JP3138134B2 - Disk exchange type recording and reproducing apparatus and disk exchange type reproducing apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to multimedia digital data such as a mini-disc (hereinafter simply referred to as "MD"), image, video and computer data using an audio data compression technique called ATRAC system. The present invention relates to a disk exchange type recording / reproducing apparatus and a disk exchange type reproducing apparatus suitable for use in an MD data disk capable of continuous recording and reproduction. This kind of technique can be used not only for MD but also for known disks in general.

[0002]

2. Description of the Related Art As a system for recording / reproducing digital data in a rewritable manner, an MD system of a recording / reproducing digital audio system using a rewritable magneto-optical disk has been commercialized. This MD system is known from Japanese Patent Application Laid-Open No. Hei 4-103079.

This MD system is capable of recording and reproducing on a magneto-optical disk recording medium having a diameter of 64 mm by using an audio data compression technique called ATRAC system. The sound quality is as high as that of an optical disc recording medium, for example, a compact disc (CD), and a single disc can record and reproduce for up to about 75 minutes.

[0004] The operation of the MD system during recording will be described with reference to FIG. FIG. 4 is a block diagram showing a system configuration of a conventional MD player. In FIG. 4, an analog audio signal input by a microphone or the like is first input to an A / D conversion circuit 401, where a sampling frequency of 44.1 kHz and a quantization bit number of 1 are input.
It is converted to 6-bit digital data. Regarding digital audio, digital data similar to that of the A / D conversion circuit 401 can be obtained by the digital audio interface (I / F) 402, and the MD system can support both analog audio input and digital audio input.

[0005] Such digital data is subjected to data compression in a data compression circuit 403 based on the ATRAC system. This data compression is performed by the A / D conversion circuit 401 or the digital audio interface 402 for 44.1k.
The digital data sampled at 1 Hz is defined as two channels of stereo audio (left L / right R) audio data of 512 samples (11.6 msec in one frame length).
Data compression processing is performed for each sound group (1 SG) as a unit (hereinafter simply referred to as “one sound group”). Then, the audio data input in time series is converted into audio data based on frequency components. At the time of this conversion, a so-called audible sound or an inaudible sound that depends on human hearing characteristics is determined,
Only the inaudible sound component is thinned out from the audio data, and the remaining audio data is subjected to data compression according to the ATRAC method.

In this one sound group, the data amount before data compression is 16 bits × 2 channels × 512.
Data of 16384 bits (2048 bytes) is compressed to 424 bytes after data compression.
After data compression, the data transfer rate output from the data compression circuit 403 is 424 bytes / 11.6.
It is output at a transfer rate of msec = 36.6 kbytes (292 kbps).

The audio data thus compressed (hereinafter simply referred to as “compressed data”) is sequentially controlled by the memory controller 404 and sequentially stored in the data memory 40.
5 is stored. As for the data storage capacity of the data memory 405, for example, when it is set to 4M bits,
Since the amount of data transferred from the data compression circuit 403 is 292 kbits per unit time, it is possible to hold about 14 seconds of compressed data. When the memory controller 404 detects that the required data amount has been stored and stored in the data memory 405, the compressed data stored for each sound group is recorded on the magneto-optical disk 409 by the determination of the system controller 417. enter.

Next, the operation of recording and reproducing compressed data on the magneto-optical disk 409 will be described. The compressed data transferred from the data memory 405 is stored in the memory controller 404 in a CD-ROM format (M
After being formatted according to ODE 2), the data modulation circuit 40 is controlled by the system controller 417.
6 is input. The data modulation circuit 406 adds an error correction code to the input compressed data, divides the error-corrected data string into 8 bits, and includes 2 8 combinations of 8 bits. The pattern is composed of another 14 bit combination 2
Convenient 2 out of 14 combinations
Is replaced with a data string constituted by selecting the eighth power.
The so-called EFM modulation is performed. Further, addition of margin bits for an auxiliary purpose and interleaving are performed, and the compressed data is converted into a signal train suitable for recording on the magneto-optical disk 409 to obtain recording data.

On the other hand, in the MD system, a system called a magnetic modulation system is adopted as a data recording system.
In this magnetic modulation system, a magnetic head 408 is provided on the upper side while a magneto-optical disk 409 is sandwiched, and an optical pickup 4 is provided on the lower side.
The magnetic head 408 and the optical pickup 410 always follow so that the output optical axis of the objective lens of the optical pickup 410 coincides with the center of the magnetic pole.

Next, the operation of recording data for recording on the magneto-optical disk 409 will be described. Optical pickup 4
10, the output light power is about 5 mW.
Is irradiated on the magneto-optical disk 409 upward from below. At this time, the compressed data sent from the data modulation circuit 406 is input to the magnetic head driver 407. The magnetic head driver 407 performs an operation of switching the direction of the generated magnetization according to the value of the recording data corresponding to the N pole or the S pole, respectively, according to “0” or “1” of the recording data sent. Therefore, “0” or “1” of the recording data is magnetically recorded on the magnetic film on the upper side of the magneto-optical disk 409 in such a manner as to coincide with the direction of magnetization.

As for the reproduction of the compressed data, the optical pickup 410 irradiates the magneto-optical disk 409 with a weak continuous light of about 0.5 mW, which is weaker than at the time of recording, upward from below. At this time, reflected light of weak light by the optical pickup 410 is emitted from the magneto-optical disk 409. This reflected light generates a so-called magneto-optical effect in which the deflection surface of the reflected light rotates along the direction of magnetization when the magneto-optical disk 409 records the above-described recording data. Therefore, the optical pickup 410 incorporates an optical component called an analyzer that detects the angle at which the deflecting surface of the reflected light rotates, and the analyzer expresses the degree of the angle of the deflecting surface as light intensity. You. Then, an optical sensor incorporated in the optical pickup 410 receives the light detected by the analyzer and converts the light into an electric signal.

The light converted into an electric signal is transmitted to an RF amplifier 41.
2 and converted into recording data. Further, in addition to the data signal detection as described above, the optical pickup 410 is associated with the focus following of the light beam focused on the magneto-optical disk 409 by the objective lens (not shown) of the optical pickup 410 and the detection of the recording position. An error signal for following a recording track is detected. Therefore, the servo control circuit 413 drives the actuator based on this error signal, and the optical pickup 4
10 is moved to the recording position by controlling the feed motor 420 which mechanically moves to the target recording position.

The reflected light detected by the optical pickup 410 at the target recording position is amplified by the RF amplifier 412 and converted into recording data. Then, the data is input to the data demodulation circuit 414, EFM demodulation and error correction are performed, and the data is converted into compressed data. At this time, the addresses sequentially read by the address decoder 411 are output to the memory controller 404. E
The compressed data subjected to the FM demodulation and error correction is temporarily stored in the data memory 405 for each sound group via the memory controller 404, and then the memory controller 404 outputs the data from the data memory 405 storing the compressed data. The compressed data is read out in units of one sound group and transferred to the data decompression circuit 415.
The data decompression circuit 415 to which the compressed data has been transferred performs an operation reverse to the data recording, that is, converts the frequency component data into the original time-series data, and the compressed data is released. Then, the audio is converted into an analog audio signal or a digital audio signal by the D / A conversion circuit 416 or the digital audio interface 402, respectively, and the sound recorded by the acoustic circuit such as a speaker is reproduced.

