JP3362897B2 - Playback device - Google Patents

Description

Detailed Description of the Invention

[0001]

[Table of Contents] The present invention will be described in the following order. Industrial applications Conventional technology (Figs. 3 to 11) Problems to be Solved by the Invention (FIGS. 3 to 11) Means for Solving the Problems (FIGS. 1 and 2) Action (Figs. 1 and 2) Example (1) Overall configuration of the embodiment (FIG. 1) (2) System controller (Fig. 2) (3) Effects of the embodiment (4) Other embodiments The invention's effect

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reproducing apparatus, and can be applied to a case where continuous audio data is discretely recorded in a predetermined block unit on a magneto-optical disk and the recorded audio data is reproduced.

[0003]

2. Description of the Related Art Conventionally, in a magneto-optical disk device,
Some audio data can be discretely recorded on a magneto-optical disk by recording continuous audio data in a predetermined block unit.

That is, in this magneto-optical disk device, audio data that is sequentially input is input to a voice compression circuit, is converted into blocks at a predetermined cycle, and is subjected to voice compression processing on a block-by-block basis. Called a sound group). Furthermore, in the magneto-optical disk device, for the audio data of this sound group, two consecutive sectors are formed by 11 blocks, and one cluster is formed by 36 sectors, and audio compressed audio data is recorded by this sector. It is designed to be able to record in cluster units based on.

That is, as shown in the form of a table in FIG. 3, in this magneto-optical disk device, there are 23 sectors in each sector.
52 bytes of data can be assigned, and the area represented by the vertical address "0" to "3" is assigned to the header. Further, in the magneto-optical disk device, the area of the vertical address "0" to "2",
Bytes are assigned to a sync pattern (sync), a predetermined sync pattern is assigned to the sync pattern, and the cluster address is recorded at the first and second bytes of the following vertical address "3".

In the magneto-optical disk device, this sector is formed continuously on the magneto-optical disk, and 36 sectors are grouped to form a cluster, and 14 bits are used as an address for cluster management. It is designed to assign the address of. Further, in the magneto-optical disk device, the address of the sector is assigned subsequent to the address of this cluster, and then the mode of the magneto-optical disk is recorded.

Following this header, in the magneto-optical disk device, a main data area of 2336 bytes is formed,
The data desired by the user can be assigned to this area.

That is, as shown in FIG. 4, in the magneto-optical disk for audio, 0 is set as mode data.
Data of 2h is allocated, data of 00h continues for 4 bytes following the header, and audio data is recorded subsequently.

In the magneto-optical disk device, sound groups are assigned to the sectors thus formed, as shown in FIG. That is, in the even-numbered sector, the vertical address "4" corresponding to the table of FIG.
For the main data area following the 00h data,
This main data area is divided in units of the area "105" in the vertical direction address, and sound group data is sequentially allocated to each area.

Further, by dividing the main data area in this way, the area of "53" with the vertical address remaining is assigned to the sixth sound group 5, and the area from the vertical address "5" of the following odd sector is allocated to 6 areas. Record the remaining data for the th sound group 5.

Further, in the magneto-optical disk device, the vertical address of this odd sector is "105".
The remaining areas are divided in units of, and the remaining sound groups are assigned to each area.

As a result, in this type of magneto-optical disk apparatus, audio data that is sequentially input is subjected to voice compression processing to form a sound group, and a sector is formed by this sound group, and a cluster is formed by this sector. Audio data can be recorded in units of this cluster.

That is, when audio data is recorded in cluster units in this way, if a large-capacity memory circuit is used as a buffer memory, for example, when a track jump is caused by vibration during recording, the track jumped cluster is re-recorded. Thus, continuous audio data can be recorded on the magneto-optical disk without interruption.

