JP2002124030A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately perform a track change even when multiple times of track change requirements occur for a short time by making track changes correspondent to each requirement. SOLUTION: Even when management information (U-TOC) writing involving one track change requirement is waited, a third memory means capable of storing track change data corresponding to multiple times of track change requirements can hold the track change data corresponding to the next track change requirement. At a prescribed time point responding to the progress of recording of main data on a recording medium, the management information (U-TOC) can be updated on a second memory corresponding to each track change requirement. Appropriate track segmenting of recording data can be realized even when short tracks are present in terms of time relative to data to be recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a recording apparatus for recording data on a recording medium such as a disk.

[0002]

2. Description of the Related Art For example, recording media such as optical disks, magneto-optical disks, or magnetic tapes for recording audio signals as digital signals are widely used as recording media capable of recording / reproducing music, audio, and the like. Recording devices have been developed in response to this.

[0003] A mini disk (magneto-optical disk), which has become popular in recent years, is described. In a recording / reproducing apparatus corresponding to the mini disk, during reproduction, audio data intermittently read from the disk at a high rate is temporarily stored in a buffer memory. By storing the data and reading it out continuously at a low rate to obtain a reproduction output, a so-called shock proof function is provided. At the time of recording, continuously input audio data is stored in the buffer memory, and is read out from the buffer memory in units of a predetermined amount of data intermittently at a high rate and recorded on a disk.

Further, in a digital recording / reproducing system such as a mini-disc system, TO information is used as management information for controlling data recording and reproducing operations on a recording medium.
C (Table of Contents) is recorded, and the recording / reproducing apparatus reads out the TOC information from a recording medium such as a disc in advance and stores it in a memory, and refers to the TOC information at the time of recording / reproducing operation. Thus, an access operation for recording / reproducing can be executed by grasping a recording position and a reading position.

[0005] In the case of a mini-disc, P-recorded by pits as non-rewritable information is used as TOC information.
There is a TOC (pre-mastered TOC) and a U-TOC (user TOC) that is magneto-optically recorded so as to be rewritten according to recording or erasing of music and the like.
For C, data is first updated in the memory in accordance with recording / erasing, and the U-TOC area on the disk is rewritten with the updated data at a predetermined timing. In the U-TOC, audio data recorded on the disc is managed in units called tracks. One track corresponds to, for example, one piece of music.

[0006]

By the way, when audio data is recorded on a mini disc,
A track change request may be generated at a break point of music or the like in continuously input audio data. For example, in the case of digital dubbing from another recording medium such as a CD, track number information is added to input digital audio data,
Since a change point (track change point) of a track (song) can be grasped based on the track number information, a track change request is issued at that time. Further, even when analog audio data is input, when a user performs a track change operation, a track change request with the data portion input at that timing as a track change point is generated.

When a track change request occurs,
The recorded audio data must be managed so that the track is divided at the track change point according to the request. That is, the U-TOC must be updated so that the track change request related to the recorded data is reflected in the U-TOC. However, in the conventional recording apparatus, the track change request may not be reflected in the U-TOC in some cases, and the recorded audio data may not be correctly divided into tracks. 19 to 2
1, an example of such a state will be described.

FIG. 19 shows processing corresponding to a track change request when a track change request occurs during a recording operation. Basically, when audio data is recorded on a disk, when a track change request is made, the U-TOC stored in the buffer memory is reflected in the U-TOC.
Of the track change information is written to a part of the disk after the audio data up to the track change point is written to the disk, that is, the data portion as one track is written to the disk. It is done at the point of time. The track change request is generated at the timing when a data portion serving as a track change point is input. The input audio data is temporarily stored in a buffer memory and then waited until a predetermined data amount is secured. Since the data is written to the disk, there is a time difference between the timing of the generation of the track change request and the time at which the data portion serving as the track change point is written to the disk. By writing the data up to the data portion serving as the track change point on the disk, the recording of the data constituting one track according to the track change request has been completed on the disk. The update of the TOC must take place after that point. Accordingly, it is inevitable that a time lag occurs between the track change request and the U-TOC update execution in the buffer memory accompanying the track change request, but due to such circumstances, an appropriate track change may not be performed. .

When a track change request is issued in step F201 in FIG. 19, it is checked in step F202 whether or not the writing of U-TOC in the buffer memory is awaited. This write waiting means that the U-TOC writing based on the previous track change request is performed, and the writing of the data up to the track change point to the disk is not completed. It is in the state of being. If the writing is not waiting, the track size and the track mode for the track change request are held in step F203. For example, it is stored in an internal memory of the system controller. The track size is the amount of data up to the track change point of the track currently being recorded on the disk, and the track mode is the track mode (track attribute information) for the next track starting from the track change point.