Next, the characteristic characteristic of the MD system, that is, the vibration resistance characteristic will be described. As described above, at the time of recording, the data compression circuit 403 sends the data memory 4
05 is 292 kbps. Therefore, since the data compression ratio is about 20%, for example, 75%
When a magneto-optical disk 409 capable of recording and reproducing data for about a minute is used, the input audio data is compressed until the data is recorded on the magneto-optical disk 409, or the recorded data is read from the magneto-optical disk 409 and the data is compressed. Until it is released, the actual operation time of each part as described above is only about 20% of the 75 minutes of recording and playback, and the optical pickup 410 is temporarily stopped for the remaining 80% of the time. This is a so-called idle time spent in the stop state or the moving time for moving to the next recording position.

Therefore, if the entire MD system vibrates during recording and the control by the servo control circuit 413 cannot be executed well and the recording fails, the data storage capacity of the data memory 405 is utilized by utilizing such idle time. Until is not saturated, the input audio data is subjected to data compression, and the recording operation on the magneto-optical disk 409 is prioritized while being stored in the data memory 405. By spending time for the system controller 417 executing the control for restarting the recording operation on the magneto-optical disk 409,
Recording can be resumed smoothly and recording is not interrupted. At the time of reproduction, the data decompression circuit 415
The time required for the recording data read from the magneto-optical disk 409 to be reduced to compressed data and stored in the data memory 405 is much faster than the transfer speed 292 kbps of the compressed data transferred to the data memory 405. When the system controller 417 performs control to keep the data always empty, via the memory controller 404, the reproduced sound is not interrupted.

Therefore, in any case of recording and reproduction, vibration-resistant characteristics such that recording and reproduction processing can be smoothly resumed by properly utilizing the data memory 405 and the memory controller 404 against vibrations applied to the system. Have.

[0017]

As described above, in the MD system, the handling of the magneto-optical disk 409 as a recording medium is simple, recording and reproduction can be easily performed, and the electrical characteristics such as sound quality are excellent. Further, the main body of the MD system can be easily handled by having the vibration-resistant characteristics.

However, in the above-mentioned MD system, the magneto-optical disks 409 must be handled independently for each disk, which complicates the magneto-optical disks 409 and causes difficulties in managing them. Furthermore, in order to cope with diversifying multimedia as well as audio, utilizing the high quality characteristics such as digital of the MD system,
There is a need to develop a system capable of recording and reproducing video and computer data. In addition, in such multimedia support, the amount of information held by the medium becomes a problem, and a single magneto-optical disk naturally runs short.

Therefore, a large amount of information can be recorded and reproduced.
In addition, a recording / reproducing system that can handle multimedia is demanded. However, in the aforementioned MD system,
It is impossible to handle multimedia all at once in response to large-capacity information, and it is impossible to handle a plurality of magneto-optical disks easily and automatically.

Therefore, the present invention can record and reproduce or reproduce not only audio but also multimedia information data such as images, videos and computer data, and continuously exchanges a magneto-optical disk for a large amount of information. The first task is to be able to perform continuous recording / reproduction or continuous reproduction,
It is a second object of the present invention to be able to manage a magneto-optical disk for recording / reproducing or reproducing according to a user's purpose.

[0021]

According to a first aspect of the present invention, there is provided a disk exchange type recording / reproducing apparatus for judging an empty area of the data memory when exchanging a disk currently being written, wherein the empty area is equal to or less than a predetermined area. In this case, the number of times of re-recording when the recording is interrupted is set smaller than usual, and the remaining data currently being written is written.

In the disk exchange type recording / reproducing apparatus according to a second aspect of the present invention, similarly, when exchanging a disk currently being written, an empty area of the data memory is determined. In this case, the number of times of re-recording in the event of occurrence is made smaller than usual, and the number of times of re-recording in the case where recording is interrupted until a predetermined empty area is obtained even after disc replacement is smaller than usual.

According to a third aspect of the present invention, there is provided a disk exchange type recording / reproducing apparatus, wherein the recording / reproducing means having the recording mode and the reproducing mode according to the first and second aspects compresses input data and temporarily stores the compressed data in a data memory. The compressed data stored in the data memory is read, the compressed data is converted into recording data, and the disc is written in a recording mode; and the recording data recorded on the disc is read out. A recording / reproducing means for temporarily storing recording data as the compressed data in the data memory, outputting the stored compressed data as necessary, and expanding and outputting the compressed data. Things.

According to a fourth aspect of the present invention, there is provided a disk exchange type recording / reproducing apparatus according to the first to third aspects, wherein a type of information to be recorded and reproduced on a plurality of disks is set and changed according to a user's purpose. Means are added.
The disk exchange type reproducing apparatus according to claim 5 is also provided with:
When replacing the disk currently being read, the empty area of the data memory is determined, and when the empty area is equal to or less than a predetermined value, the number of times of reproduction when the reproduction is interrupted is set smaller than usual, The remaining data is read.

According to a sixth aspect of the present invention, there is provided a disk exchange type reproducing apparatus for exchanging a disk currently being read.
The empty area of the data memory is determined, and when the empty area is equal to or less than a predetermined value, the number of times of reproduction when the reproduction is interrupted is set to be smaller than usual, and the remaining data currently being read is read, and the disc replacement is performed. Thereafter, the number of re-reads when the reproduction is interrupted until a predetermined empty area is obtained is made smaller than usual.

According to a seventh aspect of the present invention, in the disk exchange type reproducing apparatus, the reproducing means having the reproducing mode according to the fifth or sixth aspect reads the recording data recorded on the disk and converts the recording data into compressed data. The reproducing means has a reproducing mode in which the compressed data is temporarily stored in a data memory, the stored compressed data is output as needed, and the compressed data is expanded and output.

[0027]

According to the first aspect, when replacing a disk on which data is currently being written, an empty area of a data memory for temporarily storing input data is determined, and a write time for the empty area is used for disc storage means. When the time difference obtained by subtracting the disk exchange time by the disk exchange means for exchanging the stored disk for reading / writing is less than or equal to a predetermined time, the number of times of re-recording when the recording is interrupted is set smaller than usual; The operation for improving the reliability of the writing is reduced to some extent, and the writing of the remaining data currently being written is ended earlier.

According to a second aspect of the present invention, when replacing a currently written disk, an empty area of a data memory for temporarily storing input data is determined, and a disk storage means is determined based on a writing time for the empty area. When the time difference obtained by subtracting the disk exchange time by the disk exchange means for exchanging the disk stored in the disk for reading / writing is less than or equal to a predetermined time, the number of times of re-recording when the recording is interrupted is made smaller than usual, Reducing the operation for improving the reliability of writing to some extent, ending the writing of the remaining data currently being written early, and re-recording when the recording is interrupted until a predetermined empty area is obtained even after disc replacement Is made smaller than usual, and a predetermined empty area leads to a steady state.

