JPH09320194A - Compound equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify circuit constitution, while keeping a function as a synthetic equipment by sharing encoding and/or decoding means of first, second recording or reproducing systems. SOLUTION: When a magnetooptical disk(MO) 90 is recording operated or reproducing operated, a system controller 21 controls an operation mode, to execute encoding or decoding for respectively an EFM encoder/decoder 11, an ECC encoder/decoder 16, a sector encoder/encoder 17 and a sound compression encoder/decoder 19. On the other hand, when a compact disk(CD) 91 is reproduced, the system controller 21 controls the operation mode, so as to execute the decoding for respective the EFM encoder/decoder 11 and the ECC encoder/decoder 16. The signal processing systems are shared by the control of this system controller 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite device provided with a first recording or reproducing system and a second recording or reproducing system.

[0002]

2. Description of the Related Art Recording / playback devices compatible with audio data media such as CDs (compact discs) and MDs (minidiscs) are in widespread use.
A CD / MD composite device in which a D recording / reproducing device unit is integrally provided has also been developed. For example, the configuration of the CD / MD composite device is as shown in FIG.

First, as a recording / reproducing drive system for the MD 90, a spindle motor 51, an optical head 52, a sled mechanism 53, a servo driver 54, an RF amplifier 55,
A servo circuit 56, a magnetic head 57, and a magnetic head driver 58 are provided. As the operation of this recording / reproducing drive system, the spindle motor 51 drives the MD90 for CLV rotation, and the optical head 52 and the RF amplifier 55 drive the MD90.
Extraction of voice data and servo information from thread, thread mechanism 5
3 and focus / tracking / sled servo operation by a biaxial mechanism that supports the objective lens in the optical head 52, and data recording operation on the MD 90 by the magnetic head 57, the magnetic head driver 58, and the optical head 52. Focus servo, tracking servo, sled servo, and CLV servo are controlled / executed by the servo circuit 56 and the servo driver 54.

As a signal processing system for decoding reproduction data from the MD90 and encoding recording data to the MD90, EFM encoder / decoders 61, E
FM-PLL circuit 59, ECC encoder / decoder 6
2, a sector encoder / decoder 63, a voice compression encoder / decoder 68, a subcode decoder 64, a groove PLL circuit 60, and a groove decoder 65 are provided.

During reproduction of the MD 90, the audio data extracted by the RF amplifier 55, that is, the EFM signal is supplied to the EFM encoder / decoder 61 and EFM demodulated. The EFM-PLL is used as a clock for decoding processing.
The reproduction clock CK synchronized with the reproduction EFM signal in the circuit 59
_EFM is generated. Further, the subcode decoder 64 extracts the address and other subcode information. EFM
The demodulated data is subjected to error correction decoding by the ECC encoder / decoder 62 and the sector encoder / decoder 6
3 for sector decoding, audio compression encoder / decoder 68 for audio compression decoding (decompression processing for audio compression)
Is performed, the digital audio data of 16-bit quantization and 44.1 KHz sampling format is demodulated.

In order to realize the so-called shock proof function, the processing from the data reproduction from the MD 90 to the sector decoding is intermittently performed at a high speed, and the sector decoded data is stored in the memory controller 67.
D-RAM (buffer memory) 66 once under the control of
Is stored in Then, the data continuously read from the buffer memory 66 at the normal rate is subjected to voice compression decoding by the voice compression encoder / decoder 68, and demodulated to the original digital voice data in the time axis state. The demodulated digital audio data is the multiplexer 7
It is converted into an analog audio signal by the D / A converter 71 via 0 and is output from the output terminal 72 as a reproduced audio signal.

When recording on the MD 90, the analog audio signal input from the input terminal 73 is A
In the / D converter 74, digital audio data of 16-bit quantization and 44.1 KHz sampling form is supplied to the audio compression encoder / decoder 68 via the multiplexer 75 and audio compression encoded.

Then, the data is temporarily stored in the buffer memory 66 under the control of the memory controller 67, and is read out when the data storage amount reaches a predetermined amount. The sector encoder / decoder 63 performs sector encoding and the ECC encoder / decoder 62 corrects errors. Encoding for adding a code and EFM encoding by the EFM encoder / decoder 61 are performed. The EFM signals generated by these encoding processes are supplied to the magnetic head driver 58 as actual recording data and used for the magnetic field applying operation by the magnetic head 57. In addition, at the time of recording MD9
The absolute address is read from the 0 groove and the processing clock is generated. This operation is performed by the groove PLL circuit 60 and the groove decoder 65.

A circuit system for the MD 90 is constructed as described above, and a reproduction drive system and a signal processing system for the CD 91 are provided. First, a spindle motor 81, an optical head 82, a sled mechanism 83, a servo driver 84, an RF amplifier 85, and a servo circuit 86 are provided as a reproduction drive system for the CD 91.

As the operation of the reproducing drive system, the spindle motor 81 drives the CLV to rotate the CD 91, the optical head 82 and the RF amplifier 85 extract audio data and servo information from the CD 91, the sled mechanism 83 and the objective in the optical head 82. Focus / tracking / sled servo operation is performed by a biaxial mechanism that supports the lens. Focus servo, tracking servo, sled servo, and CLV servo are controlled / executed by the servo circuit 86 and the servo driver 84.

Further, as a signal processing system for decoding the reproduction data from the CD 91, EFM decoders 88, E
An FM-PLL circuit 87, an ECC decoder 89, and a subcode decoder 90 are provided. When playing CD91,
The audio data extracted by the RF amplifier 85, that is, the EFM signal is supplied to the EFM decoder 88 and EFM demodulated. As a clock for decoding processing, EFM-
The PLL circuit 87 generates a reproduction clock CK _EFM synchronized with the reproduction EFM signal. Also, the subcode decoder 90
By this, the address and other subcode information are extracted.

The EFM demodulated data is error-corrected and decoded by the ECC decoder 62 to be demodulated into digital audio data of 16-bit quantization and 44.1 KHz sampling form. The demodulated digital audio data is converted into an analog audio signal by the D / A converter 71 via the multiplexer 70 and is output from the output terminal 72 as a reproduced audio signal.

Also, reproduced audio data from the CD 91 is transferred to the MD.
It is also possible to perform dubbing recording on 90, and in this case, EC
The reproduced digital audio data output from the C decoder 89 is supplied to the audio compression encoder / decoder 68 via the multiplexer 75, and the above-described recording data processing for the MD 90 is performed.

The respective operations of the recording / reproducing drive system and the signal processing system for the MD 90 and the reproducing drive system and the signal processing system for the CD 91 as described above are controlled by a system controller 69 formed by a microcomputer. The user operation is performed by the operation unit 91, and the display unit 92 outputs and outputs various information to the user.

[0015]

By configuring the CD / MD composite device as described above, CD reproduction, MD recording,
Operations such as MD reproduction and dubbing recording from CD to MD can be easily performed, and the device can be made convenient for the user. However, as can be seen from FIG. 10, a signal processing system corresponding to the MD90 and a signal processing system corresponding to the CD91 must be provided independently, which makes the circuit configuration of the complex device complicated and large-scaled. Problems such as an increase in the number of parts occur, making it difficult to reduce the size and cost.