In this state, in step F204, the process waits for the end of the writing of the track data to the disk, that is, the end of the recording of the data up to the track change point on the disk. This state is the U-TO determined in step F202.
It becomes the C writing standby state. When the writing of the track data to the disk is completed, in step F205, the track mode of the next track is written to the U-TOC in the buffer memory. In step F206, the end address of the track for which recording on the disc has been completed is
The calculated end address is calculated from the track size held in step F203, and the calculated end address is written to the U-TOC as the end address of the track constituted by the data up to the track change point. Further, at this time, since the start address of the next track is the value of the end address + 1, the start address is also written in the U-TOC.

As can be seen from this processing, step F2
Before executing the U-TOC writing of steps 05 and F206, in the period of waiting for the end of writing the data up to the track change point to the disk in step F204, a next track change request is generated. When the processing in FIG. 19 is performed in response to a track change request, it is determined that the apparatus is on standby in step F202, and the track change request is ignored. In other words, the process does not proceed to the processing after step F203 in response to the track change request. Therefore, although the track change request is generated, it is not reflected in the U-TOC, and as a result, the track change is performed. There is no state.

FIGS. 20 and 21 show specific examples of such a state. FIGS. 20A to 20E show audio data input to the recording device and stored in the buffer memory, and audio data read from the buffer memory and recorded on the disk. FIG.
0 (a) indicates a state in which data from the trailing end of the track TK4 to a part of the track TK6 is currently stored in the buffer memory. WP indicates the position of the write pointer with respect to the buffer memory, and RP indicates the position of the read pointer. The buffer memory is used in a so-called ring memory form, and the write pointer WP is incremented from the start address of the buffer memory toward the end address, and returns to the start address after the end address. Data input to the recording device is written to the buffer memory according to the write pointer. Similarly, the read pointer RP is also incremented from the start address of the buffer memory toward the end address, and returns to the start address following the end address. Data is read from the buffer memory according to the read pointer and recorded on the disk. Since the position of the write pointer is controlled so as to always precede the read pointer, the input data is temporarily stored in the buffer memory and then recorded on the disk. .

In FIG. 20A, as indicated by the read pointer RP, the time point at which data in the middle of the track TK5 is currently written on the disk is shown. The data input to the recording device includes a write pointer WP
It is assumed that data has already progressed to the middle of the track TK6 as shown by. Then, at a time immediately before this (when the write pointer WP corresponds to the position of TC1),
It is assumed that a track change request TC1 for separating the tracks TK5 and TK6 has occurred. That is, FIG.
The state shown in FIG. 19A is the track change T in FIG.
After the occurrence of C1 is detected, this corresponds to a point in time when the processing of step F203 is completed and the writing of the data of the track TK5 to the disk is waited for in step F204. At this time, the U stored in the buffer memory (an area different from the area used in the ring memory mode shown in FIG. 20) is used.
-TOC indicates that information as shown in FIG. 21A is recorded. Although the description before the track TK3 is omitted, that is, before the current track change,
In the processing of steps F205 and F206 in FIG. 19 in response to the track change requests of the tracks TK4 and TK5, the end address EA4 is recorded for the track TK4 (the start address SA4 of the track TK4 and the track mode md4 are recorded at a further earlier time). The start address SA5 and the track mode md5 are recorded for the track TK5. Further, in the process of step F203 according to the track change request TC1, for example, the data size SZ5 for the track TK5 and the track mode md6 of the track TK6 are held as track change data in a memory in the system controller.

Thereafter, it is assumed that the time has advanced to reach the state shown in FIG. At this time, the writing of the data of the track TK5 to the disk has not been completed yet, and it is a point in time when the process waits in step F204. That is, it is assumed that the U-TOC writing for the track change request TC1 has not been performed yet, but a track change request TC2 for further dividing the tracks TK6 and TK7 has occurred.
As described above, in the process of FIG. 19 for the track change request TC2, since the U-TOC writing corresponding to the track change request TC1 is on standby, the process proceeds to step F20.
2 ignored.

After that, when the state shown in FIG. 20C is reached, the writing of the data of the track TK5 to the disk has been completed, so that the processing for the track change request TC1 proceeds to steps F205 and F206, and the U-TOC
Writing is performed. That is, as shown in FIG. 21B, the end address EA5 of the track TK5 is calculated using the data size SZ5 held as the track change data, written into the U-TOC, and
The start address SA6 of the track TK6 is written as the value of the end address EA5 + 1. The track mode md6 of the track TK6 held as track change data is also written. The track change data becomes unnecessary at this point, and when a track change request is generated thereafter, the track change data is held in the process of step F203.