Further, in the magneto-optical disk device, a recording area for recording management data of audio data is formed on the inner peripheral side of the magneto-optical disk, and the main data composed of the data of this cluster is formed on the outer peripheral side of this recording area. A recording area is formed. As a result, in the magneto-optical disc device, audio data can be sequentially recorded in the main data recording area in cluster units.

On the other hand, in the management data recording area, management data composed of UTOC data is recorded, so that in the magneto-optical disk device, this U data is recorded.
Desired audio data can be reproduced by referring to the TOC data. That is, in the UTOC data, the management data is defined in units of sectors, like the main data, and the first to fourth sectors are standardized.

Of the first to fourth sectors, the second to fourth sectors are defined as options, and the first sector (that is, sector 0) is as shown in FIG. After allocating the address of the cluster following the header, the data of 00h is recorded subsequently. Further, in this first sector, after assigning predetermined code data (Maker code, Model code), data (First Code) indicating the recording start position and the end position of the main data is recorded.
TNO, Last TNO) etc. are assigned.

At the vertical address "11" of the first sector, 2 bytes of disk identification data can be recorded, and then a pointer (P indicating the position of the defective area in the main data recording area is set). -DFA), a pointer (P-) that indicates the start position of the unrecorded area of the main data recording area
EMPTY) is assigned. At the subsequent vertical address "12", a pointer (P-FRA) indicating the start position of the main data recorded in the main data recording area is assigned, and then a pointer (P-FRA) indicating the recording start position of each data (P-FRA) is assigned. TNO1, ..., P-TNO255) are assigned.

Thus, in a magneto-optical disk device for recording / reproducing an audio signal, this pointer (P-FRA
, P-TNO1, ..., P-TNO255), the head position of each song recorded can be detected.

That is, in the area below the subsequent vertical address "76", the start address (Start address) and the end address (End address) representing the recording start position and recording end position of the main data are recorded. Pointer (P-FRA, P-TNO1, ......, P-TNO255)
In the above, the recording position of this start address is designated. As a result, the magneto-optical disc device can detect the recording position of the music designated by the user by detecting the start address and the end address designated by the pointer.

That is, at the start address and the end address, as shown in FIG. 7, the cluster address is recorded in 14 bits, the sector address is recorded in 6 bits, and the sound group address is recorded in 4 bits. As a result, the magneto-optical disc device can perform processing such as cueing of music on a cluster, sector, and sound grape basis for audio data recorded in cluster units. A recording unit designated by this set of start and end addresses is called a part.

Further, in this UTOC data, following this start address, mode data (Track mode) indicating the processing mode of each part is recorded, whereby copy inhibit data, write inhibit data, audio data, stereo data, The monaural data and the like can be identified, and the presence or absence of emphasis processing and the like can be identified.

On the other hand, in the end address,
Next, a link pointer (Link-
P) is recorded, and this link pointer (L
Ink-P), you can specify the recording position of the start address corresponding to this end address. That is, as shown in FIG. 8, when audio data is recorded for the first time on a magneto-optical disk in which no audio data is recorded, the first and second music pieces are successively played in the magneto-optical disk device. Thus, audio data will be recorded (FIG. 8 (A)).

In this case, the audio data of each performance is recorded on the magneto-optical disk with parts P1, P2, P3, ... Designated by a set of start address and end address.

On the other hand, when the performance of the fifth music having a long performance time is recorded after the second music and the fourth music are erased, the continuous audio data is divided into the second music and the second music for the fifth music. It will be recorded in the fourth part P2 and P4. In such a case, in the magneto-optical disk, if the pointer is used to specify the start address of the fifth tune, the second part P2 is specified by this start address.
Of the part P2 can be detected by the end address paired with the start address.

Furthermore, in the magneto-optical disk, the pointer (P-FRA, P-TNO1, ..., P-TNO2) of the fourth part P4 is the link pointer (Link-P) following this end address.
As in 55), the start address can be detected, so that in the magneto-optical disk device, even if the recording / erasing process is repeated, the UTOC is rewritten each time to make the recording area of the magneto-optical disk effective. It is designed to be able to record audio data by using. Thus this allows pointers (P-FRA, P-TNO1,
...... P-TNO255), it is formed corresponding to each performance recorded on the magneto-optical disk, and the corresponding parts are designated together with the link pointer.

