JP2000195164A - Device and method to record and reproduce data and medium to record the program for the above operations - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce data from a recording medium, which is conducting a data reproducing, and to record data onto the medium, which is conducting a data reproducing, without employing plural data recording and reproducing devices and recording media in a data recording and reproducing device that uses a recording medium on which compressed data are recorded. SOLUTION: When recording or reproducing interruption occurs during reproducing or recording, a system controller 15 interrupts the reproducing of digital data from a disk 31 or the recording of digital data to the disk 31 every time the amount of digital data to be recorded to a first memory 5 and a second memory 25 reaches a prescribed amount, executes a search operation to move an optical pickup 1 so that restarts of recording of the digital data to the disk 31 or a reproducing of the digital data from the disk 31 are repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a data recording / reproducing method and a data recording / reproducing apparatus using compressed data as data recorded on a recording medium.

[0002]

2. Description of the Related Art Conventionally, in a data storage / reproducing apparatus using compressed data as data to be recorded on a recording medium, a transfer rate of data recorded on the recording medium, a transfer rate of data inputted to the apparatus main unit, and a recording rate of the data. Since the transfer rate of the data reproduced from the medium and the transfer rate of the data output from the apparatus main body are different, in order to absorb the difference in the data transfer rate, the data recorded on the recording medium and the data reproduced from the recording medium are removed. Data to be stored once in memory,
The data stored in the memory is read out and recorded on a recording medium or output from the apparatus main body, and the recording of data on the recording medium and the reproduction of data from the recording medium are performed intermittently according to the amount of data in the memory. I was

[0003]

However, in the above-mentioned conventional apparatus, when data is recorded on a recording medium, it is necessary to reproduce the data recorded on the recording medium, When playing data,
If it is necessary to record data and the data reproduction cannot be interrupted, it is necessary to record the data to be recorded on another recording medium by another data recording / reproducing device. Recording / reproducing device and 2
In addition, there is a problem that one recording medium is required, and when the recording medium for recording the data is determined due to the continuity of the data recorded on the recording medium, another There is a problem that data recorded on the recording medium must be dubbed to the recording medium to be recorded, and a complicated operation is required.

[0004] Separately, audio data is included as data to be recorded on a recording medium, and the audio data is transmitted to a plurality of sources (eg, DVD, CD, TAP).
E, etc.), the recording level is not constant, so that when audio data is reproduced from the recording medium, the volume, frequency characteristics, etc. are changed according to the original source. There is a problem that adjustment is necessary. To solve the problem, audio data is reproduced from a storage medium, the volume and frequency characteristics of the reproduced audio data are adjusted, and the audio after the adjustment is adjusted. Since data needs to be recorded on another recording medium, there is a problem that two data recording / reproducing devices and two recording media are required. If there is a recording medium to record data for, for example, there is a need to dub the data recorded on another recording medium to the original recording medium, it requires complicated operations and There is a problem that requires a long time to the current work.

The present invention provides a data recording apparatus capable of reproducing data from a recording medium on which data is being recorded or recording data on a recording medium on which data is being reproduced without using a plurality of data recording / reproducing devices and recording media. It is an object to provide a playback device.

[0006]

In order to achieve the above object, the invention according to claim 1 uses compressed data as data recorded on a recording medium and reduces the data transfer rate caused by data compression and decompression. In a data recording / reproducing apparatus which absorbs a speed difference by intermittently recording compressed data on a recording medium or reproducing compressed data from the recording medium at the same time as storing the data in the memory, the data recorded on the recording medium And the data reproduced from the recording medium are stored in the memory, and when recording of the compressed data on the recording medium or reproduction of the compressed data from the recording medium is interrupted, reproduction of the compressed data from the recording medium or A control means for recording the compressed data on the recording medium is provided.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, when the control means suspends the reproduction of the compressed data from the recording medium, the data stored in the memory is transmitted. When the data is read and recorded on the recording medium, the data is recorded in the area where the reproduction of the compressed data has been completed.

According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, signal processing means for performing predetermined signal processing on data reproduced from a recording medium is provided. When the compressed data is reproduced from the recording medium, the data subjected to the predetermined signal processing by the signal processing means is stored in the memory, and when the reproduction of the compressed data from the recording medium is interrupted, the memory Is read out and recorded on the recording medium.

According to a fourth aspect of the present invention, in addition to the configuration of the first or second aspect, a mixing means for mixing data reproduced from a recording medium and data input to the apparatus main body is provided. The control means stores the data mixed by the mixing means in a memory when the compressed data is reproduced from the recording medium, and stores the data in the memory when the reproduction of the compressed data from the recording medium is interrupted. The read data is read and recorded on the recording medium.

According to a fifth aspect of the present invention, compressed data is used as data to be recorded on a recording medium, and a difference in data transfer speed caused by compression and decompression of data is reduced.
In a data recording / reproducing method in which data is stored in a memory and the compressed data is recorded on the recording medium or the compressed data is reproduced from the recording medium intermittently, the data recorded on the recording medium and the data recorded on the recording medium are intermittently absorbed. Stores the reproduced data in a memory, and when the recording of the compressed data on the recording medium or the reproduction of the compressed data from the recording medium is interrupted, the reproduction of the compressed data from the recording medium or the recording to the recording medium. Is recorded.