Further, there is a problem that the power consumption also increases as the circuit configuration becomes larger. Further, since the system controller 69 has a large number of circuits to be controlled, the number of ports required for the microcomputer also increases, which causes a problem that the microcomputer to be mounted is upsized and the processing load increases.

[0017]

SUMMARY OF THE INVENTION In view of such problems, it is an object of the present invention to realize simplification of circuit configuration and high performance while maintaining the operation function as a composite device.

For this reason, the first device corresponding to a certain recording medium that employs a specific encoding or decoding method as all or a part of the encoding or decoding process to be executed for data recording or reproduction as a composite device. Second recording or reproduction corresponding to a recording or reproduction system and a recording medium in which a specific encoding or decoding method is adopted as all or part of the encoding or decoding processing to be executed for data recording or reproduction A system is provided, and the first recording or reproducing system and the second recording or reproducing system are configured to share one encoding and / or decoding means capable of executing a specific encoding or decoding process.

Further, a recording / reproducing drive means capable of recording and reproducing compressed data on the first recording medium, and reproducing at least uncompressed data recorded on the second recording medium. As a composite device provided with a reproduction drive means capable of performing a specific encoding / decoding process for executing a specific encoding / decoding process.
Decoding means and encoding / compression as data compression processing
A compression encoding / decoding means for executing a decoding process is provided. Then, when the recording / reproducing operation on the first recording medium is performed by the recording / reproducing drive means, the processing of the specific encoding / decoding means and the compression encoding / decoding means is executed on the recording or reproduction data. Further, when the reproducing operation is performed on the second recording medium by the reproducing drive means, the processing of the specific encoding / decoding means is executed for the reproduced data. Further, when the operation of recording the data reproduced from the second recording medium by the reproducing drive means on the first recording medium by the recording / reproducing drive means, a specific encoding / decoding for the data reproduced from the second recording medium is performed. The decoding processing by the means, the encoding processing by the compression encoding / decoding means, and the encoding processing by the specific encoding / decoding means are performed.

That is, the specific encoding / decoding means can be shared for the specific encoding / decoding processing in which the data processing regarding the first recording medium and the data processing regarding the second recording medium are common.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION A CD / MD composite device will be described below as an embodiment of the present invention. The description will be made in the following order. 1. Configuration example of CD / MD combined device 1. Operation during MD playback 3. Operation during MD recording 4. Operation during CD playback 5. Operation during CD-MD dubbing 6. 6. Configuration example of CD / MD combined device as modified example Operation during CD-MD dubbing of a modified CD / MD device

1. Configuration Example of CD / MD Composite Device FIG. 1 shows a configuration example of the CD / MD composite device of this example. In this example, an MD recording / reproducing device unit using the MD90 as a recording medium and a CD reproducing device unit using the CD91 as a recording medium are combined devices.

In FIG. 1, the MD 90 is loaded in a portion which will be an MD recording / reproducing drive system. A spindle motor 1, an optical head 2, a biaxial mechanism 3, a sled mechanism 4, an RF amplifier 5, a magnetic head 6, a magnetic head driver 7, a servo driver 9, and a servo circuit 8 are provided as a recording / reproducing drive system for the MD 90.

Further, the CD 91 is loaded in a portion which will be a CD reproducing drive system. A reproduction drive system for the CD 91 includes a spindle motor 31, optical heads 32, 2
A shaft mechanism 33, a sled mechanism 34, an RF amplifier 35, a servo circuit 36, and a servo driver 37 are provided.

In this example, the signal processing system for decoding the reproduced data from the MD90 and the recording data for the MD90 and the signal processing system for decoding the reproduced data from the CD91 are shared. As this signal processing system, an EFM encoder / decoder 11, an EFM-PLL circuit 12, an ECC encoder /
Decoder 16, sector encoder / decoder 17, audio compression encoder / decoder 19, subcode decoder 14, groove PLL circuit 13, groove decoder 15
Is provided. Further, a D-RAM (buffer memory) 20 used for realizing a shock proof function, which will be described later, and an operation during CD-MD dubbing, and a memory controller 18 for controlling write / read operation of the buffer memory 20 are provided. .

MD loaded in MD recording / reproducing drive system
The (magneto-optical disk) 90 is used as a medium capable of recording audio data, and is rotated by the spindle motor 1 during recording / reproduction. The optical head 2 irradiates the MD 90 with laser light at the time of recording / reproducing to record / record.
Performs the operation as a head during playback. That is, at the time of recording, a high level laser output for heating the recording track to the Curie temperature is provided, and at the time of reproduction, a relatively low level laser output for detecting data from reflected light by the magnetic Kerr effect is provided.

Therefore, the optical head 2 is equipped with a laser diode as a laser output means, an optical system including a polarization beam splitter and an objective lens 2a, and a detector for detecting reflected light. Objective lens 2a
Is the radial direction of MD90 and MD90 by the biaxial mechanism 3.
Is held so as to be displaceable in the direction of contact with and separated from the optical head 2, and the optical head 2 as a whole is movable in the radial direction of the MD 90 by the sled mechanism 4.

The magnetic head 6 is arranged at a position facing the optical head 2 with the MD 90 interposed therebetween. The magnetic head 6 operates to apply a magnetic field modulated by the supplied data to the MD 90. The magnetic head 6 is movable in the disk radial direction by the sled mechanism 4 together with the optical head 2.

The information detected from the MD 90 by the optical head 2 by the reproducing operation with respect to the MD 90 is supplied to the RF amplifier 5. The RF amplifier 5 calculates the supplied RF signal (EFM signal), the tracking error signal TE, the focus error signal FE, and the groove information GV (absolute position recorded in the MD 90 as a pre-groove (wobbling groove)) by processing the supplied information. Information) etc. are extracted. The extracted reproduction RF signal is binarized to be EFM.
Signal (8-14 modulated signal), and the multiplexer 10
Via the EFM encoder / decoder 11 and the EFM-
It is supplied to the PLL circuit 12. Further, the tracking error signal TE and the focus error signal FE are supplied to the servo circuit 8, and the groove information GV is supplied to the groove PLL circuit 13.
And the groove decoder 15.

The servo circuit 8 supplies the tracking error signal TE, the focus error signal FE, and the system controller 2 composed of a microcomputer.
1, various servo drive signals (tracking drive signal, focus drive signal, track jump command, access command, spindle motor 2 rotation speed detection information, etc.)
Sled drive signal, CLV drive signal).

That is, the focus drive signal is generated by performing the phase compensation processing or the like on the focus error signal FE and supplied to the servo driver 9. The servo driver 9 applies power to the focus coil of the biaxial mechanism 3 according to the focus drive signal, and drives the objective lens 3 in the focus direction. Further, the servo circuit 8 performs phase compensation processing or the like on the tracking error signal TE to generate a tracking drive signal and supplies it to the servo driver 9.
The servo driver 9 applies power to the tracking coil of the biaxial mechanism 3 according to the tracking drive signal, and drives the objective lens 3 in the tracking direction. Further, the servo circuit 8 generates a sled drive signal from the low frequency component of the tracking error signal TE and supplies it to the servo driver 9. The servo driver 9 drives the sled mechanism 4 according to the sled drive signal, and drives the optical head 2 and the magnetic head 6 in the disk radial direction. At the time of access operation,
A sled drive signal is generated in response to an instruction from the system controller 21, and the sled mechanism 4 is driven.

