Based on an input signal input from the input section 36, the system controller 19 determines which part of the data recording area to read the data recorded in and in what order.
Controlled by. The output signal from the photodetector of the optical pickup 15 is supplied to the RF amplifier 16 to generate signals such as a focusing error signal and a tracking error signal as described above, and also an RF signal. One of the focusing error signal, the tracking error signal, the RF signal, and the sync signal extracted from the address data is the servo control circuit 18.
Then, each signal of the focusing servo signal, the tracking servo signal, the spindle servo signal, and the feed signal is generated by the servo control circuit 18.

Focusing servo and tracking servo are performed by supplying the focusing servo signal and the tracking servo signal to the actuator of the optical pickup 15. The spindle servo is performed by supplying the spindle servo signal to the spindle motor 13. The RF signal is supplied to the EFM and CIRC encoder / decoder and subjected to EFM demodulation and error correction processing. The address data decoded by the address decoder 26 is supplied to the system controller via the encoder / decoder 17. The system controller 19 controls the reproducing position of the optical pickup 15 in the radial direction of the magneto-optical disk 12 based on the supplied address information. The system controller 19 manages the reproduction position on the recording track of the magneto-optical disk 12 scanned by the optical pickup 15 using the reproduced address information. Data is read from the magneto-optical disk 12 intermittently in units of one cluster.

The digital data output from the encoder / decoder 17 is temporarily stored in the memory 31 via the memory controller 19. If there is no track jump in which the playback position moves due to vibration or the like during the playback operation, the memory controller 19 will perform 1.41 Mbit /
The digital data is written into the memory 31 at a transfer rate of seconds, and the digital data written in the memory 31 is read out from the memory 31 at a transfer rate of 0.3 Mbit / second. The memory controller 30 uses the memory 3 to prevent the data stored in the memory 31 from falling below a predetermined amount.
The digital data write control to 1 is performed. When the amount of data in the memory 31 is a predetermined amount or more, the reading of data from the magneto-optical disk 12 is stopped, that is, the so-called pause state. When the system controller 19 determines that the track jump has occurred during the reproducing operation, the memory controller 19 stops the writing of the digital data output from the encoder / decoder 17 in the memory 31, and moves the memory 31 to the compression / expansion unit 32. The memory 31 is controlled so that only the digital data is transferred. Then, from the optical pickup 15 to the magneto-optical disk 1
After the access to the position of the light beam irradiated on 2, that is, the position where the reproducing position is before the track jump occurs,
The writing operation of the digital data output from the encoder / decoder 17 to the memory 31 is restarted. The digital data stored in the memory 31 is read out, decoded, and output from the output terminal 34 until the operation of correcting the reproduction position is completed.

The digital data read from the memory 31 is supplied to the compression / expansion device 32, and the digital data is expanded. The digital audio signal output from the compression / expansion unit 32 is supplied to the D / A converter 33, converted into an analog audio signal, and output from the output terminal 34 to an external circuit such as an external amplifier circuit.

In this reproducing operation, the memory controller 30 stores in the memory 31 during normal reproducing operation such that the memory 31 stores more data than the data amount corresponding to the minimum necessary time required for correcting the reproducing position. 31 write control is performed. The memory controller 30 causes the system controller 19 to generate a control signal when the amount of data in the memory 31 becomes less than or equal to a predetermined amount, and the optical pickup 1
5 intermittently reads the data from the magneto-optical disk 12, and writes the digital data from the encoder / decoder 17 in the memory 31. If a DRAM having a storage capacity of 1 Mbit is used, the memory 31
The time required to write a full amount of digital data is about 0.9 seconds, and this digital data corresponds to an analog signal of about 3 seconds. In other words, when the digital data is stored in the memory 31 full, an analog signal as a reproduction signal is output for about 3 seconds even if the output signal is not supplied from the optical pickup 15 that has read the magneto-optical disk 12 due to vibration or the like. The output can be continued from the terminal 34. In this embodiment, D having a storage capacity of 4 Mbits is used.
Since the RAM is used as the memory 31, the reproduction signal can be continuously output from the output terminal 34 for about 12 seconds. In the meantime, the reproduction position on the disc by the optical pickup 15 is accessed again to the position before the track jump occurs,
By restarting the reading of data from the magneto-optical disk 12, it is possible to prevent the analog signal as the reproduction signal from being interrupted from the output terminal 34. In the above description, a case where a stereo signal is recorded on the magneto-optical disk 12 is described as an example. Therefore, when a monaural signal is recorded on the magneto-optical disk 12, a monaural signal that is about 20 seconds, which is twice the stereo signal, is recorded. Can be stored in the memory 31.