According to a sixth aspect of the present invention, a data recording / reproducing apparatus intermittently reproduces compressed data recorded on a recording medium and stores it in a memory, and reads and decompresses the compressed data stored in the memory. Outputting the compressed data to be recorded on the recording medium in the memory, reading the compressed data stored in the memory and recording the data intermittently on the recording medium, and recording the data on the recording medium intermittently. While the storage of the compressed data in the memory and the output by reading and decompressing the compressed data from the memory are continued, while recording of the compressed data on the recording medium or reproduction of the compressed data from the recording medium is interrupted, the recording is stopped. A step of reproducing compressed data from a medium or recording compressed data on the recording medium.

Therefore, according to the present invention, the data to be recorded on the recording medium and the data reproduced from the recording medium are stored in the memory, and the compressed data to be recorded on the recording medium is stored. A plurality of data recording / reproducing apparatuses by causing the reproduction of the compressed data from the recording medium or the recording of the compressed data to the recording medium while the recording of the data or the reproduction of the compressed data from the recording medium is interrupted. It is possible to reproduce data from a recording medium during data recording or to record data on a recording medium during data reproduction without using a recording medium.

According to the second aspect of the present invention, data to be recorded on a recording medium and data reproduced from the recording medium are stored in a memory, and when reproduction of compressed data from the recording medium is interrupted, By recording the data read from the memory in the area of the recording medium where the reproduction of the compressed data has been completed, the data reproduction from the recording medium during the data recording or the data reproduction during the data reproduction can be performed using the recording medium with a small free space. Data can be recorded on a recording medium.

According to the third aspect of the present invention, when the compressed data is reproduced from the recording medium, the signal processing means performs predetermined signal processing on the reproduced data, and the control means performs the predetermined signal processing. A plurality of data recording / reproducing apparatuses by storing the applied data in a memory and reading out the data stored in the memory and recording the data on the recording medium when reproduction of the compressed data from the recording medium is interrupted. It is possible to record data obtained by performing predetermined signal processing on data recorded on a recording medium without using a recording medium.

According to the fourth aspect of the present invention, when the compressed data is reproduced from the recording medium, the mixing means mixes the reproduced data with the data input to the apparatus body, and the control means mixes the mixed data. Store the data in memory
When the reproduction of the compressed data from the recording medium is interrupted, the data stored in the memory is read out and recorded on the recording medium, so that the recording medium can be recorded without using a plurality of data recording / reproducing devices or recording media. And data obtained by mixing desired data with data recorded in the recording medium can be recorded on the recording medium.

[0016]

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

FIG. 1 is a functional block diagram showing an electrical configuration of a magneto-optical disk device as an embodiment of a data recording / reproducing apparatus according to the present invention, and FIG. 2 is an operation control at the time of data interruption reproduction in the magneto-optical disk device. FIG. 3 is a flowchart showing operation control when data recording and data reproduction are simultaneously performed in the magneto-optical disk device. FIG. 4 is a flowchart showing operation control during data interrupt recording in the magneto-optical disk device. 5 is a flowchart showing the operation control at the time of data editing in the magneto-optical disk device.

A magneto-optical disk drive according to an embodiment of the data recording / reproducing apparatus of the present invention will be described below with reference to FIGS.

Referring to FIG. 1, the data reproducing operation will be described. The optical pickup 1 irradiates a disk 31 as a recordable / reproducible recording medium with light,
Is a reproducing head that captures reflected light from the
1 is read out.

The RF amplifier 2 amplifies the RF signal read by the optical pickup 1 and sends it to the encoder / decoder / signal processing circuit 3. Also,
The RF amplifier 2 generates servo control signals such as a focus error signal and a tracking error signal from the signal,
The signal is sent to the servo circuit 4.

An encoder / decoder / signal processing circuit (hereinafter, referred to as a signal processing circuit) 3 is provided so as to be able to communicate with a system controller 15 for processing sub-codes and the like. The digital data is demodulated and converted to digital data. The digital data is subjected to predetermined processing such as error correction and transferred to the first memory controller 4.

The first memory controller 4 controls the write operation and the read operation of the first memory 5 in accordance with an instruction from the system controller 15 so that the digital data passed through the signal processing circuit 3 is stored in the first memory 5. It has become. Also, the first memory controller 4
Is configured to transfer the digital data output from the signal processing circuit 3 to the first memory 5 and to transfer the digital data output from the first memory 5 to the data decompression circuit 6. Further, the first memory controller 4
Detects the amount of digital data stored in the first memory 5 by monitoring the address of the first memory 5, and outputs the detection result to the system controller 15.

The first memory 5 temporarily stores digital data output from the signal processing circuit 3, and is constituted by a DRAM (Dynamic Random Access Memory). The first memory 5 is disposed between the signal processing circuit 3 and the data decompression circuit 6 to protect digital data to prevent interruption of reproduction due to disturbance such as vibration, and 3 is provided for the purpose of absorbing the difference between the transfer speed of the digital data output from the digital decompression circuit 3 and the transfer speed of the digital data input to the data decompression circuit 6.

The data expansion circuit 6 expands the time axis of the digital data output from the first memory controller 4 and time-compressed at a predetermined compression rate, and performs D / A conversion by the D / A converter 7.
In addition, the data is output to the digital output terminal 10.

The D / A converter 7 includes a data decompression circuit 6
The digital data that has been output from the data and expanded on the time axis is converted back to the original analog data, and then output to the data adjustment circuit 8.