Further, the servo circuit 8 compares the rotation speed detection information of the spindle motor 2 with the reference speed information, and thereby CL for keeping the rotation of the spindle motor 1 at a constant linear speed.
Generate a V drive signal. The rotational speed detection information (phase / frequency error information) of the spindle motor 2 is EFM-
The reproduction clock CK _EFM from the PLL circuit 12 or the groove clock CK _GV from the groove PLL circuit 13 is used. The EFM-PLL circuit 12 detects the edge of the EFM signal and injects it into the PLL loop to generate E
A reproduction clock CK _EFM synchronized with the FM signal is generated, that is, the reproduction clock CK _EFM has spindle rotation speed information. Further, since the EFM signal is not extracted at the time of recording on the MD90, the clock synchronized with the spindle rotation is the groove information GV PL.
The groove clock CK _GV obtained by injecting into the L loop will be used. CL generated by the servo circuit 8
The V drive signal is applied to the spindle motor 2 as a three-phase drive signal in the servo driver 9, and the rotation speed of the spindle motor 2 is controlled.

The EFM encoder / decoder 11 is an MD
The encoding / decoding is performed for 8-14 modulation, which is the modulation method adopted in the system and the CD system, and the decoding process for the reproduced EFM signal and the EFM encoding process for the signal to be recorded in the MD 90 are executed. The EFM encoder / decoder 11 functions as a decoder at the time of reproduction, decodes the EFM signal input via the multiplexer 10, and performs ECC.
It is supplied to the encoder / decoder 16. At the time of reproduction, the subcode decoder 14 extracts the address and other subcode information from the EFM decoded data.
A reproduction clock CK _EFM generated by the EFM-PLL circuit 12 is used as the reference clock for the decoding process.

During recording on the MD 90, the EFM encoder / decoder 11 functions as an encoder and supplies the encoded data (EFM signal) to the magnetic head driver 7. In this case, the magnetic head driver 7 is EF
The magnetic head 6 applies N / S magnetic field in response to the M signal pulse. Since the EFM data is not read at the time of recording and therefore the address information and the like by the subcode decoder 14 are not read, the address information extracted from the groove information GV by the groove decoder 15 is used for operation control. A predetermined master clock is used as the reference clock for the encoding process.

The ECC encoder / decoder 16 is an MD
The encoding / decoding is performed with respect to the error correction method (CIRC method) adopted in the system and the CD system. The ECC encoder / decoder 16 functions as a decoder during playback, and the EFM encoder / decoder
Error correction processing is performed on the data input from the decoder 11. Further, the ECC encoder / decoder 16 functions as an encoder during recording, and adds an error correction code to the data input from the sector encoder / decoder 17.

The sector encoder / decoder 17 has M
It performs encoding / decoding regarding the sector format adopted in the D system. The sector encoder / decoder 17 functions as a decoder during reproduction of the MD 90, and the ECC encoder / decoder 1
Sector decoding processing is performed on the data input from 6. The sector-decoded data is temporarily written in the buffer memory 20 under the control of the memory controller 18. The sector encoder / decoder 17 also functions as an encoder during recording, and performs sector encoding processing on the data read from the buffer memory 20.

The audio compression encoder / decoder 19 has M
Encoding (compression) / decoding (decompression) relating to the audio compression method adopted in the D system. The audio compression encoder / decoder 19 functions as a decoder during reproduction of the MD 90, and the buffer memory 20.
The data read from is subjected to audio compression decoding (decompression processing for audio compression) to demodulate digital audio data of 16-bit quantization and 44.1 KHz sampling form. The demodulated digital audio data is converted into an analog audio signal by the D / A converter 23 via the multiplexer 22 and output from the output terminal 24 as a reproduced audio signal.

When recording on the MD 90, the audio compression encoder / decoder 19 functions as an encoder. That is, the analog audio signal input from the input terminal 25 is quantized by the A / D converter 26 in 16 bits,
4.1KHz sampling format digital audio data, audio compression encoder / multiplexer via multiplexer 27
When supplied to the decoder 19, the audio compression encoder / decoder 19 performs a compression process on the data so that the data amount is about ⅕. The compressed data is temporarily stored in the buffer memory 20 under the control of the memory controller 18.
Is written to.

The buffer memory 20 composed of, for example, a D-RAM is for realizing a so-called shock proof function at the time of MD recording / reproduction. In the case of this example, which will be described later in detail, shock proof at the time of CD reproduction. It is used for realizing a function and further for a CD-MD dubbing operation. In particular, during the CD-MD dubbing operation, the storage area is divided into area A and area B as shown in the figure, and is individually used for a predetermined storage operation. In this example, one D-RAM is divided into the area A and the area B for use, but, for example, two memory ICs may be used.

The CD (compact disc) 91 loaded in the CD reproduction drive system is used as a reproduction-only medium in which audio data is recorded in advance in the form of embossed pits. In the CD format, the above-mentioned audio compression encoding and sector encoding are not adopted, and digital audio data of 16-bit quantization and 44.1KHz sampling format is ECC encoded and EFM.
Data in encoded format is recorded.

The CD 91 is rotationally driven at a constant linear velocity (CLV) by the spindle motor 31 during the CD reproducing operation. Then, the data recorded in the pit form on the CD 91 is read by the optical head 32 and supplied to the RF amplifier 35. In the optical head 32, the objective lens 32a is held by the biaxial mechanism 33 and can be displaced in the tracking and focusing directions. Further, the optical head 32 can be moved in the radial direction of the CD 91 by the sled mechanism 34.

In the RF amplifier 35, in addition to the reproduction RF signal,
Focus error signal FE, tracking error signal T
E is generated, and these error signals are supplied to the servo circuit 36. The servo circuit 36 outputs the focus error signal F
Various drive signals such as a focus drive signal, a tracking drive signal, a sled drive signal, and a spindle drive signal are generated from E and the tracking error signal TE, and are supplied to the servo driver 37. The servo driver 37 controls the operations of the biaxial mechanism 33, the sled mechanism 34, and the spindle motor 31 according to these drive signals. These processes are almost the same as the operations of the servo circuit 8 and the servo driver 9 in the MD recording / reproducing drive system described above.

The RF amplifier 35 binarizes the reproduced RF signal into an EFM signal, but in the case of this example, a decoding system dedicated to the CD reproducing drive system is not provided,
Therefore, the EFM signal is transmitted to the EF via the multiplexer 10.
It is configured to be supplied to the M encoder / decoder 11. For this reason, the reproduction clock CK _EFM synchronized with the data reproduction from the CD ₉₁ is the EFM-PLL circuit 1
Generated in 2.