On the other hand, in the case where the second piece of the audio data recorded continuously in this way is erased, the head position of the unrecorded area of the main data recording area is represented in the magneto-optical disk device. Pointer (P-EMPTY
) Specifies this erased area. That is, in this pointer (P-EMPTY), pointers (P-FRA, P-
TNO1, ..., P-TNO255), the start address of the corresponding part is designated, so that in the magneto-optical disk device, for example, when the second and fourth songs are erased, the pointer (P -TNO1, P-TNO2, ...
The designation of the parts P2 and P4, which have been respectively designated by (...), indicates the start position of this unrecorded area (P-EM
PTY) and an end address paired with the start address specified by this pointer (Link-P)
It is possible to easily erase the audio data by rewriting it to the designation (FIG. 8 (B)).

As a result, in the magneto-optical disk device, the audio data between the clusters designated by the start address and end address is reproduced in cluster units, and then data processing is performed in sector units, whereby the start address and end address are processed. It is designed to play the performance specified by the sound group address,
As a result, audio data discretely recorded on the magneto-optical disk can be easily reproduced. At this time, in the magneto-optical disk device, by recording the audio data in the cluster unit in this way and reproducing the audio data in the cluster unit, a large-capacity memory circuit is used as a buffer memory as at the time of recording,
Even if a track jump is generated during playback, the track jumped cluster can be played back again to prevent skipping.

By the way, in the second sector (sector 1) among the remaining sectors, as shown in FIG. 9, like the first sector, the header and the pointers (P-TNO1, P-TNO2, ...).
, Etc. are formed, the disk name and the track name can be assigned by the ASCII code corresponding to the start address and the end address. On the other hand, in the third sector (sector 2), as shown in FIG. 10, after the header and the like are formed as in the first sector, the pointers (P-TNO1, P- TNO2, ……)
The pointers (P-TRD1, P-TRD2, ...) Are formed in correspondence with.

As a result, in the third sector (sector 2), pointers (P-TNO1, P-TNO2, ...
For each performance corresponding to ...), the pointer (P-TRD1, P-
TRD2, ……) recording time (Track rec data and time)
Etc. can be recorded. Further, in the fourth sector (sector 4), pointers (P-TNA1, P-TNA2, ...) Are similarly formed as shown in FIG. 11, and the disk name and the track name can be recorded in Kanji code. It is done like this.

[0030]

By the way, in the magneto-optical disk apparatus of this type, by reproducing the audio data in units of clusters in this way, the reproduction speed is increased to intermittently reproduce the audio data. By continuously outputting the reproduced audio data via the large-capacity memory circuit, it is possible to avoid the occurrence of skipping even in the case of a track jump.

In this case, in the magneto-optical disk device,
It takes a maximum of about 1 second until the track is jumped and the original recording track is restored. Therefore, if it is possible to store 1 second of audio data in this type of memory circuit, that amount of time will be generated independently. It is possible to prevent skipping due to the generated track jump. On the other hand, if the capacity of this memory circuit is further increased, skipping of sounds can be avoided even if track jumps occur continuously.

However, in this case, it is necessary to store the reproduced audio data in advance in the memory circuit having a large capacity in units of sectors, and accordingly, the audio data of each sector is expanded and output from any sound group. It is necessary to hold the management data necessary for processing the reproduced audio data in any storage means for each sector. Normally, this kind of management data is stored and held in the buffer memory of the system controller, but if the memory circuit for storing audio data is increased in capacity in this way, this buffer memory must be increased in capacity accordingly. There is a problem that the entire configuration becomes complicated.