The data adjustment circuit 8 includes a D / A converter 7
After adjusting the volume and frequency characteristics of the analog data output from, the analog data is output to the output terminal 9, the data mixing circuit 20, and the data selection circuit 21.

The analog output terminal 9 can be connected to an output unit (not shown) having a speaker or the like, and the digital output terminal 10 can be connected to a data recording device (not shown) having a digital input terminal. .

The spindle motor 11 is a motor for rotating the disk 31. The feed motor 12 is a motor for moving the optical pickup 1 in a direction perpendicular to a recording track (not shown) of the disk 31.
The driver circuit 13 includes a spindle motor 11, a feed motor 12, and an objective lens (not shown) of the optical pickup 1.
In order to operate a driving device (not shown) for driving
Electric power is supplied to these.

The servo control circuit 14 includes the optical pickup 1
This is a circuit for performing field-back control of each of the above-described devices driven by the driver circuit 13 so that an operation of, for example, causing light emitted from the device to follow a target recording track of the disk 31 is performed accurately. This servo control circuit 14
In accordance with an instruction from the system controller 15, a control amount such as focus, tracking, and spin is determined based on the servo signal output from the RF amplifier 2, and the control amount is sent to the driver circuit 13 as a control signal. .

The system controller 15 includes a signal processing circuit 3, a first memory controller 4, and a servo control circuit 1.
4, power supply circuit 17, data selection circuit 21, second
It is a microcomputer that centrally manages the memory controller 24 and the head driving device 26.

The input device 16 is composed of switches, keys, and the like (not shown). For example, after a switch is turned on to enable input, a plurality of digital data can be written to the disk 31 by a manual input operation using a keyboard or the like. A processing operation such as erasure and a reproduction order of a plurality of data recorded on the disk 31 are input to the system controller 15.

The power supply circuit 17 includes the optical pickup 1 and the RF
Power is supplied to the amplifier 2, the signal processing circuit 3, the driver circuit 13, the servo control circuit 14, and the head driving device 26.

The data recording operation will be described. The analog input terminal 18 can be connected to an input unit (not shown) having a microphone and the like.
9 can be connected to a data reproducing device (not shown) having a digital output terminal. Also, analog input terminal 1
8 is a data mixing circuit 20
And the data selection circuit 21.
The digital input terminal 19 outputs the input digital data to the data selection circuit 21.

The data mixing circuit 20 includes the data adjustment circuit 8
Analog data output from the analog input terminal 18
Is mixed with the analog data input thereto and output to the data selection circuit 21. The data mixing circuit 20 is connected to the analog input terminal 18 if necessary.
After the components of the analog data output from the data adjustment circuit 8 are removed from the analog data input to, the mixing with the analog data output from the data adjustment circuit 8 is performed.

The data selection circuit 21 receives the analog data input to the analog input terminal 18 and the digital input terminal 1
9 to select either digital data input to analog data or analog data output from the data mixing circuit.
The data is output to either the converter 22 or the data compression circuit 23.

The A / D converter 22 converts the analog data output from the data selection circuit 21 into a digital signal.
The digital data is output to the data compression circuit 23.

The data compression circuit 23 includes a data selection circuit 2
The time axis of the digital data output from 1 or the digital data output from the A / D converter 22 is compressed to a predetermined compression ratio, for example, about 1/5, and transferred to the second memory controller 24. .

The second memory controller 24 transfers the digital data output from the data compression circuit 23 to the second memory 25 and, at the same time, transfers the amount of digital data stored in the second memory 25 to the second memory 25. The address is detected by monitoring the address, and the detection result is output to the system controller 15.

The second memory 25 temporarily stores the digital data output from the data compression circuit 23, and is constituted by a DRAM. The second memory 5 is disposed between the data compression circuit 23 and the signal processing circuit 3 to protect digital data in order to prevent interruption of recording due to disturbance such as vibration, and a data compression circuit. It is provided for the purpose of absorbing the difference between the transfer speed of the digital data output from 23 and the transfer speed of the digital data input to the signal processing circuit 3.

The signal processing circuit 3 modulates the digital data output from the second memory controller 24 to convert it into an RF signal, and transfers the RF signal to the head driving device 26.

The head driving device 26 transfers the RF signal output from the signal processing circuit 3 to the recording head 27, and accurately records the RF signal on a target recording track of the disk 31 by the recording head 27. Thus, the recording head 27 is moved in a direction orthogonal to the recording tracks of the disk 31.

The recording head 27 records an RF signal in a recording area of the disk 31. The recording head 27 records index information in a writing area of the disk 31.

The disk 31 used for the recording and reproduction has a lead-in area in which a disk control signal and the like are recorded in order from the inner peripheral side to the outer peripheral side of the disk, and a plurality of recorded data groups. It has a user TOC area as a writing area for writing information about the data, a program area for recording a plurality of individually completed data groups, and a lead-out area for recording disk control signals and the like.

In the above configuration, when the disk 31 is mounted on the magneto-optical disk device, the optical pickup 1
An RF signal is read from the user TOC area of the disk 31. The RF signal is amplified by the RF amplifier 2, demodulated by the signal processing circuit 3, and subjected to predetermined signal processing to be restored as TOC data, and then stored in a predetermined area of the first memory 5 or the second memory. Is done.