In the reproducing operation, when reproducing the data recorded on the magneto-optical disk 12, it is determined whether the signal recorded on the magneto-optical disk 12 is a stereo signal or a monaural signal. System controller 19 switches switch 52 to integration circuit 51
Switch to the side. As a result, the feed motor 21 is rotationally controlled at a higher speed than the rotational speeds of the optical pickup 15 and the magnetic head 28 at the time of recording the above-mentioned stereo signal,
The optical pickup 15 and the magnetic head 28 are sent in the radial direction of the magneto-optical disk 12. At this time, since the loading motor 14 is not driven, the magnetic head 28 moves to the second
It is located in the position.

After the reproduction operation of all the data recorded on the magneto-optical disk 12 is completed, or when the stop key of the input unit 36 is operated, the reproduction operation is stopped and the disk cartridge 11 is transferred from the recording / reproducing apparatus. Is discharged.

According to the disc recording and / or reproducing apparatus of the present example, the disc recording and / or reproducing apparatus is constructed and operated as described above,
Even if the optical pickup 15 moves in the radial direction of the magneto-optical disk during recording, the moving speed at this time becomes about 1/3 slower at the time of recording a stereo signal than at the time of reproducing, and the optical pickup 15 and The noise generated by the radial feed of the magnetic head 28 connected to the pickup 15 is reduced accordingly. This is because the noise generated from parts such as the motor and the feed mechanism is almost proportional to the energy applied to these parts. That is, in the case of the recording and / or reproducing apparatus like this example, as described with reference to FIG. 6, there is a possibility that the radial pickup of the optical pickup and the magnetic head is frequently performed during recording. But,
Even if this radial feeding is performed during recording, the noise generated is reduced. Therefore, noise picked up by the microphone is reduced, and noise superimposed on the audio signal recorded on the magneto-optical disk is reduced. In particular, when recording is performed using the built-in microphone 61, since the position of the feed mechanism section in the apparatus and the microphone are close to each other, the effect of reducing the noise level is high.

In this case, the speed of the feed by the feed motor is set to the speed that can be temporarily interrupted from the recording of the data with the capacity that can be stored in the memory 31, so the moving speed should be slowed down. Recording without interruption,
Input voice can be recorded continuously. That is, in the case of the present example, when performing 2-channel stereo recording, data of about 10 seconds can be stored in the memory 31, but the optical pickup 15 moves from the innermost track to the outermost track of the disc. The memory 3 was used because it took about 6 seconds, which is slightly shorter than the 10 seconds that can be stored.
The feed is performed by the low-speed feed motor 21 that effectively utilizes the capacity of 1, that is, the radial feed with low noise is performed.

Further, in the case of this example, when recording a monaural signal, the fact that the time of the data that can be stored in the memory 31 is approximately doubled is utilized, and the feed speed by the feed motor is further set to approximately 1 Since the speed is slowed down to 1/2, it is possible to further reduce noise due to the feeding device using the feed motor 21.

Since the thread feed is performed at high speed during reproduction as in the conventional case, even if the track to be reproduced is changed by the feed motor 21 during reproduction, the data temporarily stored in the memory 31 is changed. Even if the amount is sufficiently secured and the reproduction from the disk cannot be temporarily performed due to the vibration applied to the device from the outside, the continuous reproduction using the data of the memory 31 can be performed.

Further, in the case of the present example, the speed at which the magnetic head 28 is moved at the start of recording a 1-channel monaural signal is sufficiently slower than the speed at which it is moved at the start of 2-channel stereo signal recording. By doing so, it is possible to reduce the noise generated by the movement of the magnetic head 28 during recording of the monaural signal, and reduce the noise picked up by the microphone at the start of recording. As for the noise in this case, the generation of the noise changes in proportion to the driving speed as in the case of the movement of the feed motor described above, so that the generation amount of the noise can be significantly reduced.
When recording a 1-channel monaural signal, the time for storing data in the memory 31 is approximately doubled. Therefore, even if it takes time for the magnetic head 28 to move to the disk surface, a recording start instruction is issued. Even if it takes time from when the memory 31 starts storing the audio signal from the microphone to actually start recording on the magneto-optical disk 12, recording can be performed without any problem.

The time required for the feed operation by the feed motor and the movement of the magnetic head in the above embodiment is an example, and the drive speed may be changed at different ratios. However, it is necessary to complete the feeding operation by the feed motor and the movement of the magnetic head within the time that can be stored in the memory 31 of the recording data, and actually within a time that is slightly shorter than the time that can be stored with some margin. There is.