Further, if recording and erasing are repeated, a large number of short parts may be formed, and the performance may be recorded over the plurality of parts. In this case, as the number of parts increases, the management data of this kind may be recorded. The recording area of the buffer memory is increased for recording.

The present invention has been made in consideration of the above points, and in the case of reproducing information recorded in a predetermined block unit by using management data, a reproducing apparatus capable of simplifying the entire structure is provided. It is a proposal.

[0035]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, a recording area in which a header is added for each predetermined unit block and the block-recorded record data is recorded, and the block-recorded record data. In the reproducing device 1 for reproducing the recording medium 2 including the management area in which the management data for managing the recording medium is recorded, the management data is reproduced from the management area of the recording medium 2 and the recording data is reproduced from the recording area of the recording medium. Reproducing means 4 to 10 and reproducing means 4 to
Sub data generating means 3 and 12 for generating sub data on the basis of the management data reproduced by 10 and header data in the block recorded data reproduced by the reproducing means 4 to 10. Substitution means 3, 1 for allocating the sub-data generated by the data generation means 3, 12
2 and the memory means 13 for temporarily accumulating the block-shaped recording data to which the sub-data is assigned by the replacing means 3 and 12.

[0036]

[0037]

[0038]

[0039]

If the sub data is generated based on the management data reproduced from the management area of the recording medium 2 and the block-shaped record data to which the sub data is assigned is stored in the memory means 13 instead of the header, the header is stored. It is possible to effectively utilize the recording area for storing the sub data required for the output of each block for each block.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) Overall Configuration of the Embodiment In FIG. 1, reference numeral 1 denotes a magneto-optical disk device as a whole, and when the magneto-optical disk 2 is loaded, UTOC data is read from this magneto-optical disk 2 and then this UTO
A desired audio signal is recorded and reproduced based on the C data.

That is, in the magneto-optical disc device 1, when the magneto-optical disc 2 having a diameter of 64 mm is loaded,
A control signal is sent from the system controller 3 to the servo circuit 4, whereby the servo circuit 4 drives the spindle motor 5, and the magneto-optical disc 2 is rotationally driven at a predetermined rotational speed.

Subsequently, in the magneto-optical disk device 1,
A control signal is output from the system controller 3 to the servo circuit 4 to drive the sled portion 6 to move the optical head 7 to the UTOC recording area of the magneto-optical disk 2. When the optical head 7 is moved in this way, in the magneto-optical disk device 1, the optical head 7 is driven to irradiate the magneto-optical disk 2 with a light beam, and the reflected light is received by the optical head 7.

As a result, the optical head 7 outputs the light reception result to the servo circuit 4 via the RF amplifier 8, whereby the servo circuit 4 controls the tracking and focus control of the optical head 7 based on the light reception result. To do. Further, in the optical head 7, the light reception result is output to the address decoder 9 via the RF amplifier 8, and the address decoder 9 detects the meandering of the pre-groove based on the light reception result and pre-allocates it on the magneto-optical disk 2. The position information of each recorded track thus detected is detected.

As a result, the magneto-optical disk device 1 can record audio data in a desired recording track or reproduce audio data from a desired recording track on the basis of this position information.

In this way, with respect to the recording track in which the UTOC data is recorded based on the position detection result of the address decoder 9, when the recording data can be reproduced,
In the magneto-optical disk device 1, the output signal of the RF amplifier 8 is output to the data processing circuit 10. Here, in the data processing circuit 10, the operation is switched between the recording mode and the reproduction mode, and the RF amplifier 8 is sequentially operated in the reproduction mode.
Is demodulated to obtain demodulated data, and the demodulated data is subjected to error correction processing.