When playing a CD, the EFM encoder /
The decoder 11 functions as an EFM decoder, and further E
The CC encoder / decoder 16 functions as an ECC decoder. Then, the data read from the CD 91 by the ECC decoder processing in the ECC encoder / decoder 16 is demodulated into a digital audio data form of 16-bit quantization and 44.1 KHz sampling. The digital audio data is converted into an analog audio signal by the D / A converter 23 via the buffer memory 20 and the multiplexer 22 and output from the output terminal 24. In addition, the TO when playing the CD91
The subcode decoder 14 also serves to extract control data such as C and subcode.

The system controller 21 is formed by a microcomputer, and controls each unit to perform necessary operations for the MD reproduction operation, MD recording operation, CD reproduction operation, and CD-MD dubbing operation. That is, the system controller 21 controls the servo circuit 8 to cause the MD recording / reproducing drive system (optical head 2 and the like) to perform a required operation, and the servo circuit 3
6 is controlled to cause the CD reproducing drive system (optical head 32 or the like) to execute a required operation.

Further, the EFM encoder / echoda 11, E
CC encoder / Echoda 16, sector encoder /
The encoder / decoder 19 is instructed to perform encoding / decoding processing on the echoda 17 and the audio compression encoder / echoder 19. It also gives an instruction for selecting an input signal to be output in the multiplexers 10, 22, 27. Further, writing / writing of the buffer memory 20 to / from the memory controller 18
Instructions such as reading, address generation, and area setting are performed. Further, address information on the disc and other control information for using the system controller 21 for these controls are obtained from the subcode decoder 14 and the groove decoder 15.

The operation unit 29 is provided with a recording key, a reproduction key, a stop key, an AMS key, a search key, and the like so as to be operated by the user, so that the reproduction / recording operation for the MD 90 and the CD 91 can be performed. Has been That is, the operation information from the operation unit 29 is supplied to the system controller 21, and the system controller 21 causes each of the above units to perform a required operation based on the operation information and the operation program.

Further, the display section 30 carries out a required display operation when the MD 90 and the CD 91 are reproduced or recorded. For example, the time information such as the total playing time, the progress time at the time of reproduction or recording, and various displays such as the track number, the operation state, and the operation mode are displayed under the control of the system controller 21.

For the sake of explanation, the EFM encoder / echoda 11 selects the multiplexer 10 as a signal selecting means to be encoded, and the audio compression encoder / echoder 19 also exists.
The multiplexer 27 is provided as a means for selecting a signal to be encoded by the EFM encoder / echo encoder 1.
1, or if the audio compression encoder / echoda 19 can selectively process a plurality of inputs (that is, has a multiplexer function), it is needless to say that the multiplexer 10 or 27 need not be provided as an independent block. Nor.

In the composite device of the present example configured as described above, the MD reproduction operation, MD recording operation, CD reproduction operation, CD
-MD dubbing operation can be executed, but
Each operation will be described.

2. Operation During MD Playback The control operation of the system controller 21 during the MD playback operation is shown in FIG. That is, the system controller 2
1 performs necessary control on the servo circuit 8 in order to cause the MD recording / reproducing drive system to execute the reproducing operation of the MD 90. The reproduction operation of the MD 90 is an operation of performing high-speed data reading intermittently according to the amount of data stored in the buffer memory 20.

Further, the system controller 21 causes the multiplexer 10 to supply the output of the RF amplifier 5 to the EFM encoder / echoda 11. Also, the EFM encoder / echoder 11, the ECC encoder / decoder 16, the sector encoder / decoder 1
7. The operation mode of each of the audio compression encoder / decoder 19 is controlled so as to execute the decoding process. Further, for the multiplexer 22, the output of the audio compression encoder / decoder 19 is converted into the D / A converter 2
3 to supply.

In this case, the buffer memory 20 is not divided into areas A and B as shown in FIG. An audio compression encoder / decoder 19 for writing the data sector-decoded by the sector encoder / decoder 17 to the memory controller 18 and for reading the data read from the buffer memory 20.
The supply operation to. At this time, the operation of writing the sector-decoded data to the buffer memory 20 is an intermittent operation at a high speed, while the buffer memory 2
The data reading from 0 and the supply operation to the audio compression encoder / decoder 19 are continuous operations at the normal rate.

The MD reproducing operation executed by such control is as follows. The CLV rotation operation of the spindle motor 1 and the focus / tracking servo system are turned on by a start command from the system controller 21 to the servo circuit 8, and data reading by the optical head 2 is started.

By this reproducing operation, the information detected from the MD 90 by the optical head 2 is supplied to the RF amplifier 5. Then, the reproduction RF signal is extracted by the RF amplifier 5,
The EFM signal obtained by further binarization is the EFM encoder / decoder 11, E in the decoding mode.
CC encoder / decoder 16, sector encoder /
After being decoded by the decoder 17, they are once written in the buffer memory 20 by the memory controller 18. The optical head 2 reads data from the MD 90, and the optical head 2 reads data from the buffer memory 20.
The transfer of playback data in the system up to 1.41 Mbit / sec,
Moreover, it is performed intermittently.

The data written in the buffer memory 20 is read out at the timing when the reproduction data is transferred at 0.3 Mbit / sec, and is supplied to the audio compression encoder / decoder 19 in the decoding mode. Then, reproduction signal processing such as decoding processing with respect to audio compression processing is performed, and 16-bit quantization and 44.1 kHz sampling audio data are supplied to the multiplexer 22. As described above, the multiplexer 22 selects the output uncompressed by the audio compression encoder / decoder 19 during the reproduction operation of the MD 90, so that the digital audio signal output from the audio compression encoder / decoder 19 is D / A converted. It is converted into an analog signal by the device 23 and is output from the output terminal 24 as a reproduced audio signal.

The writing / reading of data to / from the buffer memory 20 is performed by addressing by the control of the write pointer and the read pointer by the memory controller 18, but during the reproducing operation of the MD 90, the writing is performed. The pointer (write address) is incremented at the timing of 1.41 Mbit / sec, while the read pointer (read address) is incremented at the timing of 0.3 Mbit / sec. Due to the difference between the bit rates of writing and reading, a certain amount of data is stored in the buffer memory 20. When the full capacity of data is accumulated in the buffer memory 20, the increment of the write pointer is stopped, and the data read operation from the MD 90 by the optical head 2 is also stopped. However, since the read pointer is continuously incremented, the reproduced audio output is not interrupted.

Thereafter, only the read operation is continued from the buffer memory 20, and at some point the buffer memory 20
If the amount of data stored therein is less than or equal to the predetermined amount, the data reading operation and the increment of the write pointer by the optical head 2 are restarted again, and the data is again stored in the buffer memory 20.

By outputting the reproduced voice signal via the buffer memory 20 as described above, the reproduced voice output is not interrupted even if the tracking is missed due to a disturbance or the like, and the accumulated data remains. By accessing to the correct tracking position and restarting the data reading while the operation is in progress, the operation can be continued without affecting the reproduction output. That is, the vibration resistance function (shock proof function) can be significantly improved.

3. Operation during MD recording The control operation of the system controller 21 during the MD recording operation is as shown in FIG. System controller 2
1 performs necessary control on the servo circuit 8 in order to cause the MD recording / reproducing drive system to execute the recording operation to the MD 90. The recording operation to the MD 90 is an operation in which high-speed data writing is intermittently performed (every time a predetermined amount of data is stored) according to the amount of data stored in the buffer memory 20.

