JPH05101480A - Magneto-optical disk recording device and reproducing device - Google Patents

Abstract

PURPOSE:To eliminate a compress encode processing time and to speed up a dubbing recording by bypass recording a compress encoder emplying a switch means which is controlled depending on the recording data being compressed or expanded data. CONSTITUTION:Recording data are inputted from a first external input terminal IN1, compressed by a compress encoder 9 through an A/D converter 10 and recorded by DRAM 8. The recorded data read out from it are modulated by an EFM encoder and are inputted to a changeover switch 6. At that time, the switch 6 is connected to one of the terminal sides by a changeover control signal (b) from a system controller 17. The controller 17 recognizes the data to be from the terminal IN1 by the input from an input device 18, gives the signal (b) to the switch 6, sends the data to a recorder 5 and drives an optical pickup 4. The pickup 4 conjunction with a magnetic head 3 records the recording data to a magneto-optical disk 1.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an MD (mini disc).
The present invention relates to a recording device, a reproducing device, and a recording / reproducing device for a magneto-optical disk, and more particularly to a device suitable for dubbing record data to / from another digital signal recording medium.

[0002]

2. Description of the Related Art Recently, CDs (Compact Disks), DATs (Digital Audio Tapes), etc. are known as recording media for recording recording information in a digital signal format. When dubbing digital data between these recording media, for example, the external output terminal of the CD player and the input terminal of the DAT deck are connected by a connecting cable, and the digital signal reproduced by the CD player is directly used as it is.
Dubbing is possible by transferring to the T deck. Conversely, when dubbing from DAT to CD, similarly, the reproduced digital signal may be directly transferred to the CD player. That is, both CD and DAT are signal digital signals, and their signal formats are also the same.

[0003]

However, recently,
An MD (mini disk) and its recording / reproducing apparatus have been developed as a magneto-optical disk having a smaller diameter (64 mm in diameter) than a CD, a reproduction time equivalent to that of the CD, and capable of writing and rewriting information (see "Nikkei Electronics [Nikkei BP] No. 528 (1991.5.27), pp. 106 to 1
Page 07 "and" Radio Technology [Radio Technology Co., Ltd.] (June 1991), pp. 9-12 ").

The problem here is that the signals recorded on the CD or DAT can be directly recorded on the MD, or conversely, the recording information of the MD can be directly recorded on the CD or DAT for dubbing. The point is that you can't. The reason is that the MD uses a compression technique for compressing the recording signal to 1/5 or the like in order to increase the recording capacity.

Therefore, a CD or D writable from the MD
When dubbing to AT, the playback signal of MD is temporarily
It is necessary to decompress (for example, 5 times) via a compression decoder to restore the writable CD or DAT signal format, and when dubbing from CD or DAT to MD, CD
It is necessary to temporarily compress the reproduction signal of DAT or DAT via the compression encoder.

When MD players are connected to each other for dubbing, the player on the reproducing side decompresses the compressed data in the MD, sends the compressed data to the MD player on the recording side, and compresses it again on the MD player on the recording side. Then, a complicated process of recording is required.

The compression processing by these compression encoders and the decompression processing by the compression decoder naturally need time for these processings. Therefore, conventionally, there has been a limitation in speeding up the dubbing time.

An object of the present invention is to provide a magneto-optical disk recording apparatus and reproducing apparatus capable of speeding up dubbing between magneto-optical disks having compressed data.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 provides an external input terminal for inputting data to be recorded, and recording data input from this external input terminal. A compression encoder that compresses and outputs,
In a recording device for a magneto-optical disk, which includes a recording unit for recording compressed recording data on a writable magneto-optical disk, another system input terminal for inputting compressed recording data, the compression encoder and the recording unit. A switching means interposed between the recording unit and the recording unit for selectively supplying either the compressed recording data output from the compression encoder or the compressed recording data from the separate system input terminal to the recording unit; Means for outputting a switching control signal for selecting the input record data.

According to a second aspect of the present invention, the reproducing section for reproducing the compressed data recorded on the magneto-optical disk, the compression decoder for decoding and expanding the reproduced compressed data, and the expanded reproduced data to the outside. In a reproducing apparatus for a magneto-optical disk having an external output terminal for outputting, an external output terminal of a system different from the external output terminal, and the reproducing section interposed between the reproducing section and a compression decoder. Switching means for selectively outputting the compressed data output from the compression decoder or the external output terminal of the separate system, and a switching control signal for selecting the output destination of the compressed data to the switching means. And a control means for outputting.