Thereafter, the recording operation further proceeds.
Since the track change request TC2 was ignored, FIG.
As shown in FIGS. 0 (d) and (e), data to be used as the track TK7 is recorded on the disc as the track TK6. That is, at the time of FIG.
-TOC remains in the state shown in FIG. 21B in which the track change request TC2 is not reflected, so that the track T
Recording of the data of K7 is continued as data of the track TK6, and the data is not managed as the track TK7.

As can be seen from this example, the track change request is not reflected when the track change request occurs at the time when the U-TOC writing for the previous track change request has not been performed. That is, there is a case where there is a next track change request during the time lag from the input of audio data to the writing to the disc. The time lag is controlled by controlling the read pointer RP of the buffer memory so that the buffer memory does not overflow, for example, for several seconds to several tens of seconds. However, if one track is as short as several seconds, for example, the situation shown in FIG. 20 may occur. For example, in audio data for language learning, for example, tracks are often divided into units of one sentence, such as conversation, so that each track is about several seconds in length in many cases. When such a sound source is recorded on a disk, each track is managed in a state where it is not correctly divided.

[0018]

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to prevent a situation where a track change request is ignored and recorded data is not properly divided into tracks. .

For this reason, according to the present invention, in a recording apparatus for recording a recording medium on which main data and management information for managing the main data in track units are written and read for writing and reading data to and from the recording medium Means, first memory means for temporarily storing main data input for recording on a recording medium by the writing and reading means, and management information read from the recording medium by the writing and reading means. Second memory means for storing, and main data input during the recording operation, wherein the main data input is continuously stored in the first memory means and intermittently read from the first memory means. Control means for controlling the recording and reading means to record the data on a recording medium; and track change data associated with a track change request generated during a recording operation. And the third memory means capable of responding to a plurality of track change requests, and the third memory means at a timing corresponding to the progress of recording of main data on a recording medium by the write / read means. Updating means for updating the management information stored in the second memory means based on the track change data stored in the memory means;
At a predetermined point in time after the end of the recording operation, a management information writing control means for writing the management information stored in the second memory to a recording medium by the writing and reading means is provided. Further, a predetermined area in the management information stored in the second memory means is used as the third memory means. The first and second memory means are realized as different memory areas in one memory element.

That is, according to the present invention, the third memory means capable of storing track change data in response to a plurality of track change requests allows the track change data relating to the track change request to be stored. Even when waiting for writing of management information (U-TOC) for one track change request, track change data can be held in response to the next track change request, and reflected in the management information later. In addition, an appropriate track division is realized for the recording data.

[0021]

Embodiments of the present invention will be described below. An example of this embodiment is a recording / reproducing apparatus capable of performing a recording / reproducing operation using a magneto-optical disk (mini disk) as a recording medium. The embodiments will be described in the following order. 1. 1. Configuration of recording / reproducing device 2. Minidisk cluster structure 3. Mini disc area structure U-TOC5. Processing when a truck change is requested

1. Configuration of Recording / Reproducing Apparatus The configuration of the mini-disc recording / reproducing apparatus 1 of this example will be described with reference to FIG. A magneto-optical disk (mini disk) 90 on which audio data is recorded is driven to rotate by the spindle motor 2. The disk 90 is irradiated with laser light by the optical head 3 during recording / reproduction.

The optical head 3 performs a high-level laser output for heating a recording track to the Curie temperature during recording, and a relatively low-level laser for detecting data from reflected light by a magnetic Kerr effect during reproduction. Perform output. For this reason, the optical head 3 is equipped with a laser diode as a laser output unit, an optical system including a polarization beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens 3a is held by a two-axis mechanism 4 so as to be displaceable in a radial direction of the disk and in a direction of coming into contact with and separating from the disk.

The optical head 3 with the disk 90 interposed therebetween
The magnetic head 6a is disposed at a position facing the head. The magnetic head 6a performs an operation of applying a magnetic field modulated by the supplied data to the magneto-optical disk 90. The entire optical head 3 and the magnetic head 6a can be moved in the disk radial direction by the thread mechanism 5.