This error correction processing is performed by a CIRC (cross interleaver) recorded in addition to audio data.
eed solomon code) An error correction process is performed based on an error correction code. Therefore, in this type of magneto-optical disk apparatus, the error correction code is added at the time of recording to record audio data and the like. When the data of each sector assigned to the UTOC is reproduced from the UTOC data recording area in this way, in the magneto-optical disk device 1, the memory controller 12 is controlled to generate necessary UTOC data out of the random access memory circuit configuration. Stored in the memory circuit 13.

When the UTOC data is read in this way, in the magneto-optical disk device 1, the key 14
By operating the system controller 3 to monitor the above operation, the user's key operation is detected, the operation is switched in response to the key operation, and the display of the display unit 15 is switched as necessary.

That is, in this embodiment, with the key 14, the power source, eject, reproduction, pause, stop,
Operators such as channel selection and recording are assigned, and in the system controller 3, the entire operation is switched in response to this key operation, and the total playing time of the entire magneto-optical disc 2 is being reproduced through the display unit 15. Elapsed time of playing, remaining playing time of playing, total remaining playing time,
Displays the track number of the performance being played. When the recording date and time of the performance, the disc name, the track name, etc. are recorded on the magneto-optical disc 2, these information are also displayed in response to the user's operation.

On the other hand, when the recording mode is set in response to the user's operation, in the magneto-optical disk device 1, the sequentially input audio signals A1 are sampled by the analog digital conversion circuit (A / D) 16. Frequency 4
After converting to a digital signal of 4.1 [kHz] and 16 bits of quantization bit rate, the voice compression encoder / decoder 17 performs voice compression processing in a predetermined cycle unit, thereby forming a sound group to reduce the data amount to about 1/5. Reduce. In addition, in this audio compression, modified DCT (modified deisc
Reat cosine toransform) is applied to compress audio data.

Further, in the magneto-optical disk device 1,
The audio data DAI is temporarily stored in the memory circuit 13 via the memory controller 12 and then sequentially output to the data processing circuit 10. In the memory circuit 13, a large-capacity memory is allocated so as to store audio data for up to 3 seconds when converted into the audio signal A1.

Here, the data processing circuit 10 uses the memory circuit 13 to divide the sequentially input audio data into a predetermined block to generate an error correction code, and then a modulation method suitable for recording on the magneto-optical disk. (That is, 8-14 modulation, which is EFM modulation), and the resulting recording data is output to the magnetic head drive circuit 18. At this time, in the magneto-optical disk device 1, the optical head 7 and the magnetic head 19 are moved to the unrecorded recording track by driving the sled 6 via the servo circuit 12 based on the UTOC data detected in advance. As a result, in the magneto-optical disk device 1, the magnetic head 19 is driven according to the recording data, and the modulation magnetic field formed by the magnetic head 19 is applied to the desired recording track of the magneto-optical disk 2.

In this state, in the magneto-optical disk apparatus 1, the optical head 7 intermittently irradiates a light beam to the position where the modulation magnetic field is applied, whereby the thermo-magnetic recording method is applied to achieve high-density audio data recording. It is designed to be able to record. Further, in the magneto-optical disk device 1, the reflected light of this light beam is detected by the optical head 7, and the detection result is output to the address decoder 9 through the RF amplifier 8, whereby the address decoder 9
The position information previously recorded in each recording track is detected.
As a result, in the magneto-optical disk device 1, audio data can be sequentially recorded on a desired recording track based on the position information detection result.

At the time of this recording, in the magneto-optical disc device 1, the data processing circuit 10 adds a header to the audio data of the sound group to form a sector, and a cluster is formed in this sector. It is designed to record audio data in cluster units.

As a result, in the magneto-optical disk device 1, a track jump is detected based on the position information detection result obtained from the address decoder 9 and the focus error signal obtained via the optical head 7. Stop the recording operation and return to the original recording track,
Recording of audio data is restarted from this recorded track. At this time, in the magneto-optical disk device 1, the audio data stored in the memory circuit 13 is output again in cluster units.
As a result, the memory circuit 13 can be used as a buffer memory to avoid the loss of audio data, and even if the entire magneto-optical disk device 1 vibrates,
The audio signal can be continuously recorded.