The third aspect of the present invention comprises both the magneto-optical disk recording / reproducing apparatus according to the first aspect and the magneto-optical disk reproducing apparatus according to the second aspect.

[0012]

According to the first aspect of the present invention, when the compressed recording data is applied to the separate system input terminal, the switching means is switched by the switching control signal from the control means. The switching means sends the compressed recording data as it is to the reproducing section. When the uncompressed recording data is input to the external input terminal, the switching unit sends the recording data to the compression encoder.

According to the second aspect of the present invention, for example, when the recording device to which the reproduction data is transferred has a compression encoder and records the compressed data on the recording medium,
The reproducing device outputs the reproduced data as it is to the external output terminal of another system through the switching means. If not,
The reproduced data is sent to the compression decoder by the switching means.

According to the third aspect of the invention, the above operation can be performed in one device.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. Although FIG. 1 shows an example of a recording / reproducing apparatus using a magneto-optical disk 1 (mini disk) as a recording medium, the present invention can be applied to an apparatus having only a recording system and a reproducing system. Is.

In FIG. 1, each MD player 101 has two systems of input terminals and output terminals. That is, the first external input terminal IN ₁ and the first external output terminal O
UT ₁ is a terminal connected to a device for recording and reproducing normal digital recording signals such as a CD player 100 and a DAT deck, and the second external input terminal IN ₂ and the second external output terminal OUT ₂ are the same as those of an MD player. This is a terminal connected to a device for recording / reproducing a compressed digital signal. Since other configurations are different between the recording system and the reproducing system, each will be described below.

First, the recording system will be described. The uncompressed recording data is given to the first external input terminal IN ₁ , and the recording data is converted to A / D by the A / D converter 10.
The data is D-converted, compressed to ⅕ or the like by the compression encoder 9, and stored in the DRAM 8. The DRAM 8 is a memory that operates at a relatively high writing speed as compared to the reading speed, and acts as a memory when an external shock is applied to the MD player 101 (see Nikkei Electronics mentioned above). The recording data read from the DRAM 8 is E
EFM (Eight Fourteen Modul) by FM encoder 7.
ation) After being modulated, it is input to one terminal of the changeover switch 6. At this time, the changeover switch 6 is connected to one terminal side by the changeover control signal b from the system controller 17. System controller 17
Recognizes that the data to be recorded by the input from the input device 18 is the data input to the first external input terminal IN ₁ , and the switching control signal b corresponding to the mode is recognized.
Is given to the changeover switch 6. The recording data selected by the changeover switch 6 is given to the recording unit 5. The recording unit 5 sends recording data to the optical pickup 4 and drives the optical pickup 4. The optical pickup 4 cooperates with the magnetic head 3 to record the recording data on the magneto-optical disk 1.

Here, when the recording data is compressed in the compression encoder 9, processing time for compression decoding is required. On the other hand, the operation of reading data from the DRAM 8 is performed by batch reading a large amount of data.
Since the data is written to, the DRAM 8 waits for the end timing of the processing of the compression encoder 9. Therefore, if there is no data stored in the DRAM 8, there will be no data written to the magneto-optical disk 1.
The system controller 17 stops the rotation of the spindle motor 2 via the servo circuit 16. That is, the spindle motor 2 repeats rotation and stop (pause) in accordance with the amount of data stored in the DRAM 8 to perform intermittent rotation. As described above, the processing time of the compression encoder 9 when recording uncompressed recording data on the magneto-optical disk 1 and the irregular rotation of the spindle motor 2 caused by the processing time become a problem.

On the other hand, the compressed record data is given to the second external input terminal IN ₂ , and the compressed record data is directly sent to the changeover switch 6. At this time, the changeover switch 6 is changed over to the other terminal by the changeover control signal b from the system controller 17, and the compressed record data is directly given to the recording section 5. The recording unit 5 drives the optical pickup 4 and the magnetic head 3 based on the supplied compressed data, and the compressed data is recorded on the magneto-optical disk 1. In this way, the compressed recording data is given to the second external input terminal IN _2, and when recording this data, the A / D converter 10, the compression encoder 9, the DRA
Since the signal processing of the M8 and EFM encoder 7 is omitted and the data is directly recorded on the magneto-optical disk 1, high-speed recording processing is possible, and the normal CD player can be used without stopping the rotation of the spindle motor 2. It is possible to record under the control of the predetermined rotation speed as is performed.