The information detected from the disk 90 by the optical head 3 by the reproducing operation is supplied to the RF amplifier 7. The RF amplifier 7 performs an arithmetic operation on the supplied information to reproduce the RF signal, the tracking error signal TE, the focus error signal FE, and groove information (absolute position information recorded as a pre-groove (wobbling groove) on the magneto-optical disk 90). GFM and the like are extracted. The extracted reproduced RF signal is supplied to the encoder / decoder section 8. Further, the tracking error signal TE and the focus error signal FE are supplied to the servo circuit 9, and the groove information GFM is supplied to the address decoder 10.

The servo circuit 9 is provided with the supplied tracking error signal TE and focus error signal FE, and the system controller 1 composed of a microcomputer.
Various servo drive signals are generated based on a track jump command, an access command, rotation speed detection information of the spindle motor 2 and the like from the controller 1 to control the two-axis mechanism 4 and the thread mechanism 5 to perform focus and tracking control. 2 is controlled to a constant linear velocity (CLV).

The address decoder 10 decodes the supplied groove information GFM to extract address information.
This address information is supplied to the system controller 11 and used for various control operations. The reproduced RF signal is subjected to decoding processing such as EFM demodulation and CIRC in the encoder / decoder section 8. At this time, addresses, subcode data, and the like are also extracted and supplied to the system controller 11.

EFM demodulation in the encoder / decoder section 8
The decoded audio data (sector data) such as CIRC is temporarily written into the buffer memory 13 by the memory controller 12. The reading of data from the disk 90 by the optical head 3 and the transfer of reproduced data in the system from the optical head 3 to the buffer memory 13 are at 1.41 Mbit / sec, and are usually performed intermittently.

The data written in the buffer memory 13 is read out at a timing when the transfer of the reproduction data becomes 0.3 Mbit / sec, and is supplied to the encoder / decoder section 14. Then, reproduction signal processing such as decoding processing for the audio compression processing is performed, and 44.1 KHZ sampling,
The digital audio signal is a 16-bit quantized digital audio signal.
This digital audio signal is converted into an analog signal by the D / A converter 15, and the output processing unit 16 performs level adjustment, impedance adjustment, and the like, and outputs the signal to the line output terminal 1.
7 is output to an external device as an analog audio signal Aout or supplied to headphones connected to the terminal unit 27 as a headphone output HPout.

The digital audio signal decoded by the encoder / decoder section 14 is supplied to the digital interface section 22 so that the digital audio signal can be output from the digital output terminal 21 to an external device as a digital audio signal Dout. . For example, the data is output to an external device in a transmission form using an optical cable.

As the buffer memory 13, for example, 4 Mbi
A storage capacity of t, 16 Mbi, or the like is used, and reproduction data is temporarily stored and read out to function as a shock-proof memory. That is, for example, 4
In the case of Mbit storage capacity, when full capacity data is accumulated,
Audio data corresponding to about 10 seconds is stored, and during this time, reproduced audio can be output without reading data by the optical head 3. Therefore, even if the optical head loses tracking or jumps a large track due to disturbance or the like and cannot read data, it is possible to access the original position while the data is being output from the buffer memory 13 and access the disk. If the data reading from 1 is restarted, the audio output will not be interrupted.

When a recording operation is performed on the magneto-optical disk 90, the recording signal (analog audio signal Ain) supplied to the line input terminal 18 is converted into digital data by the A / D converter 19. Thereafter, the data is supplied to the encoder / decoder unit 14 and subjected to audio compression encoding processing. Or from a digital input terminal 20
Is supplied with the digital audio signal Din,
The digital interface unit 22 extracts control codes and the like, and the audio data is supplied to the encoder / decoder unit 14 and subjected to audio compression encoding processing. Although not shown, it is naturally possible to provide a microphone input terminal and use the microphone input as a recording signal. When a digital audio signal Din is supplied to the digital input terminal 20,
Along with the digital audio data, track number information, subcode information, track attribute information, and other control information are also sent in a predetermined format. These pieces of information are taken into the system controller 11 and used for various recording processes and a process for a track change request described later.

The recording data compressed by the encoder / decoder section 14 is once written and accumulated in the buffer memory 13 by the memory controller 12, and then read out for each predetermined amount of data unit.
It is sent to the decoder section 8. After being subjected to encoding processing such as CIRC encoding and EFM modulation by the encoder / decoder section 8, the encoded data is supplied to the magnetic head drive circuit 6.

The magnetic head drive circuit 6 supplies a magnetic head drive signal to the magnetic head 6a in accordance with the encoded recording data. That is, the magnetic head 6a applies the N or S magnetic field to the magneto-optical disk 90. At this time, the system controller 11 supplies a control signal to the optical head so as to output a laser beam at a recording level.