On the other hand, in the reproducing mode, in the magneto-optical disc device 1, the light quantity of the light beam output from the optical head 7 is reduced and the magneto-optical disc 2 obtains the same as in the case of reproducing the UTOC data. The recorded data of the magneto-optical disk 2 is reproduced by utilizing the Kerr effect by detecting the change in the polarization plane of the reflected light. That is, in the magneto-optical disk device 1, the output signal of the RF amplifier 8 is demodulated by the data processing circuit 10 to perform error correction processing and the like, and then output to the memory controller 12.

Here, in the magneto-optical disk device 1,
As in the case of recording, the memory circuit 12 is used as a buffer memory, and the reproduced audio data is output to the audio compression encoder / decoder 17, where audio expansion processing is performed. As a result, in the magneto-optical disk apparatus 1, the audio compression encoder / decoder 17 demodulates the audio data SDO into a digital audio signal AO, and then outputs it in the form of an analog signal via the digital / analog conversion circuit (D / A) 20. It is done like this.

Further, at the time of this reproduction, the magneto-optical disk device 1
In the above, the track jump is detected by monitoring the continuity of the sub data added to the main data. Based on this detection result, the audio data can be recorded in cluster units from the same recording track as needed. It is designed to be played repeatedly. As a result, in the magneto-optical disk device 1, even if a track jump is generated during reproduction, sound interruption can be prevented and the audio signal can be reproduced.

(2) System Controller In the system controller 3, when the audio data output from the data processing circuit 10 is stored in the memory circuit 13 during reproduction, the header of each sector is rewritten, whereby each sector is rewritten. It is designed to assign management data to.

That is, in the system controller 3, when the performance specified by the user is reproduced, the memory circuit 1
By accessing the UTOC data stored in No. 3 (in this embodiment, only the UTOC data of sector 0 is selectively stored), the pointer (P-TNO) selected by the user is accessed.
1, P-TNO2, ...) is detected, the start address and end address designated by the pointer (P-TNO1, P-TNO2, ...) are subsequently detected. Then, in the system controller 3, after moving the optical head to the recording position of the cluster designated by this start address,
The reproduction is started from this cluster, and the reproduction data obtained as a result is processed by the data processing circuit 10.

Further, the system controller 3 detects the sector designated by this start address and outputs the continuous audio data from this sector to the memory controller 12 from the data processing circuit 10 so that the performance designated by the user can be detected. Continuous audio data is sequentially stored in the memory circuit 13 in units of clusters.

Thus, when processing audio data in cluster units, the system controller 3 controls the operations of the servo circuit 4, the data processing circuit 10, and the memory controller 12 according to the cluster address and sector address of the corresponding end address. As a result, audio data of each part is sequentially stored in the memory circuit 13 in units of sectors.

At this time, when the cluster designated by the end address is reproduced, the system controller 3 subsequently determines whether or not there is a start address designated by the link pointer, and if necessary, designates by the link pointer. After accessing the start address, the same processing is executed for the cluster specified by this start address. Further, in the system controller 3, when the last cluster of each part is reproduced, the transmission of data from the data processing circuit 10 is stopped in the sector designated by the end address, and the start designated by the link pointer is started if necessary. For address clusters,
Data transmission is continued from the sector designated by this start address.

At this time, the system controller 3 detects, for each sector, a sound group that starts to be sent to the audio compression encoder decoder 17 and a sound group that stops being sent, and sends the data of this sound group to the memory controller 12. By assigning this data to the header of the corresponding sector.

That is, as shown in FIG. 2, in the system controller 3, the sound group data (start SG) for starting the transmission is assigned to the audio compression encoder / decoder 17 at the first byte of the vertical direction address "0", and the subsequent operation is performed. Audio compression encoder decoder 17 at the 2nd byte
Sound group data (end S
G) is assigned. As a result, in each sector, in the sector assigned to the beginning of the part, the address of the sound group specified by the start address is recorded in this 1st byte, while from the following sector, the first sound is recorded. The address designating the group will be recorded.