During the above recording operation, the spindle motor 2 for rotating the magneto-optical disk 1 is driven by the spindle servo signal SS from the servo circuit 16, and the focus coil of the optical pickup 4 is driven by the focus servo signal FS.
The carriage motor and the tracking coil of the optical pickup 4 are controlled by the tracking servo signal TS, and the magnetic head 3 is controlled by the magnetic head servo signal HS. The servo circuit 16 is controlled by the servo control signal f from the system controller 17. In addition, the status display etc. necessary for each operation is displayed on the display device 1.
It is done through 9.

Next, the reproducing system will be described. When the compressed data in the magneto-optical disk 1 is transferred to a DAT deck or the like, the compressed recording data read from the magneto-optical disk 1 by the optical pickup 4 is reproduced by the reproducing unit 11.
It is sent to the changeover switch 12 as an RF signal. At this time, the changeover switch 12 is connected to one terminal by the changeover control signal e from the system controller 17, and the reproduced compressed data is transferred to the DFM via the EFM decoder 13.
It is temporarily stored in the RAM 8. Next, the reproduced compressed data read from the DRAM 8 is expanded (for example, 5 times) by the compression decoder 14, D / A converted by the D / A converter 15, and then output from the first external output terminal OUT ₁ .

Here, when the reproduction compressed data read from the DRAM 8 is decoded by the compression decoder 14,
The compression and decoding processing time is required, and only that time DR
The reading of data from the AM 8 is restricted, and the reproduction compression data read from the magneto-optical disk 1 is accumulated in the DRAM 8 every moment. As a result, the input reproduction compressed data will be stored in excess of the storage capacity of the DRAM 8. Therefore, in order to prevent this, the system controller 17
Stops the rotation of the spindle motor 2 via the servo circuit 16 and waits for the end of the processing of the compression decoder 14 in the pause state. In other words, the spindle motor 2 is DR
Rotate and stop (pause) according to the amount of data stored in AM8
Will be repeated. In this way, the magneto-optical disk 1
This causes a delay in the transfer speed when transferring the compressed data in the disk to a DAT deck or the like. On the other hand, the magneto-optical disk 1
When the compressed data inside is transferred to a device having a compression encoder or a compression decoder such as an MD player, the compressed recording data read from the magneto-optical disk 1 by the optical pickup 4 is reproduced by the reproducing unit 11 and switched as an RF signal. It is sent to the switch 12. At this time, the changeover switch 12 is connected to the other terminal by the changeover control signal e from the system controller 17, and the compressed recording data is directly output to the second external output terminal OUT ₂ . In this way, when the compressed data is directly output, the EFM decoder 13, the DRAM 8, the compression decoder 1
4. The signal processing of the D / A converter 15 is omitted, data can be output at high speed, and the rotation speed of the spindle motor 2 is not stopped. It becomes possible to reproduce in.

FIG. 2 shows an MD player 101 according to the present invention.
3 schematically shows a dubbing operation between the device and another device. CD player 100 to MD player 1
When dubbing recorded data to 01, the recorded data output from the CD player 100 is M through the connection line A.
The recording data supplied to the first external input terminal IN ₁ of the D player 101 is compressed by the compression encoder 9 and recorded by the recording unit 5 via the changeover switch 6.

When the recording data is dubbed from the MD player 101 to the DAT deck 102, the reproducing unit 1
The reproduction data from 1 is given to the compression decoder 14 via the changeover switch 12, is expanded by the compression decoder 14 and is then output from the first external output terminal OUT _1.
Through the DAT deck 102.

In any of the above cases, the MD player 10
The signal processing of the compression encoder 9 and the compression decoder 14 in 1 is required. Next, when the recording data is dubbed from the MD player 101 to the MD player 103, the reproduction data from the reproduction unit 11 is directly transferred to the changeover switch 12
To the second external output terminal OUT ₂ via the memory control signal c and the MD player 10
3 is sent to the input terminal IN. At this time, if the MD player 103 has the same configuration as the MD player 101, the transmitted reproduction data is recorded in the form of compressed data, and the MD encoder 103 on the receiving side also uses the compression encoder 9. No processing required. As a result, MD
The signal processing time and DR required for the compression decoder 14 in both the player 101 and the MD player 103
The buffer operation time in AM8 is unnecessary, and therefore high-speed data transfer and high-speed dubbing based on high-speed processing are possible.

Further, the recording operation in the MD player 101, that is, the MD player 103 to the MD player 1
The same applies when dubbing recorded data to 01,
The operation may be the opposite of that described above, and the description thereof will be omitted.