In claim 3, claims 1 and 2
Recording and playback means having a recording mode and a playback mode of
A recording mode for compressing input data and temporarily storing the compressed data in a data memory, reading the compressed data stored in the data memory, converting the compressed data into recording data and writing the data to a disc, The recording data recorded on the disk is read out, the recording data is temporarily stored in the data memory as the compressed data, the stored compressed data is output as necessary, and the compressed data is decompressed. And a playback mode for outputting
This is a recording / reproducing means such as an MD.

In claim 4, claims 1 to 3
In addition, a disk management means for managing a plurality of disks according to the user's purpose, setting and changing information types to be recorded / reproduced on the plurality of disks according to the user's purpose is added, and stored in the disk. An index of information can be provided, and its management becomes easy. According to the fifth aspect, when replacing the disk currently being read, data recorded on the disk is read to determine an empty area of the data memory,
When the time difference obtained by subtracting the disk exchange time by the disk exchange means from the read time for the empty area is equal to or less than a predetermined time, the number of times of reproduction when the reproduction is interrupted is set to be smaller than usual to improve the read reliability. Operation is reduced to some extent, the reading of the remaining data currently being read is terminated early, and the remaining data currently being read is read.

According to a sixth aspect of the present invention, when replacing the disk currently being read, an empty area of the data memory is determined,
When the time difference obtained by subtracting the disk exchange time by the disk exchange means from the read time for the empty area is equal to or less than a predetermined time, the operation for improving the reliability of the read is reduced to some extent, and the remaining data currently being read is read. In this case, the number of times of reproduction in the case where reproduction is interrupted is made smaller than usual when a predetermined empty area is obtained even after disc replacement, and a steady state is established by the predetermined empty area.

In claim 7, claims 5 and 6
Reproducing means having a reproduction mode of, reads the recording data recorded on the disc, temporarily stores the recording data as compressed data in a data memory, and outputs the stored compressed data as necessary, This is a recording / reproducing unit having a reproducing mode for expanding and outputting the compressed data, that is, a so-called MD or other reproducing unit.

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a configuration corresponding to a claim of a disk interchangeable recording / reproducing apparatus according to the present invention. FIG. 2 is a block diagram of the overall configuration of the disk exchange type recording / reproducing apparatus according to one embodiment of the present invention. FIG. 3 is an explanatory diagram showing a memory format for explaining the data memory in FIG.

In FIG. 1, reference numeral 106 denotes disk storage means for storing a plurality of disks. Numeral 103 denotes a disk exchange means for taking out a corresponding disk from a plurality of disks stored by the disk storage means 106 and exchanging it as a disk for recording and reproduction. The disk exchange means 103 includes an automatic disk exchange means 104 for exchanging disks based on its own judgment, and a manual disk exchange means 105 for manually exchanging disks by a user. Reference numeral 102 denotes recording / reproducing means for compressing multimedia data of the media device 101 composed of audio, images, video, and computer onto the disk taken out by the disk exchange means 103, and recording or reproducing the data. Reference numeral 107 denotes a disk management unit for arbitrarily setting individual disks based on a user's management mode, such as a personal computer function, for managing a plurality of disks by the disk storage unit 106.

First, multimedia data (hereinafter, simply referred to as “media data”) such as one or more of audio, image, video, and computer is input to the recording / reproducing means 102 by the media device 101. The recording / reproducing means 102 compresses the input media data and, after adding management information data for managing the media data, performs automatic disc exchange according to the data amount of the media data by the automatic disc exchanging means 104 for exchanging the disc. Then, recording or reproduction is sequentially performed on a plurality of disks, and the plurality of disks are sequentially stored by the disk storage unit 106.

The disk management means 107 can arbitrarily set management information data so that it can be arbitrarily managed and searched according to the user's purpose when recording and reproducing the media data on the disk. The information data is sent to the recording / reproducing means 102, and the management information data is newly written or updated. Then, based on the written or updated management information data, an appropriate disk is selected by the manual disk exchange means 105 and set in the recording / reproduction means 102 to perform recording or reproduction. Therefore, disc management according to the user's purpose can be performed, and media data can be recorded and reproduced by a plurality of media device circuits at a time more efficiently.

The disk storage means 106 of this embodiment
Is a storage box capable of storing at least two or more MDs. The disk exchange means 103 is directly connected to a system controller 205 that controls recording and reproduction of multimedia data such as audio, images, video, and computers. The disk is exchanged to take out the disc and mount it on the recording / reproducing means 102, or take out the disc from the recording / reproducing means 102 and store it in the disc storage means 106.

The memory format in the data memory 203 shown in FIG. 3 is configured as follows. In FIG. 3, the area in which the compressed data is stored is roughly divided into a management information area C and a data area D storing data of the disks A and B. The management information area C contains the disk selection number No. of the corresponding disk. n, the type of media to be recorded, the start and end addresses of media data, and information necessary for disc management such as the capacity of a recordable free area of the corresponding disc. The data area D is an area in which actual compressed data is stored.

Of course, the disc also stores the management information area C and the data area D. Next, FIGS. 2 and 3
The operation of each component will be described with reference to FIG. For example,
The free space of the disk A currently being recorded becomes small,
A case where a change to the next disk B occurs due to a change in storage contents will be described. The system controller 205 changes the writing operation to the other disk B from the recording operation on the disk A. However, since the media data is continuously input, the data compression process is continued, but the compressed data is transmitted to the data modulation / demodulation circuit 206. Should not be forwarded.

Therefore, when the system controller 205 detects a shortage of the writing capacity of the disk A currently being recorded, or detects information on a change in data content from the media data, the disk management means 107 When the change is instructed, the media data is continuously input and the data compression process is continued. Therefore, the system controller 205 instructs the memory controller 204 to store the data in the disk A stored in the free space of the data memory 203. Then, the writing of the compressed data being written is ended, and a disc end flag FAE is added to the end of the disc A stored in the data memory 203 indicating that the disc is to be changed to another disc B. Further, a disc start flag FBS for starting the writing of the next disc B is also given subsequently. When the disk end flag FAE arrives in the writing order of the disk A, the system controller 205 reads the area of the management information area C of the data memory 203, writes it, and instructs the servo control circuit 209 to stop the disk A. Similarly, when the disc end flag FAE arrives in the writing order of the disc A, the disc replacing means 103 removes the disc A currently mounted on the recording / reproducing means 102 in accordance with a command from the system controller 205, and puts the disc in the proper place of the disc storage means 106. Then, based on the disc management information C included in the command from the system controller 205, the next disc B is selected and mounted on the recording / reproducing means 102.

When the disk B taken out from the disk storage means 106 is mounted on the recording / reproducing means 102 by the disk exchange means 103, the system controller 20
5 first searches the management information area C stored on the disk B to recognize information on the disk B. Since the management information area C has a capacity of at least about 4 Kbytes, the management information area C of the disk B is read out and written in the management information area C of the data memory 203. This allows the system controller 20
5 can recognize the information content of the management information area C of the data memory 203 via the memory controller 204 as needed.