During this recording operation, the encoder /
Writing of the recording data compressed by the decoder unit 14 to the buffer memory 13 is continuously performed at a transfer rate of 0.3 Mbit / sec, while reading from the buffer memory 13 is performed at 1.41 Mbit / sec. Performed intermittently at the transfer rate. In particular, in the case of a mini-disc system, the recording operation is performed using a unit called a cluster, which will be described later, as a minimum data unit. . In addition, even during the recording, the data is temporarily stored in the buffer memory 13, so that even if the recording operation on the disk 90 is temporarily disturbed due to disturbance or the like, it is necessary to retry the recording again. In that sense, it also has a shock proof function at the time of recording.

The operation section 23 is provided with various operation keys for the user to instruct recording / reproducing / editing operations and the like. Specifically, play key, record key, stop key,
A record key, an AMS / search key, a pause key, an edit mode key, an edit operation key, a display mode key, etc. are provided.
In addition, operators and the like for inputting information are provided. Editing operations include track name input, disc name input, track division, track concatenation, track movement (change of track number as a playback order), track erasure, and the like. Necessary controls are provided. Further, there are provided operators for inputting characters as track names and disc names. If a user wants to divide a track at an arbitrary timing during a recording operation, a key for a track change operation for instructing the division is also provided. In addition, a remote commander may be prepared as an operation unit, and the same various operations may be performed by the remote commander.

Operation information from the operation keys and dials of the operation unit 23 is supplied to the system controller 11, and the system controller 11 executes operation control according to the operation information.

The display section 24 is provided, for example, on a device housing.
1 is controlled. That is, the system controller 11
Transmits data to be displayed to the display driver in the display unit 24 when the display operation is performed. The display driver drives a display such as a liquid crystal panel on the basis of the supplied data to execute display of required numbers, characters, symbols, and the like.

The system controller 11 is a microcomputer having a CPU, a program ROM, a work RAM, an interface, and the like, and controls the various operations described above.

When recording / reproducing operations are performed on the disk 90, management information recorded on the disk 90, that is, P-TOC (premastered TOC),
It is necessary to read U-TOC (user TOC).
The system controller 11 determines the address of the area to be recorded on the disc 90 and the address of the area to be reproduced on the disk 90 according to the management information. This management information is held in the buffer memory 13. Then, when the disk 90 is loaded, the system controller 11 reads out the management information by executing a reproduction operation on the innermost side of the disk on which the management information is recorded, and stores the information in the buffer memory 13. Thereafter, it can be referred to at the time of recording / reproducing / editing operation on the disc 90.

For example, when attempting to record a certain music, a U-TOC (TOC information area which is rewritten in response to recording, erasing, etc. of an audio signal) which is a part of the TOC information
To find an unrecorded area on the disc and record audio data there. At the time of reproduction, the area in which the music to be reproduced is recorded is determined from the TOC information, and the reproduction operation is performed by accessing the area.

Further, when music or the like is recorded on the disk 1, the U-TOC is updated in the buffer memory 13 in accordance with the recording operation, and at a predetermined timing after the recording is completed (for example, immediately after the recording is completed, The U-TOC data is read from the buffer memory 13 and written to the disk 1 when the disk is ejected or when the power is turned off. Thus, the U-TOC in the disc 1
, The recorded music or the like can be reproduced thereafter. During a recording operation, when a track change request described later is issued, the process corresponding to the U-T corresponding to the track change request is performed.
The writing of the OC data is performed on the U-TOC held on the buffer memory 13.

The buffer memory 13 stores the recording / reproducing audio data compressed in the ATRAC format at the time of recording / reproducing on the disk 90 as described above, and also holds the TOC information read from the disk 90. . To be used in this manner, the buffer memory 13 has, for example, an area configuration as shown in FIG.

The buffer memory 13 has, for example, 4 Mbits,
16-Mbit D-RAM or multiple D-RAMs
It is constituted by. As shown in FIG. 2, a TOC area for storing TOC information, a work area accessible only by a command from the system controller,
Each area is set as a compressed audio data area for storing recording and reproduction data and a reserved area.

The compressed audio data area is used as a buffering area for the above-mentioned shock proof, and this area is used in the form of a ring memory. That is, the read pointer RP,
As the write pointer WP is sequentially updated as shown by the dashed arrow, the recording data and the reproduction data are held in the form of a ring memory. At the time of reproduction from the disk 90, data read out from the disk 90 intermittently is written into the buffer memory 13 by the write pointer WP, and the data is updated continuously by the read pointer RP.
It is read out at a transfer rate of 0.3 Mbit / sec and reproduced and output. At the time of recording on the disc 90, the write pointer W
P is continuously updated, and data input at a transfer rate of 0.3 Mbit / sec and subjected to ATRAC compression processing is written to the buffer memory 13. And the read pointer RP
Thus, for example, data is read in units of one cluster, and is provided for recording processing on the disk 90.