The system controller 21 is an EFM.
The operation modes of the encoder / decoder 11, the ECC encoder / decoder 16, the sector encoder / decoder 17, and the audio compression encoder / decoder 19 are controlled so as to execute the encoding process.

Further, to the multiplexer 27 for selecting the data to be audio-compressed and encoded, the audio data inputted from the input terminal 25 and digitized by the A / D converter 26 is selected and supplied to the audio-compression encoder / decoder 19. I will let you. In this case also, the buffer memory 20
2), the division setting of area A and area B as shown in FIG. 1 is not performed. And the memory controller 18
In response to this, an instruction to write the data compressed and encoded by the audio compression encoder / decoder 19 and to supply the data read from the buffer memory 20 to the sector encoder / decoder 17 is issued.

At this time, the operation of writing the audio compression-encoded data into the buffer memory 20 is a continuous operation at a normal rate, that is, the audio signal input to the input terminal 25 is audio-compressed at the same timing and buffered. Write to the memory 20. On the other hand, the data read from the buffer memory 20 and the sector encoder / decoder 17
The supply operation to the buffer memory 20 is performed intermittently at a high rate every time the data storage amount in the buffer memory 20 reaches a predetermined amount.

The MD recording operation executed by such control is as follows. The CLV rotation operation of the spindle motor 1 and the focus / tracking servo system are turned on by the start command from the system controller 21 to the servo circuit 8, and the laser irradiation of the recording level by the optical head 2 is started. Further, at the time of recording, by the groove information GV read from the optical head 2,
The groove decoder 15 is adapted to obtain the address on the disc.

When the recording operation is executed on the MD 90, the recording signal (analog audio signal) supplied to the input terminal 25 is quantized by the A / D converter 26 in 16 bits and digitalized by 44.1 KHz sampling. After being converted into data, it is supplied to the audio compression encoder / decoder 19 via the multiplexer 27, and subjected to audio compression encoding processing for compressing the data amount to about ⅕. The recording data compressed by the audio compression encoder / decoder 19 is temporarily buffered by the memory controller 18 in the buffer memory 2
It is written to 0, read at a predetermined timing, and sent to the sector encoder / decoder 17.

As for the operation in the buffer memory 20, the write pointer (write address) is opposite to that at the time of reproduction.
By incrementing at the timing of 0.3 Mbit / sec, the input voice data can be used as the buffer memory 2 at any time.
It will be written to 0. Then, when a certain amount of data is accumulated in the buffer memory 20, the read pointer is incremented at a timing of 1.41 Mbit / sec and the accumulated data is read and sent to the encoder / decoder unit 8. To be Therefore, the data supply to the sector encoder / decoder 17 (that is, the writing operation to the MD 90 by the magnetic head 6a described below) is
It is performed intermittently according to the amount of storage in the buffer memory 20.

Sector encoder / decoder 17, EC
The C encoder / decoder 16 and the EFM encoder / decoder 11 are in the encoding mode, respectively, and the data read from the buffer memory 20 is subjected to encoding processing such as sector encoding, CIRC encoding, and EFM modulation, and the data (EFM Signal) is
It is supplied to the magnetic head driver 7.

The magnetic head driver 7 is responsive to the recording data (EFM signal) which has been subjected to the encoding process.
And a magnetic head drive signal is supplied to. That is, the magnetic head 6 applies the magnetic field of N or S to the MD 90.

4. Operation During CD Playback FIG. 4 shows the control operation of the system controller 21 during the CD playback operation. That is, the system controller 21
Performs necessary control on the servo circuit 36 in order to cause the CD reproduction drive system to execute the reproduction operation of the CD 91. The reproduction operation of the CD 91 may be a normal-rate continuous reproduction drive, or may be an operation of intermittently performing high-speed data reading as shown in parentheses according to the amount of data stored in the buffer memory 20. Good.

Further, the system controller 21 outputs the output of the RF amplifier 35 to the EFM to the multiplexer 10.
The encoder / echoda 11 is supplied. In addition, the operation modes of the EFM encoder / echoda 11 and the ECC encoder / decoder 16 are controlled so as to execute the decoding process. CD
During reproduction, the sector encoder / decoder 17 and the audio compression encoder / decoder 19 are not used. Further, the multiplexer 22 is made to supply the data read from the buffer memory 20 to the D / A converter 23.

In this case as well, the buffer memory 20 is not divided into areas A and B as shown in FIG. Then, the memory controller 18 is instructed to write the data CIRC decoded by the ECC encoder / decoder 16 and to supply the data read from the buffer memory 20 to the D / A converter 23 via the multiplexer 22. . The optical head 3
When the normal rate continuous reproduction drive is performed by 2, the writing / reading to and from the buffer memory 20 is continuously performed at the normal rate, but the optical head 32 performs the high speed intermittent reproduction drive. In such a case, the operation of writing the CIRC decoded data to the buffer memory 20 is an intermittent operation at a high speed, while the data is read from the buffer memory 20 and supplied to the D / A converter 23. The operation is a continuous operation at a normal rate.

The CD reproducing operation executed by such control is as follows. The CLV rotation operation of the spindle motor 31 and the focus / tracking servo system are turned on by a start command from the system controller 21 to the servo circuit 36, and data reading by the optical head 32 is started.

By this reproducing operation, the information detected from the CD 91 by the optical head 32 is supplied to the RF amplifier 35. The reproduced RF signal is extracted by the RF amplifier 35, and the EFM signal obtained by binarizing the reproduced RF signal is the EFM encoder / decoder 1 in the decoding mode.
1. The data is decoded by the ECC encoder / decoder 16, converted into digital audio data of 16-bit quantization and 44.1 KHz sampling, and then temporarily written in the buffer memory 20 by the memory controller 18.
The subcode decoder 14 extracts control data such as TOC and subcode, which are supplied to the system controller 21 and used for various controls.

The data written in the buffer memory 20 is read at a timing at which the reproduction data is transferred at the normal rate and supplied to the multiplexer 22. As described above, the multiplexer 22 selects the read data of the buffer memory 20 during the reproduction operation of the CD 91.
The digital audio signal from the buffer memory 20 is converted into an analog signal by the D / A converter 23 and output from the output terminal 24 as a reproduced audio signal.

Even during such a CD reproducing operation, the CD 91
The audio data read from the memory controller 1 is once written to the buffer memory 20. In this case as well, writing / reading of data to / from the buffer memory 20 is performed by the memory controller 1.
2 is addressed and controlled by the control of the write pointer and the read pointer.

As described above, the CD by the optical head 32 or the like
The reproducing operation may be continuously performed at the normal rate, but may be intermittently performed at the high rate. When performing intermittently at high speed, read operation from CD30,
The data transfer and the increment of the write pointer (write address) are executed at a high rate. For example, the spindle motor 31 is rotated at a double speed and the data transfer rate is 2.
8Mbit / sec. On the other hand, when the read pointer (read address) is incremented at the normal rate (1.4 Mbit / sec), voice output is normally performed, but some amount of data is always stored in the buffer memory 20. In this state, that is, in the reproducing operation of the CD 91, the high vibration resistance function can be realized as in the reproducing operation of the MD 90.