That is, when the writing to the data area for the disk A is completed, the management information area C in the data memory 203 is written to the management area necessary for managing the disk A,
Management information data when data is written over a plurality of disks is also written. In this way, when the preparation for resuming recording on the next disk B is completed, the system controller 205
An instruction is issued to start reading compressed data stored in the data memory 203 during disk exchange. Then, in the read compressed data, the disc selection number No. is set with the indication that the disc B is a continuation of the preceding disc A. B and a disc start flag FBS for recording start are instructed to be included in the management information data, the compressed data and the management information are associated, and recording on the disc B is started.

In particular, in the disk exchange type recording / reproducing apparatus such as the MD of the embodiment, analog data and digital data by various media inputted from the outside are compressed by the data compression / decompression circuit 202, for example, ATRAC.
Compressed data using data compression technology based on
The data is temporarily stored in the data memory 203. Then, when the data memory 203 satisfies the required data amount, the stored compressed data is released and converted into a format in accordance with the CD-ROM type MODE2. Further, after the addition of the error correction code, the EFM modulation, and the interleaving, the compressed data digital signal corresponding to “0” or “1” is obtained from the relationship between the continuous light applied to the disk 208 and the magnetic film of the disk 208. Recording is performed so that the magnetization directions of the magnetic film of the disk 208 are N pole and S pole, respectively. Also, the compressed data recorded on the disk 208
8, the angle of the deflecting surface of the reflected light when the disk 208 is irradiated with light is detected, the degree of rotation of the deflecting surface is converted into light intensity, and the light intensity is replaced with an electric signal. Perform processing. The compressed data reduced in this way is stored in the data memory, and when the required amount of data is reached, the compressed data is released by the data compression / decompression circuit 202 and decompression is performed to release the compression. The original analog data and digital data are restored.

Further, the data memory 20 at the time of disk replacement
3 will be described in detail. There is a time difference between the media data input from the outside, the compressed data recorded on the disk 208, and the compressed data stored in the data memory 203 due to the processing time. The maximum value of the time difference depends on the disk exchange speed, and is, for example, the data memory 2 required for compensating the vibration resistance.
If the reserved capacity in 03 is 4 Mbits, a time difference of about 14 seconds may occur. Therefore, the recording operation on the disk 208 is interrupted when the disk exchange command is input, and the compressed data is stored in the data memory 203 so that the recording can be resumed.
When the data is recorded in No. 8, null data is recorded for the time during which the disc is exchanged. In such a case, in the case of a medium that affects time, such as audio and video, sound interruption, dropped frames, and the like occur.

Therefore, when writing to the disk A, the recordable area and the free space of the disk A are detected in advance by the system controller 205 via the memory controller 204 before the start of the recording. Until the condition is satisfied, compressed data accumulated for each predetermined sound group is repeatedly written from the data memory 203, and a normal recording operation is performed. Then, before the free space is completely filled, the system controller 205
The memory controller 204 notifies the end of the compressed data arriving at the data memory 203 with a disk end flag FAE. However, since the media data is continuously input, the data memory 2
Writing of the compressed data to the data 03 is continued. Therefore, a disk start flag FBS for starting writing of the next disk B is also added to the head of the compressed data input from the media data. When the disk end flag FAE arrives at the time of writing the disk A, the system controller 205 reads the area of the management information area C of the data memory 203, and the system controller 205 updates the management information data corresponding to the disk A, and After performing the process of recording on the disk A, the disk A is instructed to stop, and the disk exchange unit 103 removes the disk A currently mounted on the recording / reproducing unit 102 in accordance with a command from the system controller 205, and Then, the next disk B is selected based on the disk management information C included in the instruction of the system controller 205 and is mounted on the recording / reproducing means 102.

When the second disk B is mounted on the recording / reproducing means 102, the management information area C in the disk B is first recognized and the data memory 203 is stored in the same manner as when the disk A is mounted. Write to a predetermined management information area C. Next, the memory controller 204 operates the data memory 2
Resumes reading compressed data from disk 03
Resumes recording in the empty area. Further, when the capacity of the disk is insufficient, or when another command is received, recording is continuously performed while sequentially changing disks according to the above-described procedure, and as a result, the data is stored in the disk storage means 106. Continuous recording can be performed for a time that depends on the number of discs.

However, a disc replacement time of at least several seconds to ten seconds is required from the end of the writing of the disk A to the start of the writing of the disk B after judging the necessity of the disk replacement. This time is secured as follows. First, when the system controller 205 detects a shortage of the write capacity of the disk A currently being recorded, or when information on a change in data content is detected from media data, the disk management unit 107 instructs the disk change from the disk A. Immediately after that, the system controller 205 increases the writing speed of the compressed data from the data memory 203 to the disk A, that is, in this embodiment, increases the frequency of the write clock pulse to perform high-speed writing, and secures the free space of the data memory 203. In addition, the capacity of the data memory 203 required for the disk exchange time is secured. As a result, the disk has a capacity for continuous writing for about 10 to 20 seconds in a normal steady state, so that sufficient time required for disk replacement can be secured by high-speed writing. Incidentally, a data memory 2 which does not employ high-speed writing and can secure a sufficient time required for disk exchange
03 to secure the capacity of the current data memory 203
A capacity larger than the capacity is required. However, there is no need to increase the capacity of the normal data memory 203 by high-speed writing.

However, the free space of the data memory 203 is completely different between when the writing is lost several times due to the vibration and when the writing is performed efficiently without the vibration. The free space is different. Therefore, when the necessity of disk replacement occurs, the current used capacity of the data memory 203 or the data memory 203
By judging whether or not high-speed writing is to be performed based on the determined free space, it is possible to cope with normal processing in which high-speed processing is not performed as much as possible.

In the above embodiment, high-speed writing before disk replacement has been described. More preferably, if the current used capacity of the data memory 203 is reduced by high-speed writing even after disk replacement, the time to enter a steady state is reduced. This can be done quickly, and thereafter, even if vibrations are applied, it is possible to eliminate writing errors of the compressed data. And in this embodiment,
Although the free space of the data memory 203 is secured by high-speed writing, the number of times of rewriting to the disk when vibration is applied is reduced to bring the disk closer to a steady state, and the current used capacity of the data memory 203 is reduced. Even if the number is reduced, the free space of the data memory 203 can be secured. However, when vibration is likely to be applied, the former method is more advantageous than this method. The method of reducing the number of times of rewriting can be implemented instead of high-speed writing.

For continuous reproduction, the recording / reproduction means 102
Knows the contents of the management information when the first disk A is mounted, so it already knows whether the information covers a plurality of disks B. Therefore, after writing all the recorded contents of the disk A to the data memory 203, the system controller 205 searches the next disk B according to the information from the memory controller 204 while the memory controller 204 searches for a free area of the data memory 203. When the conditions for reading are satisfied, an exchange command is issued to the disk exchange means 103 immediately. When it is not at the stage where the next disk B can be read, the compressed data in the data memory 203 is sequentially reproduced and output. The memory controller 204 searches the capacity of the free area of the data memory 203 and sequentially transmits the capacity to the system controller 205, and the system controller 205 determines whether or not the free area is equal to or less than a predetermined amount, thereby performing continuous reproduction.