As for the TOC area, necessary TOC sectors for the disk 90 are stored after the disk 90 is loaded.
Update processing for sectors 0, 1, 2, and 4 is performed once in this TOC area. Then, the TOC information stored (updated) in the TOC area at a predetermined time is written to the disc 90. That is, the U-TOC update on the disk 90 is performed.

2. Here, a data unit called a cluster will be described.
In the mini-disc system, a data stream for each unit of one cluster is formed as recording data. The format of a cluster as a unit of this recording operation is shown in FIG. As shown in FIG. 3, clusters CL are continuously formed as recording tracks in the mini disc system, and one cluster is the minimum unit for recording. One cluster corresponds to two or three tracks, and the actual reproduction time is a data amount of 2.043 seconds.

One cluster CL is composed of the sector SCFC
To SCFE, a sub data sector of one sector indicated as sector SCFF, and a main sector of 32 sectors indicated as sectors SC00 to SC1F. That is, one cluster is composed of 36 sectors. One sector is 235
This is a data unit formed of 2 bytes.

The linking sectors SCFC to SCFE are used for a buffer area as a break of a recording operation, various operation adjustments, and the like, and the sub data sector SCFF can be used for recording information set as sub data. Recording of TOC data, audio data, and the like is performed in main sectors SC00 to SC1F of 32 sectors.

The sectors are further subdivided into units called sound groups, and two sectors are divided into 11 sound groups. That is, as shown in the figure, the sound groups SG00 to SG0A are included in two consecutive sectors including an even sector such as the sector SC00 and an odd sector such as the sector SC01.
One sound group is formed of 424 bytes, and has a sound data amount corresponding to a time of 11.61 msec.
In one sound group SG, data is recorded while being divided into an L channel and an R channel. For example, the sound group SG00 includes L channel data L0 and R channel data R0.
G01 is L channel data L1 and R channel data R
It is composed of 1. Note that the 212 bytes that are the data area of the L channel or the R channel are called a sound frame.

3. Area Structure of Mini Disc The area structure of the disc 90 of this example will be described with reference to FIG. FIG. 4A shows an area from the innermost side to the outermost side of the disk. Disk 90 as magneto-optical disk
Is a pit area on the innermost side where reproduction-only data is formed by embossed pits.
C is recorded. The outer periphery of the pit area is a magneto-optical area, which is a recordable / reproducible area in which a groove is formed as a guide groove for a recording track. The section from cluster 0 to cluster 49 on the innermost side of the magneto-optical area is used as a management area, and actual songs and the like are recorded as one track each from clusters 50 to 22.
There are up to 51 program areas. The periphery of the program area is a lead-out area.

FIG. 4 shows the inside of the management area in detail.
(B). FIG. 4B shows sectors in the horizontal direction and clusters in the vertical direction. In the management area, clusters 0 and 1 are buffer areas with the pit area. The cluster 2 is a power calibration area PCA and is used for adjusting the output power of the laser beam. For clusters 3, 4, and 5, U-TOC is recorded. U
Although details of the contents of the TOC will be described later, each of the 32 main sectors (SC00 to SC1) in one cluster
In F), a data format is defined, and predetermined management information is recorded. That is, the address of each track and the address of a free area recorded in the program area are recorded.
-A TOC sector is defined. Such U-T
Clusters having sectors serving as OC data are repeatedly recorded three times in clusters 3, 4, and 5. Cluster 4
7, 48 and 49 are buffer areas with the program area.

In the program area after the cluster 50 (= 32h in hexadecimal notation), in each of the 32 main sectors (SC00 to SC1F) in one cluster, audio data such as music is compressed in a compression format called ATRAC. Be recorded. Each recorded program and recordable area are
Managed by U-TOC. In each cluster in the program area, the sector SCFF can be used for recording information as sub-data as described above.

4. U-TOC As described above, in order to perform the recording / reproducing operation of the program (track) on the disk 90, the system controller 11 requires the P-TOC, U -Read out the TOC and refer to it when necessary. Here, disk 9
The U-TOC sector will be described as management information for managing the recording / reproducing operation of a track (music or the like) at 0.