On the other hand, in the end SG, after the address designating the 11th sound group is recorded continuously, the sound group designated by the end address is recorded in the sector assigned at the end of the part. The address is recorded.

Further, in the system controller,
In addition to the data of the start SG and the end SG, the data of the track mode (Track mode) defined by the UTOC data of the sector 0 is output to the memory controller 12, and this track mode is set to the third byte following the end SG. Assign to. That is, in this type of magneto-optical disk 2, there are cases where the track mode can be switched for each part. Therefore, when the audio data of each sector is output via the audio compression encoder decoder 17, it is necessary to switch the processing mode. is there.

Therefore, in this embodiment, in addition to the start SG and the end SG, the data of this track mode is also assigned to the header so that the management data necessary for processing the reproduced data is assigned to the header. ing. Further, the system controller 3 outputs the track number data in the performance order designated by the pointer to the memory controller 12, and similarly assigns the track number data to the fourth byte of the header.

Further, in the system controller 12, the recording position of each sector is detected with reference to the start address designated by the pointer, and this recording position is output to the memory controller 12 as the relative position address of the track. Address is vertical address "1"
1 byte and 2 bytes of As a result, in the magneto-optical disk device 1, when outputting audio data from the audio compression encoder decoder 17, the time from the start of playing of audio data being output can be detected with reference to this relative position address. ing.

In this way, the system controller 3 allocates the management data to the header on a sector-by-sector basis, and at the time of transmitting the audio data to the audio compression encoder / decoder 17, it accesses the management data allocated to this header and manages it. The operations of the memory controller 12 and the audio compression encoder / decoder 17 are switched according to the data.

That is, in the system controller, the memory controller 12 is controlled to output the audio data of each sector to the audio compression encoder / decoder 17 on the basis of the sound group designated by the start SG and the end SG, and the track mode is set. The operation of the audio compression encoder / decoder 17 is switched accordingly. Further, in the system control circuit 3, the playing time from the start of playing is calculated based on the relative address of the track in response to the user's operation, and this playing time is displayed together with the track number.

As a result, the magneto-optical disk device 1 stores the management data by effectively using the recording area of the header, and the system controller 3 stores the audio data in the memory circuit 13 no matter how much. It is possible to prevent the work area from decreasing. Therefore, the system controller 3 can control the entire operation by using a memory circuit that is smaller by that amount, and the entire structure of the magneto-optical disk device 1 can be simplified accordingly.

Further, by adding the track relative address to each sector in this way, the correct playing time can be detected for any sector of each cluster, and this detection can be performed by the audio compression encoder decoder 17
By being able to detect when outputting to the memory circuit 13,
No matter how much audio data is stored in, the correct playing time can be detected.

Further, the start SG is set in each sector in this way.
When the audio data is output from the memory controller 12, it is not necessary to switch the processing when the audio data is output from the memory controller 12, and the data necessary for the switching processing is added to the system controller 3 side. Therefore, the entire structure and processing can be simplified.

(3) Effects of the Embodiments According to the above-described structure, the start SG and the end SG are assigned to the header for each sector, and the reproduced audio data is stored in the memory circuit to make the recording area of the header effective. Can be used to store management data,
Therefore, no matter how much audio data is stored in the memory circuit, it is possible to prevent the work area of the system controller from decreasing, and control the entire operation with less memory circuit to simplify the overall configuration. You can

(4) Other Embodiments In the above embodiment, the case where the start SG and the end SG are assigned to the header and the audio data is stored in the memory circuit has been described, but the present invention is not limited to this. The start SG and the number of sound groups to be transmitted may be assigned, and the number of transfer bytes output to the audio compression encoder / decoder may be recorded instead of the number of sound groups.