As described above, at the time of reproduction, by reading the management information of the first disk A at a time, a selection reservation of the next disk B is made in advance based on the included management information, and the data memory 203 is stored. By using the capacity, the reproduction from the next disk B may be resumed after the disk exchange is completed. By utilizing the advantage of the combination of the data memory 203 and the memory controller 204 monitoring the data memory, a plurality of disks can be automatically exchanged continuously, and the compressed data can be reproduced without interruption.

Therefore, in order to continuously perform reproduction, conditions arise in the capacity of the data memory 203 to be used and the method of using the same. That is, the capacity of the data memory 203 is equal to the time difference required from the end of the reproduction of the first disk A to the reproduction of the next disk B, that is, the disk difference, A capacity for storing compressed data being exchanged is required. Therefore, when the time required for disk exchange is about 20 seconds, the transfer speed of the compressed data is 292 kbps, so the compressed data during disk exchange requires about 6 Mbits. In addition, the size of the management information area in the data memory may be different depending on the type of the disc, and it is necessary to secure a fixed maximum size.

On the other hand, the disk exchange type recording / reproducing apparatus of this embodiment has an automatic mode in which the automatic disk exchange means 104 recognizes the management information and automatically exchanges the disk.
The user of the disk manual exchange unit 105 sets disk exchange conditions and the like in advance, and the set contents are adjusted according to the user's purpose in the disk management unit 212 which can be controlled by the system controller 205 and the disk exchange unit 103. There is a manual mode in which the disk can be freely replaced.

Next, a manual disk exchange mode in which arbitrary disk management and disk exchange according to the user's purpose can be performed will be described. Disk management unit 107 shown in FIG.
Receives the management information obtained from the disk from the system controller 205, and displays the management information as a table or characters. Then, the user directly controls the system controller 205 by rewriting as necessary based on the displayed management information or by connecting a personal computer and inputting the intention of the user. Also, the system controller 205
Thus, the memory area of the data memory 203 can be freely changed.

Since the disk management means 107 is characterized in that a plurality of disks are continuously handled in the disk exchange type recording / reproducing apparatus of this embodiment, the disk management means 107 inevitably manages these disks and When recording and reproducing compressed data on a disk, it is necessary to maintain a state in which the apparatus is easily handled by always maintaining a state that is convenient for the user, such as management of the content. For example, the disc "No. 1 ”to“ No. 2 is music, and the disc "No. 3 ”to“ No. 5 "
Records the video on the disc "No. 6 ”to“ N ”
o. No. 7 "can handle all media in a single manner by setting in advance such as computer software. Also, at the time of playback, the playback order of each medium can be determined, and the disc replacement order can be specified, so that the user can freely search for what is recorded on which disc when necessary. .

Also in this case, in order to avoid the recording of the null data, the flag is added at the same time as the disc exchange command. That is, since the media data is continuously input and the data compression process is continued, when the disk management unit 107 instructs the disk replacement, the system controller 205 instructs the memory controller 204 in the free space of the data memory 203. The writing of the compressed data being written to the stored disc A is ended, and a disc end flag FAE is added to the end of the disc A stored in the data memory 203 indicating that the disc is to be changed to another disc B. I do. Further, a disc start flag FBS for starting the writing of the next disc B is also given subsequently. The system controller 205 controls the servo control circuit 20
When the disk end flag FAE arrives in the writing order of the disk A, the area of the management information area C of the data memory 203 is read, written, and the disk A is instructed to stop. Similarly, when the disk end flag FAE arrives in the writing order of the disk A, the disk exchange means 10
3 removes the disk A currently mounted on the recording / reproducing means 102 in accordance with a command from the system controller 205, stores the disk A in an appropriate place in the disk storage means 106,
The next disk B is selected based on the disk management information C included in the command from the system controller 205 and is mounted on the recording / reproducing means 102. The subsequent operation is basically the same as the automatic operation.

Although the present embodiment is based on recording and reproducing data on and from a disk using a data compression technique based on the ATRAC system, it also doubles uncompressed ordinary data in addition to the data compression technique. Alternatively, even in the case of using a system capable of recording and reproducing at a high speed four times or more, an exchange function can be added to a recording and reproducing apparatus equivalent to the embodiment of the present invention.

As described above, in the disk exchange type recording / reproducing apparatus of the above embodiment, the input data is temporarily stored in the data memory 203, and the data stored in the data memory 203 is read out and written on the disk 208. A recording / reproducing circuit 207 having a recording mode for reading data recorded on the disk 208 and temporarily storing the data in the data memory 203 and outputting the stored data as necessary. Means 102 and disk storage means 106 storing a plurality of disks 208
When the disk 208 currently being written is replaced in the disk exchange type recording / reproducing apparatus having the disk exchange means 103 for exchanging the disk stored in the disk storage means 106 with the disk 208 for reading / writing, Disc space means for temporarily storing the read data in the data memory 203, and disc exchange means 103 for exchanging the disc stored in the disc storage means 106 with the read / write disc based on the writing time for the free area. When the time difference obtained by subtracting the disk replacement time is less than or equal to the predetermined time, writing is performed on the currently written disk 208 at a higher speed than the normal recording speed, and the empty area of the data memory 203 is increased so that the disk can be replaced. Get the time you need.

Therefore, the time required for disc exchange can be secured, continuous writing and continuous reading of data can be performed, null data recording / reproduction can be avoided, and not only audio but also multimedia such as images, video and computer data. Information data can be recorded / reproduced, and discs can be continuously exchanged for large-capacity information, and continuous recording / reproduction can be performed.

In the disk exchange type recording / reproducing apparatus of the above embodiment, the recording mode in which the input data is temporarily stored in the data memory 203, and the data stored in the data memory 203 is read out and written into the disk 208 A recording / reproducing means 102 including a recording / reproducing circuit 207 having a reproducing mode for reading data recorded on the disk 208, temporarily storing the data in the data memory 203, and outputting the stored data as necessary, Disk storage means 106 for storing a plurality of disks 208, and disk exchange means 103 for exchanging disks stored in disk storage means 106 with disks 208 for reading / writing.
When replacing the currently written disk 208 in a disk exchange type recording / reproducing apparatus comprising: a vacant area of a data memory for temporarily storing inputted data, Disk exchange means 1 for exchanging a disk stored in storage means 106 with a disk 208 for reading / writing.
When the time difference obtained by subtracting the disc replacement time by the disc 03 is less than or equal to the predetermined time, writing is performed on the currently written disc 208 at a speed higher than the normal recording speed.
The time required for disc replacement is secured by increasing the free area of the data memory 203, and the disc 208 currently being written at a higher speed than the normal recording speed until a predetermined free area is obtained even after disc replacement. Is written, and a steady state is established by a predetermined empty area. This can be regarded as the embodiment of claim 1.

Therefore, the time required for disk exchange can be secured, continuous writing and continuous reading of data can be performed, recording and reproduction of null data can be avoided, and not only audio but also multimedia such as images, video and computer data. Information data can be recorded / reproduced, and discs can be continuously exchanged for large-capacity information, and continuous recording / reproduction can be performed. In addition, after the disk is replaced, a steady state can be quickly entered.