Further, although the built-in microphone is a monaural microphone in the above-mentioned embodiment, a stereo microphone for obtaining 2-channel audio signals may be built-in.

Further, in the above-mentioned embodiments, the case where the invention is applied to the recording and / or reproducing apparatus using the magneto-optical disk has been described as an example, but the recording medium is a recordable optical disk, for example, an optical disk. Or, of course, it can be applied to a reproducing apparatus.

[0095]

According to the present invention, when the signal based on the output signal from the microphone is recorded on the magneto-optical disk serving as the disk-shaped optical recording medium, the ascending / descending speed of the magnetic field generator is controlled to be slow. As a result, noise or the like generated on the device side during recording can be reduced, so that data can be recorded favorably on the recording medium.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a recording / reproducing unit according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an internal mechanism of the apparatus according to the embodiment.

FIG. 3 is a configuration diagram showing a drive circuit of a sled motor according to an embodiment.

FIG. 4 is a configuration diagram showing a microphone input unit according to an embodiment.

FIG. 5 is a perspective view showing the external appearance of an apparatus according to an embodiment.

FIG. 6 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 control unit 21 feed motor 25 frequency generator 61 built-in microphone 70 microphone jack 80 stereo / monaural selector switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G11B 21/08 B 9058-5D

Claims (7)

[Claims] 1. An optical pickup for irradiating a light beam of a magneto-optical disk, a magnetic field generating means for applying a vertical magnetic field to the magneto-optical disk to record a signal on the magneto-optical disk together with the optical pickup, and the magnetic field generating means. Elevating means for raising and lowering a first position for recording information with respect to the magneto-optical disk together with the optical pickup and a second position above the first position and separated from the magneto-optical disk. When controlling the recording operation by the optical pickup and the magnetic field generating means, and controlling the operation of the elevating means, and recording the output signal from the microphone on the magneto-optical disk by the optical pickup and the magnetic field generating means. Of the ascending / descending means so that the moving speed of the magnetic field generating means from the first position to the second position becomes slower. A recording device for a magneto-optical disk, comprising: a control means for controlling the descending means. 2. The ascending / descending speed of the magnetic field generating means by the ascending / descending means when the optical pickup and the magnetic field generating means perform recording on the magneto-optical disk based on an output signal from a microphone, The elevating means is controlled so as to be slower than the ascending / descending speed of the magnetic field generating means by the elevating means when the signal supplied from the signal source is recorded on the magneto-optical disk by the optical pickup and the magnetic field generating means. The magneto-optical disk recording apparatus according to claim 1, wherein 3. The magneto-optical disk recording apparatus according to claim 1, wherein the magneto-optical disk recording apparatus further includes a microphone attached to the apparatus body. 4. The device further comprises a connection terminal to which a microphone is connected, and the control means has a microphone connected to the connection terminal and is based on an input signal from the microphone connected to the connection terminal. The ascending / descending speed of the magnetic field generating means by the ascending / descending means when recording is performed by the optical pickup and the magnetic field generating means causes a signal supplied from another signal source to the magneto-optical disk by the optical pickup and the magnetic field generating means. 2. The magneto-optical disk recording apparatus according to claim 1, wherein the elevating means is controlled so as to be slower than the elevating speed of the magnetic field generating means by the elevating means when recording. 5. The control means includes the magnetic field generation means,
2. The elevating means is driven and controlled to move to the first position only when a signal is recorded on the magneto-optical disk by the optical pickup and the magnetic field generating means. Magneto-optical disk recording device. 6. The apparatus further comprises switching means for switching between a monaural signal recording mode and a stereo signal recording mode, and the control means, when the monaural signal recording mode is set by the switching means, The ascending / descending speed of the magnetic field generating means by the ascending / descending means is made slower than the ascending / descending speed of the magnetic field generating means by the ascending / descending means during a stereo signal recording operation by the optical pickup and the magnetic field generating means. Item 1. A recording device for a magneto-optical disk according to item 1. 7. The control means controls the ascending / descending speed of the magnetic field generating means by the ascending / descending means during the recording operation of the monaural signal on the recording medium by the optical pickup and the magnetic field generating means. 7. The recording apparatus for a magneto-optical disk according to claim 6, wherein the ascending / descending speed of said magnetic field generating means by said ascending / descending means is slowed by about 1/2 or more during the operation of recording a stereo signal.