5. Operation during CD-MD dubbing The control operation of the system controller 21 during dubbing from the CD 91 to the MD 90 is shown in FIG. The system controller 21 controls the servo circuit 36 to cause the CD reproducing drive system to execute the intermittent data read operation of the high speed of the CD 91. Further, the servo circuit 8 is controlled to cause the MD recording / reproducing drive system to execute intermittent data recording operation at a high speed with respect to the MD 90. The reproduction drive of the CD 91 and the recording drive of the MD 90 are performed at different timings, so that each drive operation becomes intermittent.

Further, the system controller 21 outputs the output of the RF amplifier 35 to the multiplexer 10 by EFM.
It is supplied to the encoder / decoder 11. Further, the operation mode of each of the EFM encoder / decoder 11 and the ECC encoder / decoder 16 is controlled so that the encoding process and the decoding process are switched and executed depending on the timing. Regarding the sector encoder / decoder 17, the encoding process and the operation off are switched according to the timing. Further, the audio compression encoder / decoder 19 is always operated in the encode mode.

Both the multiplexer 22 for selecting the data to be output as audio and the multiplexer 27 for selecting the data to be audio compression-encoded are made to select the data read from the area A of the buffer memory 20.

In the case of this dubbing operation, the buffer memory 20 is divided into areas A and B as shown in FIG. And for area A,
The ECC encoder / decoder 16 executes intermittent high-speed writing of CIRC-decoded data and continuous normal-rate reading of written data.
In the area B, the audio compression encoder / decoder 19 performs continuous writing of audio compression-encoded data at a normal rate and reading at a high rate each time the accumulated amount of written data reaches a predetermined amount. Let

CD-executed under such control
The MD dubbing operation is as follows. The switching timing of each control operation is shown in FIG. 6, and the dubbing operation will be described in conjunction with this.

It is assumed that the dubbing operation is started at time t0 in FIG. From this point in time, as shown in FIG. 6A, data reading from the CD 91 is started by the CD reproducing drive system such as the spindle motor 31 and the optical head 32. In this operation, the rotation speed of the spindle motor 31 is rotated at high speed, that is, data reading at high speed is performed.

Then, the EFM extracted by the RF amplifier 35 from the information detected from the CD 91 by the optical head 32.
The signal passes through the multiplexer 10 and is shown in FIG.
As shown in (c), it is decoded by the EFM encoder / decoder 11 and the ECC encoder / decoder 16 which are in the decoding mode during this period, and is converted into a digital audio data form of 16-bit quantization and 44.1 KHz sampling. . Further, as shown in the upper part of FIG. 6E, the decoded digital audio data is written in the area A of the buffer memory 20 at a high rate.

The data written in the area A of the buffer memory 20 is read at the timing at which the reproduction data is transferred at the normal rate, and is supplied to both the multiplexers 22 and 27, as shown in the lower part of FIG. 6 (e). . At this time, since the multiplexer 22 selects the read data of the buffer memory 20, the digital audio data read from the buffer memory 20 is converted into an analog audio signal by the D / A converter 23, as shown in FIG. The sound is output from the output terminal 24 as the monitor sound of the dubbing operation.

On the other hand, the read data (16-bit quantization, digital data of 44.1 KHz sampling) from the buffer memory 20 is also supplied to the audio compression encoder / decoder 19 through the multiplexer 27, as shown in FIG. As described above, the audio compression encoder / decoder 19 is in the encoding mode, and the audio compression encoding process for compressing the data amount to about 1/5 is executed. The data compressed by the audio compression encoder / decoder 19 is shown in FIG.
(H) As shown in the upper part, the data is written in the area B of the buffer memory 20 at the timing of the normal rate (0.3 Mbit / sec).

The above operation is performed from the time t0 when the dubbing is started, but the amount of data accumulated in the area B of the buffer memory 20 gradually increases as a result of this operation, as shown in FIG. 6 (i). . Here, at time t1,
It is assumed that the amount of data stored in area B has reached a predetermined amount (n clusters). The cluster corresponds to the data amount which is the minimum unit of the recording operation of the MD 90, and in this example, recording is performed in n cluster units.

At the time point t1 when the data storage amount becomes n clusters, the system controller 21 determines that the sector encoder / decoder 17, the ECC encoder / decoder 16,
Control is performed to set each of the EFM encoder / decoder 11 to the encode mode (FIGS. 6B and 6C).
(D)). Further, the reproducing operation of the CD reproducing drive system is stopped (FIG. 6 (a)), and the recording operation of the MD recording / reproducing drive system is started (FIG. 6 (j)).

Then, as shown in FIGS. 6E to 6H, data reading from the area A, monitor output by the read data,
As shown in the lower part of FIG. 6 (h), the data from the area B is continuously recorded while the operations at the normal rate, that is, the audio compression encoding of the read data and the writing of the audio compression encoded data into the area B are continued. Start reading.
This data reading is performed at a high rate (eg 1.41 Mbit / sec).

The data read from the area B is sector-encoded by the sector encoder / decoder 17, the ECC encoder / decoder 16, and the EFM encoder / decoder 11, which are in the encoding mode, respectively.
Encoding processing such as CIRC encoding and EFM modulation is performed, and the data (EFM signal) is supplied to the magnetic head driver 7. The magnetic head driver 7 supplies a magnetic head drive signal to the magnetic head 6 in accordance with the encoded recording data (EFM signal), and causes the magnetic head 6 to apply an N or S magnetic field to the MD 90. The data read from the area B to the recording operation by the magnetic head 6 is performed at a high rate.

After this time t1, the buffer memory 20
As for area B, the normal rate writing is continued, but the high rate reading is performed.
The amount of accumulated data decreases as shown in FIG.

The MD recording operation started at time t1
For example, the process ends when the data recording for n clusters is completed. If this is the time t2, the same operation as the period from t0 to t1 is performed from the time t2. That is, C
A high speed reproduction operation of the CD 91 is performed in the D reproduction drive system, decoded by the EFM encoder / decoder 11 and the ECC encoder / decoder 16, and the buffer memory 20
Area A is written.

Then, data reading from the area A, monitor output by the read data, voice compression encoding of the read data, writing of the voice compression encoded data to the area B,
The operation performed at the normal rate is continued as it is, but the data read from the area B to the magnetic head 6 is continued.
The operation up to recording is not performed.

Further, by such an operation after the time point t2, the data storage amount of the area B increases again,
When the accumulated amount reaches n clusters at the 3rd time point, the same operation as in the t1 to t2 period is executed after the 3rd time point. In the same way, the CD-M is executed by alternately performing such operations.
Dubbing of D is executed.