In the disk exchange type recording / reproducing apparatus of the above-described embodiment, the recording mode in which the input data is temporarily stored in the data memory 203, the data stored in the data memory 203 is read out and written on the disk 208 A recording / reproducing means 102 including a recording / reproducing circuit 207 having a reproducing mode for reading data recorded on the disk 208, temporarily storing the data in the data memory 203, and outputting the stored data as necessary, Disk storage means 106 for storing a plurality of disks 208, and disk exchange means 103 for exchanging disks stored in disk storage means 106 with disks 208 for reading / writing.
When replacing the currently written disk 208 in a disk exchange type recording / reproducing apparatus comprising: a vacant area of a data memory for temporarily storing inputted data, Disk exchange means 1 for exchanging a disk stored in storage means 106 with a disk 208 for reading / writing.
When the time difference obtained by subtracting the disc replacement time by the time 03 is less than a predetermined time, the number of times of re-recording when the recording is interrupted is set to be smaller than usual, and the operation for improving the reliability of writing is reduced to some extent. The writing of the remaining data being written is ended early.

Therefore, the time required for disc replacement can be secured, continuous writing and continuous reading of data can be performed, null data recording / reproducing can be avoided, and not only audio but also multimedia such as images, video and computer data can be avoided. Information data can be recorded / reproduced, and discs can be continuously exchanged for large-capacity information, and continuous recording / reproduction can be performed.

In the disk exchange type recording / reproducing apparatus of the above-described embodiment, the recording mode in which the input data is temporarily stored in the data memory 203, the data stored in the data memory 203 is read, and the data is written to the disk 208. A recording / reproducing means 102 including a recording / reproducing circuit 207 having a reproducing mode for reading data recorded on the disk 208, temporarily storing the data in the data memory 203, and outputting the stored data as necessary, Disk storage means 106 for storing a plurality of disks 208, and disk exchange means 103 for exchanging disks stored in disk storage means 106 with disks 208 for reading / writing.
When replacing the currently written disk 208 in a disk exchange type recording / reproducing apparatus comprising: a vacant area of a data memory for temporarily storing inputted data, Disk exchange means 1 for exchanging a disk stored in storage means 106 with a disk 208 for reading / writing.
When the time difference obtained by subtracting the disk replacement time by the disk drive 03 is shorter than a predetermined time, the number of times of re-recording when the recording is interrupted is made smaller than usual, and the operation for improving the write reliability is reduced to some extent. Writing of the remaining data is terminated early, and after disc replacement, the number of re-recordings when recording is interrupted until a predetermined empty area is obtained is made smaller than usual. This can be regarded as the embodiment of claim 2.

Therefore, the time required for disc replacement can be secured, continuous writing and continuous reading of data can be performed, null data recording / reproduction can be avoided, and not only audio but also multimedia such as images, video and computer data. Information data can be recorded / reproduced, and discs can be continuously exchanged for large-capacity information, and continuous recording / reproduction can be performed. In addition, after the disk is replaced, a steady state can be quickly entered.

A recording / reproducing circuit 2 having a recording mode and a reproducing mode in the disk exchange type recording / reproducing apparatus according to any one of claims 1 and 2 of the above embodiment.
The recording / reproducing means 102, such as 07, compresses the input data and temporarily stores it in the data memory 203, reads out the compressed data stored in the data memory 203, and converts the compressed data into recording data. And a recording mode for writing the data to the disk, reading the recording data recorded on the disk 208, temporarily storing the recording data as the compressed data in the data memory 203, and using the stored compressed data. And a recording / reproducing means 102 comprising a recording / reproducing circuit 207 such as a so-called MD having a reproducing mode for outputting the compressed data in accordance with the recording mode. An example could be. In particular, it is recorded and reproduced on a disk using a data compression technique based on the ATRAC method such as MD. Since the data compression technology is used and high-speed recording / reproduction is possible, the control is extremely easy and the effect is remarkable.

In the disk exchange type recording / reproducing apparatus according to any one of the first to third aspects of the present invention, a plurality of disks are managed according to the purpose of the user, and Disk management means 107 for setting and changing the type of information to be recorded and reproduced on a plurality of disks according to the purpose
Can be added, and an index of information to be stored on the disk can be added. Since this can be used as the embodiment of claim 4, the management thereof becomes easy.

In the above-described embodiment, the disk exchange type recording / reproducing apparatus has been described. However, it is needless to say that the disk exchange type recording / reproducing apparatus can be used exclusively for reproduction. The disk exchange type reproducing apparatus of the above embodiment has a reproducing mode having a reproducing mode in which data recorded on the disk 208 is read out, temporarily stored in the data memory 203, and the stored data is output as necessary. Circuit 20
7, a disk storage means 106 for storing a plurality of the disks, and a disk exchange means 103 for exchanging a disk stored in the disk storage means 106 with a disk 208 for reading / writing.
When the currently read disk 208 is replaced in a disk exchange type reproducing apparatus having
8 is read to determine an empty area of the data memory 203. When the time difference obtained by subtracting the disk exchange time by the disk exchange means 103 from the read time for the empty area is equal to or less than a predetermined time, the normal read speed is determined. Data is read from the disk that is currently being read at a higher speed to reduce the vacant area of the data memory 203, thereby obtaining a spare time for disk replacement.

Therefore, the time required for disc replacement can be secured, continuous writing and continuous reading of data can be performed, reproduction of null data can be avoided, and multimedia information such as images, video and computer data as well as audio can be avoided. Data can be reproduced, and continuous reproduction can be performed by continuously exchanging disks even for large-capacity information. In the disc interchangeable reproducing apparatus of the above embodiment, the data recorded on the disc 208 is read out and the data memory 20 is read out.
3, a recording / reproducing means 102 including a recording / reproducing circuit 207 having a reproducing mode for temporarily storing the stored data and outputting the stored data as needed; a disk storing means 106 for storing a plurality of the disks; Storage means 1
When the disk 208 currently being read is replaced in a disk exchange type reproducing apparatus having the disk exchange means 103 for exchanging the disk stored in the disk 06 with the disk 208 for reading / writing, the data recorded on the disk 208 To determine the empty area of the data memory 203, and from the read time for the empty area,
When the time difference obtained by subtracting the disk replacement time by the disk replacement means 106 is equal to or less than a predetermined time, reading is performed on the disk 208 currently being read at a speed higher than the normal reading speed to reduce the empty area of the data memory 203. In advance, a spare time for disk replacement is obtained, and after disk replacement, reading is performed at a speed higher than a normal reading speed until a predetermined empty area is reached, and a steady state is established by a predetermined small empty area. .

Therefore, the time required for disc exchange can be secured, data can be continuously read, null data can be prevented from being reproduced, and not only audio but also multimedia information data such as images, videos and computer data can be reproduced. It is possible to continuously exchange disks for large-capacity information and to perform continuous reproduction. In addition, after the disk is replaced, a steady state can be quickly entered.