At the time of reproduction, the first memory controller 4 or the second memory controller 24 stores the necessary TOC data in the first memory 5 in response to a request from the system controller 15.
Alternatively, the data is read from a predetermined area of the second memory 25 and transmitted to the system controller 15. Then, the system controller 15 controls the servo control circuit 14 based on the TOC data.

When a disk playback command is issued from the input device 16, the system controller 15 outputs TOC data from the TOC data.
The start signal and the end address of each music piece are recognized, and the RF signal is read out from the program area of the disk 31 by the optical pickup 1 based on the data.
The RF signal is amplified by the RF amplifier 2, demodulated by the signal processing circuit 3 and subjected to predetermined signal processing, restored as digital data, and sent to the first memory controller 4. At this time, the digital data is data that has been compressed on the time axis.

On the other hand, the RF signal amplified by the RF amplifier 2 is also sent to the servo control circuit 14 as a servo control signal used for feedback control. The servo control circuit 14 determines a control amount according to an instruction of the system controller 15 based on the servo control signal, and
3 to output a control signal. Then, the driver circuit 1
3 is a spindle motor 1 according to the magnitude of the control signal.
1, the feed motor 12 and the objective lens driving device of the optical pickup 1 are operated. Thus, the rotation speed of the disk 31 is controlled to a predetermined value, the optical pickup 1 is fed to a target recording track, and the position of an objective lens (not shown) is driven so as to accurately follow the recording track.

The digital data sent to the first memory controller 4 is written to the data area of the first memory 5 and temporarily stored, read out to the first memory controller 4 in the order of writing, and The 1 memory controller 4 detects the amount of digital data stored in the data area of the first memory 5 by monitoring the address of the first memory 5, and detects the amount of digital data in the first memory 5.
When detecting that a predetermined amount has been stored in the memory 5, the detection result is output to the system controller 15.

At this time, the transfer speed differs between the digital data stored in the data area of the first memory 5 and the digital data read from the data area of the first memory 5 by the first memory controller 4. 5
Of the first memory 5 is faster.
Since the data amount of the digital data stored in the data area increases, when the data amount increases to a predetermined amount, the system controller 15
To stop the rotation of the disk 31,
The output of the light beam from the optical pickup 1 is also stopped,
The system controller 15 controls the servo control circuit 14 when the reading of the digital data from the disk 31 is temporarily stopped, and thereafter, when the data amount of the digital data stored in the data area of the first memory 5 decreases to a predetermined amount. Then, the rotation of the disk 31 is restarted, the output of the light beam from the optical pickup 1 is restarted, and the reading of digital data from the disk 31 is restarted.

On the other hand, the digital data output from the first memory controller 4 is sent to a data expansion circuit 6, where it is expanded on a time axis. The digital data that has passed through the data decompression circuit 6 is converted into original analog data by a D / A converter 7, the volume and frequency characteristics are adjusted by a data adjustment circuit 8, and transmitted from an analog output terminal 9 to an output unit (not shown). And output as an audio signal, for example. At this time, if necessary, the data decompression circuit 6
Is sent from the digital output terminal 10 to a data recording device (not shown).

At the time of recording, the first memory controller 4 or the second memory controller 4
The memory controller 24 reads necessary TOC data from a predetermined area of the first memory 5 or the second memory 25 and sends the TOC data to the system controller 15. Then, the system controller 15 controls the servo control circuit 14 based on the TOC data.

When a data recording command is issued from the input device 16, the system controller 15 recognizes the start address and end address of the recordable area RA of the disk 31 based on the TOC data, and records the area based on the recordable area RA. Is selected, the optical pickup 1 and the recording head 27 are sent to a target recording track by the servo circuit 14, the number of revolutions of the disk 31 is controlled to a predetermined value, and the position of the objective lens (not shown) accurately It is driven to follow.

When the analog data is input to an input unit (not shown) and is input to the analog input terminal 18,
This analog data is supplied to A through the data selection circuit 21.
The data is input to the A / D converter 22, converted into digital data by the A / D converter 22, and then sent out to the data compression circuit 23, where it is time-axis compressed at a predetermined compression rate and sent out to the second memory controller 24. The data is temporarily stored in the data area of the second memory 25. Note that digital data is output from a data reproducing device (not shown),
When the data is input to the digital input terminal 19, it is directly sent to the data compression circuit 23 through the data selection circuit 21.

At this time, the second memory controller 24
Detects the amount of digital data stored in the data area of the second memory 25 by monitoring the address of the second memory 25, and stores the digital data in the second memory 25.
, The detection result is output to the system controller 15.

Based on the detection result, the system controller 15 controls the second memory controller 24 to read out the digital data stored in the data area of the second memory 25 in the order in which the digital data was written. The digital data is subjected to modulation and predetermined signal processing by a signal processing circuit 3 to be converted into an RF signal,
The light is sent to the recording head 27 via the optical pickup 6 and is recorded in the program area of the disk 31 by interaction with light from the optical pickup 1.

At this time, the transfer speed differs between the digital data stored in the data area of the second memory 25 and the digital data read from the data area of the second memory 25 by the second memory controller 24. It is faster to read from 25 data areas,
Since the amount of digital data stored in the data area of the memory 25 decreases, when the amount of digital data decreases to a predetermined amount, the system controller 15 controls the memory controller 24 to control the data area of the second memory 25. Stop reading digital data from
The output of the light beam from the optical pickup 1 is also stopped, and the recording in the program area of the disk 31 is stopped. At this time, if analog data or digital data is input from an input unit or a data reproducing device (not shown),
The same operation as described above is repeated, and if analog data or digital data is not input, it is determined that data recording is completed, and the recording operation is stopped.