In the composite device of this example, MD reproduction, MD recording, CD reproduction, and CD-MD dubbing can be executed as described above, but in this example, a decoding system dedicated to the CD reproduction drive system is used. The EFM encoder / decoder 11 and the ECC encoder / decoder 16 are used for the decoding process when reproducing the CD, without providing them. Also CD
During dubbing in which reproduction and MD recording are performed, the buffer function of the buffer memory 20 is used to reproduce the CD (see FIG. 6).
(T0 to t1 period, t2 to t3 period) and MD recording period (t1 to t2 period, t3 to t4 period in FIG. 6) are divided into C
Performs D playback and MD recording at a high speed, and EF
By setting the operations of the M encoder / decoder 11 and the ECC encoder / decoder 16 to the decode mode and the encode mode in a time division manner, dubbing can be performed without providing a dedicated decode system for the CD reproduction drive system.

From the above, in the composite device of this example, MD
The circuit scale can be greatly reduced while enabling reproduction, MD recording, CD reproduction, and CD-MD dubbing, and along with this, effects such as device miniaturization, cost reduction, and power consumption reduction can be obtained. You can Further, the number of ports of the microcomputer used as the system controller 21 can be reduced.

Further, in the case of this example, since audio is output through the buffer memory 20 even during CD reproduction,
As for the CD reproduction, the shock proof function can be exerted as in the case of the MD reproduction. Further, during the dubbing, the respective operations as the CD reproducing period and the MD recording period are alternately performed as described above, but the monitor audio output to the user is continuously performed as in the normal CD reproducing operation. It can also be used for listening to music while dubbing.

6. Configuration Example of CD / MD Compound Device as Modification Example Next, FIG. 7 shows a configuration of a CD / MD compound device as a modification example. In this example, the area of the buffer memory 20 is not divided, and other configurations are basically the same as those in FIG. 1. Therefore, the same parts are designated by the same reference numerals and the description thereof will be omitted.

The MD reproducing operation and MD recording operation in this case are the same as those in the above example. Regarding the CD reproducing operation, a reproducing signal is output through a path including the optical head 32, the RF amplifier 35, the multiplexer 10, the EFM encoder / decoder 11, the ECC encoder / decoder 16, the multiplexer 22, the D / A converter 23, and the output terminal 24. It In this example, the buffer memory 20 is not used, and thus the signal transmission is performed at the normal rate. However, also in this case, the output of the ECC encoder / decoder 16 is accumulated in the buffer memory 20 at a high rate,
It is also possible to realize the so-called shock proof function by supplying the data read at the normal rate to the D / A converter 23 and outputting it from the output terminal 24.

7. Operation during CD-MD dubbing of CD / MD combined device as a modified example In the example of FIG. 7, the monitor output of the CD playback sound is not performed during the operation during CD-MD dubbing. is there.

FIG. 8 shows the control operation of the system controller 21 when dubbing from the CD 91 to the MD 90. The system controller 21 controls the servo circuit 36 to cause the CD reproducing drive system to execute the data reading operation of the CD 91. Further, by controlling the servo circuit 8, M
The D recording / reproducing drive system is caused to execute the data recording operation for the MD 90. CD91 playback drive and MD
90 recording drives are performed at different timings,
Therefore, each drive operation becomes intermittent.

Each drive operation may be performed at a high rate or at a normal rate. Further, one may be the high rate and the other may be the normal rate. When the CD playback sound during dubbing recording is not monitored as in this example, there is no limitation on the operating speed in the playback operation / recording operation. However, it goes without saying that the dubbing operation can be completed quickly by performing each drive operation at a high speed, which is preferable.

Further, the system controller 21 outputs the output of the RF amplifier 35 to the EFM to the multiplexer 10.
The encoder / echoda 11 is supplied. Further, the operation mode of each of the EFM encoder / echoder 11 and the ECC encoder / decoder 16 is controlled so that the encoding process and the decoding process are switched and executed depending on the timing.

Regarding the sector encoder / decoder 17, the encoding process and the operation off are switched according to the timing. Further audio compression encoder / decoder 19
With respect to, the data output from the ECC encoder / decoder 16 is supplied to the multiplexer 27 which switches the encoding process and the operation off at the timing opposite to that of the sector encoder / decoder 17 and selects the data to be subjected to the audio compression encoding. Select.

In the case of this dubbing operation, the buffer memory 20 is not divided into areas A and B as in the example of FIG. And the buffer memory 20
In response to the above, the audio compression encoder / decoder 19 is caused to execute the writing of the audio compression-encoded data and the reading each time the accumulated amount of the written data reaches a predetermined amount.

The CD-executed under such control
The MD dubbing operation is as follows. The switching timing of each control operation is shown in FIG. 9, and the dubbing operation will be described in conjunction with this.

It is assumed that the dubbing operation is started at time t10 in FIG. From this point, as shown in FIG.
Data reading from the CD 91 is started by the CD reproducing drive system such as the spindle motor 31 and the optical head 32. The EFM signal extracted by the RF amplifier 35 from the information detected from the CD 91 by the optical head 32 is
Through the multiplexer 10, as shown in FIGS. 9B and 9C, the EFM encoder / decoder 11 and the ECC encoder / decoder 1 which are in the decode mode during this period.
Decoded by 6 respectively, 16-bit quantization, 44.1KH
It will be in the form of z-sampling digital audio data.

Further, this 16-bit quantization, digital audio data of 44.1 KHz sampling is transmitted to the multiplexer 2
7 is supplied to the audio compression encoder / decoder 19 via the audio compression encoder / decoder 19 as shown in FIG.
The decoder 19 is in the encode mode, and the audio compression encoding process for compressing the data amount to about 1/5 is executed. The data compressed by the audio compression encoder / decoder 19 is written in the buffer memory 20 as shown in FIG.

Since the above operation is performed from the time point t10 when the dubbing is started, the amount of data accumulated in the buffer memory 20 gradually increases as shown in FIG. 9 (g). Here, it is assumed that the data storage amount reaches a predetermined amount (n clusters) at time t11. Then the system controller 2
1 is a sector encoder / decoder 17, an ECC encoder / decoder 16, an EFM encoder / decoder 1
Control of setting each of 1 to the encode mode is performed (FIGS. 9B, 9C and 9D). The operation of the audio compression encoder / decoder 19 is turned off (FIG. 9 (e)) and the CD
Stop the playback operation of the playback drive system (Fig. 9 (a))
At the same time, the recording operation of the MD recording / reproducing drive system is started (FIG. 9 (h)).

Then, data is read from the buffer memory 20 as shown in FIG. 9 (f). The read data is the sector encoder / decoder 17, the ECC encoder / decoder 16, E in the encoding mode.
The FM encoder / decoder 11 respectively performs sector encoding, CIRC encoding, and EFM modulation encoding processing, and the data (EFM signal) is supplied to the magnetic head driver 7. Magnetic head driver 7
Supplies a magnetic head drive signal to the magnetic head 6 according to the encoded recording data (EFM signal), and M
The magnetic head 6 applies an N or S magnetic field to D90.

After time t11, the buffer memory 2
As for 0, writing is not performed and only reading is performed, so that the data storage amount decreases as shown in FIG. 9 (g). And the MD started at time t11
The recording operation is once ended when the data recording for n clusters is completed and the accumulated amount becomes zero. If this is t12, from t12 to t10 to t11
The same operation as the period is performed. That is, the CD 91 is reproduced by the CD reproducing drive system, the EFM encoder / decoder 11 and the ECC encoder / decoder 16 perform decoding processing, the audio compression encoder / decoder 19 performs audio compression encoding, and the audio compression encoded data buffer memory 20. The writing operation is performed.