In the disk exchange type reproducing apparatus of the above embodiment, a reproducing mode for reading data recorded on the disk 208, temporarily storing the data in the data memory 203, and outputting the stored data as necessary is provided. A recording / reproducing means 102 comprising a recording / reproducing circuit 207, a disk storage means 106 for storing a plurality of said disks, and a disk exchange means for exchanging a disk 208 for reading / writing from / to a disk stored in the disk storage means 106 103, when the currently read disk 208 is replaced, the data recorded on the disk 208 is read to determine the empty area of the data memory 203, and the read time for the empty area is determined. Deducts the disk replacement time by the disk replacement means 103 When the time difference is less than a predetermined time,
The number of times of reproduction when interruption of reproduction occurs is set smaller than usual, the operation for improving the reliability of reading is reduced to some extent, the reading of the remaining data currently being read is terminated early, and the remaining data being read is This is the embodiment of the present invention.

Therefore, it is possible to secure the time required for disc exchange, to enable continuous reading of data, to avoid reproduction of null data, and to reproduce not only audio but also multimedia information data such as images, videos and computer data. It is possible to continuously exchange disks for large-capacity information and to perform continuous reproduction. The disk exchange type reproducing apparatus of the above embodiment has a reproducing mode having a reproducing mode in which data recorded on the disk 208 is read out, temporarily stored in the data memory 203, and the stored data is output as necessary. A recording / reproducing means 102 comprising a circuit 207; a disk storage means 106 for storing a plurality of the disks; and a disk exchange means 103 for exchanging a disk stored in the disk storage means 106 with a disk 208 for reading / writing. In the disk exchange type reproducing apparatus provided, the disk 20 currently being read is
When replacing the disk 8, the data recorded on the disk 208 is read to determine the empty area of the data memory 203, and the time difference obtained by subtracting the disk exchange time by the disk exchange means 103 from the read time for the empty area is equal to or less than a predetermined time. In this case, when the operation for improving the read reliability is reduced to some extent, the reading of the remaining data currently being read is ended early, and the reproduction is interrupted until a predetermined empty area is obtained even after the disk replacement. The number of times of re-recording is made smaller than usual, and a steady state is established by a predetermined empty area. This can be the embodiment of claim 6.

Therefore, the time required for disc replacement can be secured, continuous reading of data can be performed, reproduction of null data can be avoided, and not only audio but also multimedia information data such as images, videos and computer data can be reproduced. It is possible to continuously exchange disks for large-capacity information and to perform continuous reproduction. In addition, after the disk is replaced, a steady state can be quickly entered.

In the disk exchange type reproducing apparatus of the above embodiment, the reproducing means having the reproducing mode of claim 5 or 6 (see the reproducing means in parentheses in FIG. 1) is
8, read the recording data recorded in the data memory 8, temporarily store the recording data as compressed data in the data memory 203, and output the stored compressed data as necessary.
The recording / reproducing unit having a reproducing mode for expanding and outputting the compressed data is a reproducing unit such as a so-called MD, which can be an embodiment of the present invention. In particular, the disk is reproduced using a data compression technique based on the ATRAC method such as MD. Since the data compression technique is used and the reproduction can be performed at a high speed, the control becomes extremely easy and the effect is remarkable.

In the disk exchange type recording / reproducing apparatus of the above embodiment, the recording mode in which the input data is temporarily stored in the data memory 203, and the data stored in the data memory 203 is read out and written on the disk 208. When,
A recording / reproducing circuit 20 having a reproducing mode for reading data recorded on the disk 208, temporarily storing the data in the data memory 203, and outputting the stored data as necessary.
7, a disk storage means 106 storing a plurality of disks 208, and a disk exchange means 1 for exchanging a disk stored in the disk storage means 106 with a disk 208 for reading / writing.
03, when the currently written disk is replaced, a disk end flag FAE at the end of the data of the currently written disk stored in the data memory 203;
Flags are added to both sides of the head of the data to be written to the replaced disk stored in the data memory and the disk start flag FBS.

Therefore, only by monitoring the data output from the data memory 203, the boundary between the end of the data and the head of the data when writing is made clear. By the way, in the above embodiment, the disk end flag FAE
And a disk start flag FBS. When the present invention is implemented, since the boundary of data is clear, only one of the disk end flag FAE and the disk start flag FBS can be used.

Although a magneto-optical disk is used as a recording / reproducing medium in the embodiment of the present invention, a rewritable recording / reproducing medium such as a cassette type magnetic tape or a floppy disk of a computer or the like is also applicable to the present invention. A recording and reproducing medium exchange function equivalent to that of the embodiment can be added.
Then, the management information area C may be fixedly set to the position area of the data memory 203, or may be made to correspond using another memory.

[0078]

As described above, in the disk exchange type recording / reproducing apparatus according to the first aspect, when exchanging the currently written disk, the empty area of the data memory for temporarily storing the input data is used. Judgment was made, and when the time difference obtained by subtracting the disk exchange time by the disk exchange means for exchanging the disk stored in the disk storage means for reading / writing from the write time to the free area is equal to or less than a predetermined time, the recording was interrupted. In this case, the number of times of re-recording is set smaller than usual, the operation for improving the reliability of writing is reduced to some extent, and the writing of the remaining data currently being written can be completed earlier.

Therefore, the time required for disc replacement can be secured, continuous writing and continuous reading of data can be performed, recording and reproduction of null data can be avoided, and not only audio but also multimedia such as images, video and computer data can be avoided. Information data can be recorded / reproduced, and discs can be continuously exchanged for large-capacity information, and continuous recording / reproduction can be performed. In addition, after the disk is replaced, a steady state can be quickly entered.

In the disk exchange type recording / reproducing apparatus according to the second aspect, when exchanging the currently written disk, an empty area of the data memory for temporarily storing input data is determined, and From the writing time,
When the time difference obtained by subtracting the disk exchange time by the disk exchange means for exchanging the disk stored in the disk storage means for reading / writing is not more than a predetermined time,
If the recording is interrupted, reduce the number of re-recordings below normal, reduce the operation to increase the reliability of writing to some extent, finish writing the remaining data currently being written earlier, When the recording is interrupted until a predetermined empty area is obtained, the number of re-recordings is made smaller than usual, and a steady state is established by the predetermined empty area.

Therefore, the time required for disc exchange can be secured, continuous writing and continuous reading of data can be performed, null data recording and reproduction can be avoided, and not only audio but also multimedia such as images, video and computer data can be avoided. Information data can be recorded / reproduced, and discs can be continuously exchanged for large-capacity information, and continuous recording / reproduction can be performed. In addition, after the disk is replaced, a steady state can be quickly entered.

According to a third aspect of the present invention, the recording / reproducing means having the recording mode and the reproducing mode according to the first and second aspects compresses the input data and temporarily stores the data in the data memory. Read the compressed data stored in the data memory, convert the compressed data into recording data and write it to a disk, and read the recording data recorded on the disk, A reproduction mode in which the recording data is temporarily stored in the data memory as the compressed data, the stored compressed data is output as necessary, and the compressed data is expanded and output. And the like.