The above is the basic operation of the magneto-optical disk device. Hereinafter, the operation of the magneto-optical disk device configured as described above when a simultaneous reproduction interrupt is issued during the recording operation will be described with reference to FIGS. This will be described based on the flowchart shown in FIG.

During a recording operation in accordance with the above basic operation, if there is a disk reproduction command from the input device 16 (step S1), the system controller 15 reads out digital data from the second memory 25, and It is determined whether or not the read digital data is being recorded in the program area of the disk 31 by the interaction between the recording head 27 and the light from the optical pickup 1 (step S2). If it is determined that the reading has not been performed, the second memory controller 24 is controlled to start reading digital data from the second memory 25, and the read digital data is transmitted to the recording head 27 and the optical pickup 1. Is recorded in the program area of the disk 31 by the interaction with 3).

At this time, the second memory controller 24
Detects the data amount Y of the digital data stored in the data area of the second memory 25 by monitoring the address of the second memory 25, and detects the data amount Y of the digital data stored in the second memory 25. Is a predetermined amount Y1 (for example,
When it is detected that the number has decreased to the minimum recording unit, the detection result is output to the system controller 15 (step S4).

Then, based on the detection result, the system controller 15 controls the second memory controller 24 to stop reading the digital data from the second memory 25, and the recording head 27 and the light from the optical pickup 1 are stopped. The recording of digital data in the program area of the disk 31 is interrupted by the interaction with (step S5)
At the same time, the start address and the end address of each song are recognized from the TOC data, and the servo control circuit 14 is controlled based on the data to move the optical pickup 1 to a predetermined position in the program area of the disk 31. After that (step S6), the RF signal is read out by the optical pickup 1, and the reproduction of the digital data from the disk 31 is started (step S7), and the data output is started (step S8). Simultaneous processing for simultaneously performing data reproduction is performed.

At this time, the RF signal read by the optical pickup 1 is amplified by the RF amplifier 2, demodulated by the signal processing circuit 3, subjected to predetermined signal processing, and restored as digital data. The digital data is sent to the memory controller 4 and temporarily stored in the first memory 5 and read out in the order in which it was written. The read digital data is sent to the data decompression circuit 6 where the time axis is decompressed. After that, the data is converted into the original analog data by the D / A converter 7, the volume and frequency characteristics are adjusted by the data adjustment circuit 8, and sent out from the analog output terminal 9 to an output unit (not shown), for example, a video signal or an audio signal. Is output as At this time, the digital data that has passed through the data decompression circuit 6 is sent from the digital output terminal 10 to a data recording device (not shown) as necessary.

On the other hand, when the simultaneous processing is started, the first memory controller 4 monitors the data amount X of the digital data stored in the data area of the first memory 5 by monitoring the address of the first memory 5. The detected data amount X of the digital data stored in the first memory 5 is equal to a predetermined amount X
1 (for example, when the memory capacity is full), the detection result is transmitted to the system controller 15.
(Step S11), and the second memory controller 24 also detects the data amount Y of the digital data stored in the data area of the second memory 25 by monitoring the address of the second memory 25, 2 When detecting that the data amount Y of the digital data stored in the memory 25 has increased to a predetermined amount Y2 (for example, half of the memory capacity), the detection result is output to the system controller 15 (step S12). The predetermined amount Y2 is determined by the capacity of the second memory 25, the moving speed of the optical pickup 1, the disk 3
1 is determined by a distance between the data reproduction position and the data recording position on the data storage device 1.

Then, based on the detection result, the system controller 15 controls the servo control circuit 14 to temporarily stop reading digital data from the disk 31 (step S13), and from the TOC data to the recordable area. Recognizing the RA, the servo control circuit 14 is controlled based on the data, and the optical pickup 1
In addition, the digital data is moved to a predetermined position in the first program area (step S14), and the second memory controller 24 is controlled to start reading digital data from the second memory 25.
7 is recorded in the program area of the disk 31 by the interaction of the light from the optical pickup 1 (step S1).
5).

On the other hand, at this time, the second memory controller 24 detects the data amount Y of the digital data stored in the data area of the second memory 25 by monitoring the address of the second memory 25, and When detecting that the data amount Y of the digital data stored in the memory 25 has decreased to the predetermined amount Y1 (for example, the minimum recording unit), the detection result is output to the system controller 15 (step S16), and the first The memory controller 4 detects the data amount X of the digital data stored in the data area of the first memory 5 by monitoring the address of the first memory 5, and detects the data amount X of the digital data stored in the first memory 5. When it is detected that the data amount X has decreased to a predetermined amount X2 (for example, half of the memory capacity), this detection result is sent to the system controller. Outputs 15 (step S1
7).