Further, in the above-mentioned embodiment, the case where the start SG, the end SG, the relative address, etc. are assigned to the header has been described, but the present invention is not limited to this, and the point is that the data accumulated in the memory circuit is output. It is only necessary to record the necessary management data, and various data can be applied as necessary.

Further, in the above-mentioned embodiment, the case of recording audio data has been described, but the present invention is not limited to this, and for example, it is used as an external storage device of a computer to record / reproduce data output from the computer. It can be widely applied to cases.

[0079]

As described above, according to the present invention, when the block-added record data is added with a header for each predetermined unit block and the reproduced record data is stored in the memory means and output. By generating sub-data based on the management data reproduced from the management area of the recording medium and storing the block-recorded data to which the sub-data is assigned in the memory means instead of the header, the recording area of the header is recorded. The sub-data can be effectively used to store the sub-data, so that no matter how much the recorded data that is reproduced is stored in the memory means, the recording area of the buffer memory decreases due to the recording of this kind of management data. This can be effectively avoided, and thus the entire operation can be controlled with a small amount of memory means to obtain a reproducing apparatus having a simple structure as a whole.

[Brief description of drawings]

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

FIG. 2 is a diagram for explaining the processing of the audio data.

FIG. 3 is a diagram for explaining a recording format of main data.

FIG. 4 is a chart showing a case where the main data is audio data.

FIG. 5 is a schematic diagram for explaining a sound group.

FIG. 6 is a diagram provided for explaining a UTOC of sector 0.

FIG. 7 is a schematic diagram for explaining a start address and an end address.

FIG. 8 is a schematic diagram used for explaining parts.

FIG. 9 is a diagram for explaining a UTOC of sector 1.

FIG. 10 is a diagram for explaining a UTOC of sector 2.

FIG. 11 is a diagram for explaining a UTOC of sector 4.

[Explanation of symbols]

1 ... Magneto-optical disk device, 2 ... Magneto-optical disk, 4
...... Servo circuit, 10 …… Data processing circuit, 12 …… Memory controller, 13 …… Memory circuit, 15 …… Display unit, 17 …… Voice compression encoder decoder.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-137843 (JP, A) JP-A-3-263148 (JP, A) JP-A-2-253734 (JP, A) JP-A-2- 23741 (JP, A) JP 2-14619 (JP, A) JP 1-209552 (JP, A) JP 60-52960 (JP, A) JP 57-62676 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) G11B 27/10 G11B 27/00

Claims (5)

(57) [Claims] 1. A header is added for each predetermined unit block.
A recording area in which the blocked recording data is recorded,
Management data that manages the above recorded block data
Playback of a recording medium consisting of a management area in which
In the raw device, the management data is reproduced from the management area of the recording medium.
At the same time, the recording data is recorded from the recording area of the recording medium.
Based on the reproducing means for reproducing and the management data reproduced by the reproducing means.
The sub-data generating means for generating sub-data, and the block data reproduced by the reproducing means.
The sub data generating means is added to the header portion of the recorded data.
A replacement hand that assigns the above sub-data generated by
And the sub-data is assigned by the replacement means.
Memory that temporarily stores the above blocked recorded data
Reproducing apparatus characterized by comprising a means. 2. Generated by the sub data generating means
The sub data is the above recorded block data.
A contract characterized by a recording position in the recording area.
The reproducing apparatus according to claim 1. 3. The sub data generating means generates the sub data.
The sub-data is the block of the recorded data
The re-number according to claim 1, which is a rack number.
Raw equipment. 4. Generated by the sub-data generating means
The sub-data is the block of the recorded data
The rack mode is set according to claim 1.
Playback device. 5. Generated by the sub data generating means
The sub data are Of recorded data
It is the relative position address of the rack Claims characterized by
Item 1. The playback device according to Item 1.