Therefore, in particular, the disk is recorded and reproduced using a data compression technique based on the ATRAC method such as MD. Since the data compression technique is used and recording and reproduction can be performed at high speed, the control is extremely easy and the effect is remarkable. It is possible to manage the disk according to the user's purpose for recording and reproduction.

According to a fourth aspect of the present invention, in the disk exchange type reproducing apparatus, a plurality of disks are managed in accordance with the purpose of the user, and a plurality of disks are managed in accordance with the purpose of the user. A disk management means for setting and changing the type of information to be recorded / reproduced on the disk can be added, and an index of information to be stored on the disk can be added, thereby facilitating management.

According to a fifth aspect of the present invention, when a currently read disk is replaced, data recorded on the disk is read to determine an empty area of the data memory, and a read time for the empty area is determined. When the time difference obtained by subtracting the disk exchange time by the disk exchange means is equal to or less than a predetermined time, the number of times of reproduction when the reproduction is interrupted is set to be smaller than usual, and the operation for improving the reliability of reading is reduced to some extent. The reading of the remaining data currently being read is terminated early, and the remaining data currently being read is read.

Therefore, the time required for disc replacement can be secured, continuous reading of data can be performed, null data can be prevented from being reproduced, and not only audio but also multimedia information data such as images, videos and computer data can be reproduced. It is possible to continuously exchange disks for large-capacity information and to perform continuous reproduction. In the disk exchange type reproducing apparatus according to claim 6, when exchanging a disk currently being read, data recorded on the disk is read to determine an empty area of the data memory, and the disk is read from the read time for the empty area. When the time difference obtained by subtracting the disk replacement time by the replacement means is equal to or less than a predetermined time, the operation for improving the reliability of reading is reduced to some extent,
End the reading of the remaining data currently being read early,
Even after disc replacement, the number of times of re-recording when reproduction is interrupted until a predetermined empty area is obtained is made smaller than usual, and the predetermined empty area leads to a steady state.

Therefore, the time required for disk exchange can be secured, continuous reading of data can be performed, null data can be prevented from being reproduced, and not only audio but also multimedia information data such as images, videos and computer data can be reproduced. It is possible to continuously exchange disks for large-capacity information and to perform continuous recording and reproduction. In addition, after the disk is replaced, a steady state can be quickly entered.

According to a seventh aspect of the present invention, the reproducing means having the reproducing mode of the fifth or sixth aspect reads the recording data recorded on the disk and converts the recording data into a compressed data. As a recording / reproducing means having a reproduction mode for temporarily storing the compressed data in the data memory, outputting the stored compressed data as necessary, and expanding and outputting the compressed data; It was done.

Therefore, the disk is reproduced using the data compression technology based on the ATRAC system such as MD. Since the data compression technology is used and the reproduction can be performed at a high speed, the control is extremely difficult. It becomes easy and the effect becomes remarkable.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration corresponding to a claim of a disk interchangeable recording / reproducing apparatus according to the present invention.

FIG. 2 is a block diagram of an overall configuration of a disk exchange type recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 3 is an explanatory view showing a memory format for explaining a data memory of the disk exchange type recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 4 is a block diagram showing a system configuration of a conventional MD player.

[Explanation of symbols]

 103 disk exchange means 106 disk storage means 107 disk management means 102 recording / reproduction means (reproduction means) 203 data memory 204 memory controller 205 system controller 208 recording / reproduction medium (disk)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 20/10 G11B 17/22 G11B 27/10

Claims (7)

(57) [Claims] (1) temporarily storing input data in a data memory;
And read the data stored in the data memory.
Recording mode for writing out and writing to disc
The recorded data is read out and stored in the data memory.
Temporarily accumulates and outputs the accumulated data as needed
Recording / reproducing means having a reproducing mode for performing
Disk storage means for storing a plurality of disks;
Read / write the disk stored in the disk storage means.
Disk exchange means for exchanging the
In a recording / reproducing recording / reproducing apparatus, when exchanging a disk currently being written, the data
The empty area of the moly is determined, and the empty area is less than a predetermined value.
When the recording is interrupted, the number of re-recordings
Write less data and write the remaining data currently being written
Disk exchange type recording / reproducing apparatus characterized by performing
Place. 2. Temporarily storing input data in a data memory.
And read the data stored in the data memory.
Recording mode for writing out and writing to disc
The recorded data is read out and stored in the data memory.
Temporarily accumulates and outputs the accumulated data as needed
Recording / reproducing means having a reproducing mode for performing
Disk storage means for storing a plurality of disks;
Read / write the disk stored in the disk storage means.
Disk exchange means for exchanging the
In a recording / reproducing recording / reproducing apparatus, when exchanging a disk currently being written, the data
The empty area of the moly is determined, and the empty area
When the recording is interrupted, the number of re-recordings
The specified empty area after replacing the disk.
If the recording is interrupted until the
Disc replacement type recording reproduction
Raw equipment. 3. The apparatus has the recording mode and the reproducing mode.
The recording / reproducing means compresses the input data and stores the data
Memory and temporarily stored in the data memory
Reads the compressed data and converts the compressed data into recording data.
And writing a recording mode to disk after the conversion, the disc
Read the recording data recorded in the
Data in the data memory temporarily as the compressed data.
And output the stored compressed data as necessary
And a playback mode for expanding and outputting the compressed data.
2. A recording / reproducing means comprising:
A disk exchange type according to any one of claims 2 to 3.
Recording and playback device. 4. A plurality of disks according to a user's purpose.
And record on multiple discs according to the user's purpose
Disk management means for setting and changing the type of information to be reproduced
4. The method according to claim 1, further comprising:
A disc exchange type recording / reproducing apparatus according to any one of the preceding claims. 5. A method for reading data recorded on a disk.
Data is temporarily stored in the data memory, and the stored data is
Playback means for outputting as necessary, and
Disk storage means for storing the disk, and the disk storage means
Replacing a disk stored in a column for reading
Disc exchange type reproducing apparatus having disc exchange means
In replacing the disk currently being read, the data
Judge the empty area of the moly
When the playback is interrupted, the number of playbacks
Set less, and read the remaining data currently being read.
A disc exchange type reproducing apparatus characterized by performing the following. 6. A method for reading data recorded on a disk.
Data is temporarily stored in the data memory, and the stored data is
Playback means for outputting as necessary, and
Disk storage means for storing the disk, and the disk storage means
Replacing a disk stored in a column for reading
Disc exchange type reproducing apparatus having disc exchange means
In replacing the disk currently being read, the data
Judge the empty area of the moly
When the playback is interrupted, the number of
And read the remaining data currently being read.
No, empty area is less than the specified amount even after disk replacement
If the playback is interrupted up to
Disc replacement type reproducing apparatus characterized in that it has been reduced. 7. The reproduction means according to claim 1, wherein
And reading the recording data, the compressed data the recording data
Temporarily stored in the data memory as the
Outputs compressed data as needed and decompresses the compressed data
Recording and playback means having a playback mode for
7. The method according to claim 5, wherein:
Disc replacement type reproduction device according to any one of the above.