Then, based on the detection result, the system controller 15 controls the second memory controller 24 to stop reading the digital data from the second memory 25, and the recording head 27 and the light from the optical pickup 1. The recording of the digital data in the program area of the disk 31 is interrupted by the interaction with (step S1)
8) together with the servo control circuit 14 based on the TOC data.
To move the optical pickup 1 to a predetermined position in the program area of the disk 31 (step S1).
9) causing the optical pickup 1 to read out the RF signal,
The reproduction of the digital data from the disk 31 is started (step S20), and thereafter, the above-described simultaneous processing (steps S11 to S10) is performed until the input device 16 issues a disk reproduction stop command or a recording stop command (steps S9 and S10).
Step 20) is repeated.

Therefore, according to the above operation control, for example,
When data input over 30 seconds is recorded on the disk 31 by recording for 6 seconds, and data obtained from the disk 31 by reproduction for 6 seconds is output over 30 seconds, the remaining 18 seconds By switching between the search operation and the laser output of the optical pickup 1, the data recorded on the disk 31 can be changed without stopping the data recording on the disk 31 while the data is being recorded on the disk 31. Because it can be played, for example, when recording a TV program, if you want to watch the TV program from the beginning, or if you are recording a TV program you want to save, This is very effective when the user wants to view a television program recorded on a disc.

In the above operation control, when either the data amount of the digital data recorded in the data area of the first memory 5 or the second memory 25 reaches a predetermined amount, the data recording and the data Switching between reproduction and reproduction is not limited to this, and the data amount of digital data recorded in the data area of the first memory 5 and the second memory 25 is sufficiently ensured, or the optical pickup is If the amount of movement is small and the search does not take a long time, both data recording and data reproduction may be interrupted, and by controlling in this way, energy saving of the apparatus body can be achieved.

In the above operation control, when data recording is performed while data reproduction is interrupted, data is recorded in the recordable area RA based on the TOC data.
It is now possible to save both data being played back and data being recorded.However, the present invention is not limited to this. When data playback is interrupted and data recording is performed, data is overwritten and recorded in the area immediately after playback. By controlling in this way, the moving distance of the optical pickup 1 is reduced, so that the power consumption for the movement can be suppressed. In addition, the search time is shortened and the data recording and the data reproduction are not performed. Since a sufficient time can be taken to interrupt both of them, energy saving of the apparatus main body can be further achieved, and data can be recorded using a disk having a small recordable area RA. Incidentally, such a method of use is, for example, when recording a television program, when the user wants to watch the television program from the beginning, when there is no need to save the recorded television program, This is very effective when the user wants to watch a TV program recorded on the disc on which the program is being recorded while recording the program, and does not need to save the reproduced TV program. .

Further, the optical pickup 1 and the recording head 27
Can be moved separately, and by moving only the optical pickup 1 in the search operation in the simultaneous processing, the power consumption required to move the recording head 27 can be suppressed. In addition to saving energy, the search time can be reduced by providing a sensor or the like for detecting that the positions of the optical pickup 1 and the recording head 27 overlap, thereby shortening the search time. As a result, it is possible to take a sufficient time to interrupt both data recording and data reproduction, and to further save the energy of the apparatus main body.

Next, the operation when a simultaneous recording interrupt is issued during the reproducing operation will be described with reference to the flowcharts shown in FIGS.

During the reproduction operation in accordance with the above basic operation, if there is a disc recording command from the input device 16 (step S21), the system controller 15
By controlling the second memory controller 24, the digital data output from the data compression circuit 23 is started to be stored in the second memory 25 (step S22), and the digital data is read from the program area of the disk 31 by the optical pickup 1. It is determined whether the data is being stored in the first memory (step S23).
If it is determined that the reproduction from the program area is not performed, the RF signal is read by the optical pickup 1 and the reproduction of the digital data from the disk 31 is started (step S24). Until there is a disc playback stop command or a recording stop command (steps S25 and S26), simultaneous processing for simultaneously performing data recording and data playback as shown in FIG. 3 (step S1)
1 to 20) are repeated.

Therefore, according to the above operation control, for example,
When the data obtained from the disk 31 by the reproduction for 6 seconds is output over 30 seconds, and the data input over 30 seconds is recorded on the disk 31 by the recording for 6 seconds, the remaining 18 seconds By switching between the search operation and the laser output of the optical pickup 1, the data can be recorded on the disk 31 without stopping the data reproduction from the disk 31 while the data is being reproduced from the disk 31. For example, when a television program recorded on a disc is being played back even though the user owns only one magneto-optical disc device, the television program to be recorded is broadcast and the television program is broadcasted. Playback cannot be interrupted, or when playing a TV program recorded on a disc. Is broadcast is a sequel of the playing of the TV program, the TV program in the broadcast, is very effective in cases such as when you want to record following the TV program during playback.

Next, an operation for processing data recorded on the disk 31 and recording the data again on the disk 31 will be described with reference to the flowcharts shown in FIGS.

When there is an instruction to edit the data recorded on the disk 31 from the input device 16 (step S31), the system controller 15 determines the contents of the edit instruction, and the edit instruction is recorded on the disk 31. If it is determined that the instruction is to reset various parameters such as data volume and frequency characteristics (step S32), the data selection circuit 21 is controlled to adjust data as data to be supplied to the A / D converter 22. The data output from the circuit 8 is selected (step S33), and when it is determined that the editing command is a command for mixing the data recorded on the disk 31 with the externally input data (step S34). Controls the data selection circuit 21 so that A
The data output from the data mixing circuit 20 is selected as data to be supplied to the / D converter 22 (step S35).