The P-TOC is formed in the innermost pit area of the disk 90 as described with reference to FIG. 4, and is read-only information. The P-TOC manages the position of a recordable area (recordable user area) of the disc, a lead-out area, a U-TOC area, and the like. In a read-only optical disk in which all data is recorded in a pit form,
The P-TOC can also manage music recorded in the form of a ROM and the U-TOC is not formed. Detailed description of P-TOC is omitted.

FIG. 5 shows the format of U-TOC sector 0. Note that the U-TOC sector can be provided from sector 0 to sector 32.
That is, the main sectors SC00 to SC in one cluster described above.
This is a sector recorded corresponding to C1F. inside that,
Sector 1 and sector 4 are character information, and sector 2 is an area for recording the recording date and time. Descriptions of these sectors 1, 2, and 4 will be omitted.

The U-TOC sector 0 is a data area in which programs such as music programs recorded by the user and management information on free areas in which new programs can be recorded are mainly recorded. For example, when attempting to record a certain song on the disk 90, the system controller 11 searches for a free area on the disk from U-TOC sector 0, and records audio data there. At the time of reproduction, the area in which the music to be reproduced is recorded is determined from U-TOC sector 0, and the reproduction operation is performed by accessing the area.

In the data area (4 bytes × 588, 2352 bytes) of the U-TOC sector 0 in FIG. 5, a synchronization pattern in which all 0s or all 1s of 1-byte data are formed at the head position is recorded. Followed by the cluster address
(Cluster H) (Cluster L) and sector address (Secto
The address to be r) is recorded over 3 bytes, and 1 byte of mode information (MODE) is added. The 3-byte address here is the address of the sector itself. Note that the header portion in which the synchronization pattern and the address are recorded is described in U-TOC.
The same applies to not only the sector 0 but also the P-TOC sector and the sector in the program area, and the address and synchronization pattern of the sector itself are recorded in sector units.

Subsequently, a maker code, a model code, and a track number (F
irst TNO), track number of last track (Last T
NO), data such as a sector usage status (Used sectors), a disk serial number, and a disk ID are recorded.

Further, in order to identify the area of a track (music or the like) or free area recorded by the user by making it correspond to a table section described later, various pointers (P-DFA) are used as a pointer section. , P-EMPT
An area for recording Y, P-FRA, and P-TNO1 to P-TNO255) is prepared.

As a table unit to be associated with the pointers (P-DFA to P-TNO255), 255 parts tables (01h) to (FFh) are provided. A start address as a starting point, an end address as an end, and mode information (track mode) of the part are recorded for the part. Furthermore, since parts indicated in each part table may be successively connected to other parts, link information indicating a part table in which a start address and an end address of the connected part are recorded can be recorded. Have been. Note that a part refers to a track portion in which temporally continuous data is physically continuously recorded in one track. And the start address,
The address indicated as the end address is an address indicating one or a plurality of parts constituting one music piece (track). These addresses are recorded in short form,
Specify clusters, sectors, and sound groups.

In this type of recording / reproducing apparatus, data of one music piece (track) is reproduced in a physically discontinuous manner, that is, while being recorded over a plurality of parts, the data is reproduced while accessing between parts. Since there is no hindrance to the operation, the music or the like recorded by the user may be recorded in a plurality of parts for the purpose of efficient use of the recordable area.

For this reason, link information is provided, and the part tables can be connected by specifying the part tables to be connected, for example, by the numbers (01h) to (FFh) given to the respective part tables.
That is, in the table section in the U-TOC sector 0, one part table represents one part. For example, for a music composed of three parts connected, three parts tables connected by link information are used. Manages the position of the part.
Note that the link information is actually U-
It is indicated by a numerical value which is a byte position in TOC sector 0. That is, the part table is designated as 304+ (link information) × 8 (byte).

Each part table from (01h) to (FFh) in the table section of the U-TOC sector 0 includes pointers (P-DFA, P-EMPTY, P-FRA, P-TNO1) in the pointer section.
~ P-TNO255) indicates the contents of the part as follows.

The pointer P-DFA indicates a defective area on the magneto-optical disk 90, and is a head in one or a plurality of parts tables showing a track portion (= part) serving as a defective area due to a scratch or the like. Part table is specified. That is, when a defective part exists, any one of (01h) to (FFh) is recorded in the pointer P-DFA, and the corresponding part table indicates the defective part by the start and end addresses. If another defective part exists, another part table is designated as link information in the part table, and the defective part is also indicated in the part table. If there is no other defective part, the link information is set to, for example, "00h".
After that, there is no link.