In the above description and FIG. 1, M
The D player 101 has an A / D converter 10 between the first external input terminal IN ₁ and the compression encoder 9,
The description has been made assuming that the D / A converter 15 is provided between the external output terminal OUT ₁ and the compression encoder 14.
The connection line between the compression encoder 9 and the A / D converter 10 is branched to provide a digital input signal terminal for directly inputting a digital signal.
It is also possible to provide a digital output signal terminal capable of directly outputting a digital signal by branching the connection line with the A converter 15.

[0028]

As described above, according to the first aspect of the invention, the compression encoder is bypassed by the switching means according to the signal format of the data to be recorded, that is, whether the data is compressed data or decompressed data. Since it can be recorded by doing so, the time required for compression encoding processing is unnecessary,
The dubbing recording can be speeded up.

According to the second aspect of the present invention, the compression decoder is bypassed and output by the switching means depending on the signal format of the data to be transferred, that is, whether the data is compressed data or decompressed data. As a result, the time required for the compression decoding processing becomes unnecessary, and the dubbing recording can be speeded up.

According to the third aspect of the present invention, one device can perform high-speed dubbing during the recording operation and the reproducing operation, and can cope with the multifunctionalization of the magneto-optical disk recording / reproducing apparatus.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment according to the present invention.

FIG. 2 is a schematic block diagram for explaining the operation of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Magneto-optical disk 2 ... Spindle motor 3 ... Magnetic head 4 ... Optical pickup 5 ... Recording part 6 ... Changeover switch 7 ... EFM encoder 8 ... DRAM 9 ... Compression encoder 10 ... A / D converter 11 ... Reproduction part 12 ... Changeover switch 13 ... EFM decoder 14 ... Compression decoder 15 ... D / A converter 16 ... Servo circuit 17 ... System controller 18 ... Input device 19 ... Display device 100 ... CD player 101 ... MD player 102 ... DAT deck 103 ... MD player a ... Recording control Signal b ... Switching control signal c ... Memory control signal d ... Playback control signal e ... Switching control signal f ... Servo control signal SS ... Spindle servo signal FS ... Focus servo signal TS ... Tracking servo signal HS ... Magnet Head servo signals A ... connecting line B ... connecting line C ... connection line D ... connection line IN ₁ ... first external input terminal IN ₂ ... second external input terminals OUT ₁ ... first external output terminal OUT ₂ ... second external output Terminal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Naoki Shimada 4-2610 Hanazono, Tokorozawa-shi, Saitama Pioneer Co., Ltd. Tokorozawa factory (72) Inventor Tsutomu Sasaki 4-2610 Hanazono, Tokorozawa-shi, Saitama Pioneer Co., Ltd. Tokorozawa Factory (72) Inventor Ryo Oda 4 2610 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa Plant (72) Inventor Yoshitaka Shimoda 42610 Hanazono, Tokorozawa, Saitama Pioneer Co., Ltd. Tokorozawa Plant

Claims (3)

[Claims] 1. An external input terminal for inputting data to be recorded, a compression encoder for compressing and outputting recording data input from the external input terminal, and a magneto-optical device capable of writing compressed recording data. In a magneto-optical disc recording device including a recording unit for recording on a disc, a separate system input terminal for inputting compressed recording data, interposed between the compression encoder and the recording unit, and from the compression encoder Switching means for selectively supplying either one of the compressed recording data to be output or the compressed recording data from the separate system input terminal to the recording part, and the switching means for selecting the input recording data. A recording device for a magneto-optical disk, comprising: a control unit that outputs a switching control signal. 2. A reproducing unit for reproducing compressed data recorded on a magneto-optical disk, a compression decoder for decoding and expanding the reproduced compressed data, and an external output for outputting the expanded reproduced data to the outside. In a reproducing apparatus for a magneto-optical disk having a terminal, compressed data output from the reproducing unit, which is interposed between the external output terminal of a system different from the external output terminal and the reproducing unit and a compression decoder. Switching means for selectively outputting to either the compression decoder or the external output terminal of the separate system, and control means for outputting to the switching means a switching control signal for selecting an output destination of the compressed data. A reproducing device for a magneto-optical disk, comprising: 3. A magneto-optical disk recording / reproducing apparatus comprising both the magneto-optical disk recording / reproducing apparatus according to claim 1 and the magneto-optical disk reproducing apparatus according to claim 2.