If the editing command determined by the system controller 15 is determined to be another command (such as a data erasing command or a reproducing order changing command),
The operation control according to the command is executed.

When the data selection by the data selection circuit 21 is completed, the system controller 15
The optical pickup 1 is moved to a predetermined position in the program area of the disk 31 by controlling the servo control circuit 14 based on the OC data (step S36), and the optical pickup 1 reads out an RF signal to thereby read the disk. The reproduction of the digital data from the data compression circuit 23 is started at the same time as the reproduction of the digital data from the data compression circuit 23 is started (step S37). The storage in the second memory 25 is started (step S39), and thereafter, data recording and data reproduction are simultaneously performed as shown in FIG. 3 until there is a disc editing stop command from the input device 16 (step S40). The simultaneous processing (steps S11 to S20) is repeated.

Therefore, according to the above operation control, the data obtained from the disk 31 by the reproduction for 6 seconds is output for 30 seconds, and the data input for 30 seconds is recorded on the disk 31 by the recording for 6 seconds. In the case where the data is recorded on the disc 31, the search operation and the switching of the laser output of the optical pickup 1 are performed by the remaining 18 seconds, so that the data reproduced and processed from the disc 31 is processed.
Without stopping reproduction of data from the disk 31,
Since it can be recorded on the disc 31, for example, when the audio data recorded on the disc 31 is obtained by recording from a plurality of sources, when the recording level is fixed, If you want to record a mixture of recorded accompaniment data and singing voice input from a microphone, if you want to post-record audio data on video data recorded on the disc 31,
This is very effective when it is desired to rewrite either the video data or the audio data of the video / audio data recorded in the.

In the simultaneous processing (steps S11 to S20) in the above operation control, if the data reproduction is interrupted and the data recording is performed, the data may be overwritten in the area immediately after the reproduction. In addition to effects such as energy saving of the main body and use of a disk with a small recordable area RA, effects such as elimination of unnecessary work such as erasing unnecessary data can be achieved.

Further, in the above embodiment, the case where the magneto-optical disk is used as the recording medium has been described. However, the present invention is not limited to this, and the recording thin film material may be formed by the heat of the light beam from the optical pickup 1. It goes without saying that a phase-change recording type disk or other recording medium that performs recording by changing between two states, crystalline and amorphous, may be used.

Further, in the above embodiment, FIGS.
Although the system controller 15 storing the control data as shown in FIG.
However, the present invention is not limited to this. Control data as shown in FIGS. 2 to 5 is recorded on a disk 31, and the control data read from the optical pickup 1 by reproducing the disk 31 is used as an apparatus. The data may be stored in the system controller 15 already incorporated as a component of the main body. In such a case, an effect is provided that the existing data recording / reproducing apparatus can be upgraded. At this time, if the data mixing circuit 20 and the data selection circuit 21 do not exist as components of the existing data recording / reproducing apparatus, the control data as shown in FIG. 5 is automatically deleted or cannot be used. It is good to The control data as shown in FIGS. 2 to 5 is not limited to the one recorded on the disk 31 and read out, but may be read out by recording it on an IC card or the like, or it may be read out therefrom by flowing the control data through the Internet. You may do it.

[0081]

As described above, according to the first, fifth, or sixth aspect of the present invention, the data to be recorded on the recording medium and the data reproduced from the recording medium are stored in the memory and recorded. When the recording of compressed data on the medium or the reproduction of compressed data from the recording medium is interrupted, the reproduction of the compressed data from the recording medium or the recording of the compressed data on the recording medium is performed, so that the data Since data can be reproduced from a recording medium during recording or data can be recorded on a recording medium during data reproduction, when data is recorded on the recording medium, the data recorded on the recording medium is deleted. Even when it is necessary to reproduce the data or when reproducing the data from the recording medium, if it is necessary to record the data and the data reproduction cannot be interrupted, the The data recording can be continuously performed without using a data recording / reproducing device or a recording medium, and the recording medium on which the data is recorded is determined because the data recorded on the recording medium has continuity. Even when the operation is performed, complicated operations are not required and editing work does not take a long time, so that operability can be improved and editing work can be shortened.

According to the second aspect of the present invention, the data to be recorded on the recording medium and the data reproduced from the recording medium are stored in the memory, and when the reproduction of the compressed data from the recording medium is interrupted, By recording the data read from the memory in the area of the recording medium where the reproduction of the compressed data has been completed, the data reproduction from the recording medium during the data recording or the data reproduction during the data reproduction can be performed using the recording medium with a small free space. Since data can be recorded on a recording medium, usability can be further improved.

According to the third aspect of the present invention, when reproducing the compressed data from the recording medium, the reproduced data is subjected to a predetermined signal processing, and the data subjected to the signal processing is stored in the memory. By reading the data stored in the memory and recording the data on the recording medium while the reproduction of the compressed data from the recording medium is interrupted,
Since data obtained by performing predetermined signal processing on data recorded on the recording medium can be recorded on the recording medium, audio data is included as data recorded on the recording medium, and the Even if the audio data is obtained by recording from multiple sources, the data after adjusting the volume and frequency characteristics etc. without using multiple data recording / reproducing devices or recording media can be used for the original recording. Even when the recording medium on which the data is to be recorded has been determined because the data recorded on the recording medium has continuity, etc., it is possible to perform complicated operations or edit work. Since it does not require a long time, it is possible to improve operability and shorten editing work.