Further, by such an operation after the time t12, the data storage amount of the buffer memory 20 increases again. However, if the storage amount reaches n clusters at the time t13, from the time t13 to the period t11 to t12. The same operation as is executed. In the same manner, CD-MD dubbing is performed by alternately performing such operations.

That is, in the composite device of this example, audio monitoring cannot be performed during CD-MD dubbing, but the same C as in the example of FIG.
MD playback, MD recording, CD playback, CD-M with a simple circuit configuration without providing a dedicated decoding system for the D playback drive system.
D-dubbing can be executed. That is, similar to the example of FIG. 1, it is possible to obtain the effects of downsizing the device, reducing the cost, reducing the power consumption, and reducing the number of ports of the microcomputer serving as the system controller 21.

Further, in this example, since the area division of the buffer memory 20 is not performed, the memory control operation is also simplified. By the way, although audio monitoring cannot be performed during CD-MD dubbing, conversely, this means that CD playback / MD recording may be performed at any speed during dubbing. Therefore, for example, 4 × speed, 8 × speed, etc. By performing CD reproduction / MD recording at a high transfer rate, there is an advantage that the time required for dubbing can be shortened.

Although the embodiments of the present invention have been described above, the present invention can be realized as various composite devices. For example, it may be a composite device having an MD reproducing device unit and an MD recording device unit, or a composite device having a recording / reproducing device unit using a tape medium such as DAT.

[0115]

As described above, the composite device of the present invention is one encoding and / or decoding which can execute a specific encoding or decoding process in the first recording or reproducing system and the second recording or reproducing system. The means are shared. Further, a recording / reproducing drive means capable of recording and reproducing compressed data on the first recording medium, and reproducing at least non-compressed data recorded on the second recording medium. As a composite device provided with a reproduction drive means capable of performing a specific encoding / decoding process,
Decoding means and encoding / compression as data compression processing
A compression encoding / decoding means for executing a decoding process is provided. Then, when the operation of recording the data reproduced from the second recording medium by the reproducing drive means on the first recording medium by the recording / reproducing drive means, a specific encoding / decoding for the data reproduced from the second recording medium is performed. The decoding processing by means, the encoding processing by the compression encoding / decoding means, and the encoding processing by the specific encoding / decoding means are performed.

That is, according to the present invention, the specific encoding / decoding means can be shared for the specific encoding / decoding processing in which the data processing regarding the first recording medium and the data processing regarding the second recording medium are common. As a result, the number of parts is reduced and the circuit configuration is simplified while maintaining the operation function as a composite device.
Along with this, it is possible to obtain effects such as miniaturization of equipment, cost reduction, reduction of power consumption, reduction of the number of ports of the microcomputer and processing load.

[Brief description of drawings]

FIG. 1 is a block diagram of a composite device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of control during MD reproduction of the composite device according to the embodiment.

FIG. 3 is an explanatory diagram of control during MD recording of the composite device according to the embodiment.

FIG. 4 is an explanatory diagram of control at the time of playing a CD in the composite device according to the embodiment.

FIG. 5 is an explanatory diagram of control during CD-MD dubbing of the composite device of the embodiment.

FIG. 6 is an explanatory diagram of control switching timing at the time of CD-MD dubbing of the composite device of the embodiment.

FIG. 7 is a block diagram of a composite device that is a modified example of the present invention.

FIG. 8 is an explanatory diagram of control during CD-MD dubbing of a composite device of a modified example.

FIG. 9 is an explanatory diagram of the timing of control switching at the time of CD-MD dubbing of the composite device of the modified example.

FIG. 10 is a block diagram of a conventional composite device.

[Explanation of symbols]

1,31 Spindle motor, 2,32 Optical head,
3,33 2-axis mechanism, 4,34 thread mechanism, 5,3
5 RF amplifier, 6 magnetic head, 7 magnetic head driver, 9,37 servo driver, 8,36 servo circuit, 10,22,27 multiplexer, 11 EFM
Encoder / decoder, 12 EFM-PLL circuit, 1
3 groove PLL circuit, 14 subcode decoder,
15 groove decoder, 16 ECC encoder / decoder, 17 sector encoder / decoder, 18
Memory controller, 19 audio compression encoder / decoder, 20 buffer memory, 21 system controller, 23 D / A converter, 24 output terminal, 25 input terminal, 26 A / D converter, 29 operation unit, 30 display unit, 90 MD , 91 CD

Claims (4)

[Claims] 1. A first recording or reproducing system corresponding to a recording medium in which a specific encoding or decoding method is adopted as all or a part of the encoding or decoding processing to be executed for data recording or reproduction. And a second recording or reproducing system corresponding to a certain recording medium in which the specific encoding or decoding method is adopted as the whole or a part of the encoding or decoding process to be executed for data recording or reproduction. The first recording / reproducing system and the second recording / reproducing system are configured to share one encoding and / or decoding means capable of executing the specific encoding or decoding process. Combined device characterized by 2. A recording / reproducing drive means capable of recording and reproducing compressed data on a first recording medium, and reproducing at least uncompressed data recorded on a second recording medium. The recording / reproducing includes: a reproducing drive unit capable of performing a specific encoding / decoding process; a specific encoding / decoding unit performing a specific encoding / decoding process; When the recording or reproducing operation is performed on the first recording medium by the drive means, the processing of the specific encoding / decoding means and the compression encoding / decoding means is executed on the recording or reproducing data, and the reproducing drive means performs When the reproducing operation for the second recording medium is performed, the reproducing operation is performed. The processing of a particular encoding / decoding means with respect chromatography data is performed,
Further, in the case where the operation of recording the data reproduced from the second recording medium by the reproduction drive means on the first recording medium by the recording / reproduction drive means is performed, the data reproduced from the second recording medium is processed. A composite device configured to perform a decoding process by the specific encoding / decoding unit, an encoding process by the compression encoding / decoding unit, and an encoding process by the specific encoding / decoding unit. 3. A first storage area and a second storage area capable of storing reproduction data or recording data are provided, and the data reproduced from the second recording medium by the reproduction drive means is recorded and reproduced. First by drive means
When the recording operation is performed on the recording medium, the data reproduced from the second recording medium and decoded by the specific encoding / decoding means is stored in the first storage area. The data read from the first storage area of the storage means is encoded by the compression encoding / decoding means and stored in the second storage area, and the data read from the second storage area is subjected to the specific encoding / 3. The composite device according to claim 2, wherein the data subjected to the encoding processing by the decoding means is supplied to the recording / reproducing drive means and recorded on the first recording medium. 4. An operation of storing in the first storage area the data obtained by decoding the data reproduced from the second recording medium by the specific encoding / decoding means, and the second storage area. The operation of supplying the data read out from the storage device to the recording / reproducing drive means and recording the data on the first recording medium by performing the encoding processing by the specific encoding / decoding means is the data in the second storage area. The composite device according to claim 3, wherein the composite device is executed by being switched in a time division manner according to the accumulated amount.