Further, when the data read from the memory is recorded, if the data is recorded in an area of the recording medium where the reproduction of the compressed data has been completed, the trouble of erasing unnecessary data and the like can be omitted, and the operation can be reduced. It is possible to further improve the performance and shorten the editing work.

According to the fourth aspect of the present invention, when the compressed data is reproduced from the recording medium, the reproduced data is mixed with the data input to the apparatus main body.
The mixed data is stored in the memory, and when the reproduction of the compressed data from the recording medium is interrupted, the data stored in the memory is read out and recorded on the recording medium, thereby being recorded on the recording medium. Since the data obtained by mixing desired data with the existing data can be recorded on the recording medium, it is possible to perform post-recording and the like without using a plurality of data recording / reproducing devices and recording media, Because the data recorded on the recording medium has continuity and so on, even when the recording medium on which the data is to be recorded is decided, there is no need for complicated operations or long time for editing work. Thus, operability can be improved and editing work can be shortened.

Further, when recording the data read from the memory, if the data is recorded in an area of the recording medium where the reproduction of the compressed data has been completed, the trouble of erasing unnecessary data and the like can be omitted, and the operation can be reduced. It is possible to further improve the performance and shorten the editing work.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an electrical configuration of a magneto-optical disk device as an embodiment of a data recording / reproducing device of the present invention.

FIG. 2 is a flowchart showing operation control at the time of data interruption reproduction in the magneto-optical disk device.

FIG. 3 is a flowchart showing operation control when data recording and data reproduction are simultaneously performed in the magneto-optical disk device.

FIG. 4 is a flowchart showing operation control during data interrupt recording in the magneto-optical disk device.

FIG. 5 is a flowchart showing operation control during data editing in the magneto-optical disk device.

[Explanation of symbols]

 Reference Signs List 1 optical pickup 2 RF amplifier 3 encoder / decoder / signal processing circuit 4 first memory controller 5 first memory 6 data expansion circuit 7 D / A converter 8 data adjustment circuit 9 analog output terminal 10 digital output terminal 11 spindle motor 12 feed motor Reference Signs List 13 Driver circuit 14 Servo control circuit 15 System controller 16 Input device 17 Power supply circuit 18 Analog input terminal 19 Digital input terminal 20 Data mixing circuit 21 Data selection circuit 22 A / D converter 23 Data compression circuit 24 Second memory controller 25 Second memory 26 head drive device 27 recording head 31 disk

Claims (6)

[Claims] 1. A method of using compressed data as data to be recorded on a recording medium, and determining a difference in data transfer speed caused by data compression and decompression to store the compressed data on a recording medium while storing the data in a memory. Alternatively, in a data recording / reproducing apparatus that absorbs by intermittently reproducing compressed data from a recording medium, the data to be recorded on the recording medium and the data reproduced from the recording medium are stored in a memory, and the data is compressed into the recording medium. When recording of data or reproduction of compressed data from the recording medium is interrupted, control means for reproducing compressed data from the recording medium or recording compressed data on the recording medium is provided. Data recording and reproducing apparatus. 2. The method according to claim 1, wherein the control unit terminates the reproduction of the compressed data when reading the data stored in the memory and recording the data on the recording medium in a state where the reproduction of the compressed data from the recording medium is suspended. 2. The data recording / reproducing apparatus according to claim 1, wherein data is recorded in the set area. 3. A signal processing means for performing predetermined signal processing on data reproduced from a recording medium, while the control means controls a predetermined signal by the signal processing means when reproducing compressed data from the recording medium. The data processed is stored in a memory, and when the reproduction of the compressed data from the recording medium is interrupted, the data stored in the memory is read out and recorded on the recording medium. The data recording / reproducing apparatus according to claim 1 or 2. 4. A mixing means for mixing data reproduced from a recording medium and data input to the apparatus main body, while the control means controls the mixing means when reproducing compressed data from the recording medium. The data stored in the memory is read out and recorded on the recording medium when reproduction of the compressed data from the recording medium is interrupted when the mixed data is stored in the memory. The data recording / reproducing apparatus according to claim 2. 5. A method of using compressed data as data to be recorded on a recording medium and recording a difference in data transfer speed caused by compression and decompression of data on a recording medium while simultaneously storing the data in a memory. Alternatively, in a data recording / reproducing method of absorbing by intermittently reproducing compressed data from a recording medium, data to be recorded on the recording medium and data reproduced from the recording medium are stored in a memory, and compression to the recording medium is performed. Data recording / reproducing characterized in that when data recording or reproduction of compressed data from a recording medium is interrupted, reproduction of compressed data from the recording medium or recording of compressed data on the recording medium is performed. Method. 6. A step of causing a data recording / reproducing apparatus to intermittently reproduce compressed data recorded on a recording medium and store the compressed data in a memory; and a step of reading compressed data stored in the memory, and expanding and outputting the compressed data. Storing the compressed data to be recorded on the recording medium in the memory; reading the compressed data stored in the memory and intermittently recording the data on the recording medium; and storing the compressed data to be recorded on the recording medium into the memory. While storing and reading compressed data from the memory and continuing output by decompression, while recording of compressed data on the recording medium or reproduction of compressed data from the recording medium is interrupted, the compression of compressed data from the recording medium is stopped. A medium for recording a program comprising a step of reproducing or recording compressed data on the recording medium.