The pointer P-EMPTY is 1 in the table section.
Or, indicates the leading parts table of a plurality of unused parts tables, and if there is an unused parts table, (01h) to (FFh) as a pointer P-EMPTY.
Is recorded. If there are multiple unused part tables, the part tables are sequentially specified by the link information from the part table specified by the pointer P-EMPTY, and all the unused part tables are connected on the table part. .

The pointer P-FRA indicates a free area (including an erasure area) on which data can be written on the magneto-optical disk 90, and one or more track portions (= parts) indicating the free area are indicated. The first part table in the parts table is specified. In other words, if there is a free area, (01
h) to (FFh) are recorded, and parts corresponding to free areas are indicated by start and end addresses in the corresponding parts table. In addition, when there are a plurality of such parts, that is, when there are a plurality of part tables, the link information sequentially designates the parts table whose link information is “00h”.

FIG. 6 schematically shows the management state of parts that are free areas by using a parts table. This is because when the parts (03h) (18h) (1Fh) (2Bh) (E3h) are set as free areas, this state follows the pointer P-FRA and the parts table (03h) (18h) (1Fh) (2Bh) The state represented by the link (E3h) is shown. The above-described management of the defective area and the unused parts table is the same.

The pointers P-TNO1 to P-TNO255 are
0 indicates a track of a song or the like recorded by the user. For example, the pointer P-TNO1 indicates a temporally leading part of one or a plurality of parts on which data of the first track is recorded. Specified parts table. For example, when the track set as the first track is recorded on the disc without dividing the track, that is, as one part, the recording area of the first track is set to the start position in the parts table indicated by the pointer P-TNO1. And the end address.

For example, when the music set as the second track is discretely recorded on a plurality of parts on the disc, each part is designated in time order to indicate the recording position of the second track. Is done. That is, the pointer
From the part table designated as P-TNO2, another part table is successively designated by link information in a time sequence, and linked to a part table having link information "00h" (see FIG. 6 and FIG. 6). Similar form). In this way, for example, since all parts on which data constituting the second music are recorded are sequentially designated and recorded, the data of the U-TOC sector 0
At the time of reproducing a music piece or performing overwrite recording on the area of the second music piece, the optical head 3 and the magnetic head 6a are accessed to take out continuous music information from discrete parts and to efficiently use the recording area. Recording becomes possible.

By the way, a one-byte track mode is recorded in each part table, and this is track attribute information. The eight bits that make up one byte are d1
Assuming that (MSB) to d8 (LSB), the track mode is defined as follows. d1 ... always 0 d2 ... 0: copyright, 1: no copyright d3 ... always 0 d4 ... 0: audio data, 1: undefined d5, d6 ... 01: normal audio , And others:
Undefined d7 ... 0: monaural, 1: stereo d8 ... 0: emphasis off, 1: emphasis on

As described above, for the rewritable magneto-optical disk 90, the area management on the disk is performed by the P-TOC.
The music and free areas recorded in the recordable user area are performed by U-TOC.

5. Processing at Track Change Request Hereinafter, the U-TO at the time of recording on the disc 90 in this example
An operation related to C rewriting, that is, a process mainly corresponding to a track change request during a recording operation will be described. For example, when recording audio data of another sound source input from the digital interface 22, information such as a track number and track attribute information (track mode) are transmitted together with the digital audio data. Then, a process for generating a track change request based on the change in the track number is performed. Even when an analog audio signal is input from the input terminal 18, when the user performs a track change operation from the operation unit 23, the system controller 11 requests the track change using the data portion input at that timing as a track change point. The processing is performed assuming that has occurred.

When a track change request occurs, the U-TOC is stored in the buffer memory 13 so that the audio data to be recorded is divided at the track change point corresponding to the request.
The required data is written in the data of sector 0. However, it is described in the conventional example that there is a time lag from the occurrence of a track change request to the actual writing of the U-TOC in the buffer memory 13. As described above. That is, the information for track change is written to a part of the U-TOC after the audio data up to the track change point is written to the disk, that is, the data portion as one track is written to the disk. This is performed at the time of writing. For this reason, in the related art, the track change request may not be reflected in the U-TOC, but in the present embodiment, such a problem is prevented from occurring by the following processing.

FIG. 7 shows the state of U-line after the start of the recording operation.
2 shows the processing of the system controller 11 regarding the TOC data. This process will be described first, and then
A specific example will be described. In the processing example described here, the first memory means in the present invention is a compressed audio data area in the buffer memory 13, the second memory means is a TOC area in the buffer memory 13, and the third memory means The means comprises a pointer in the data of the U-TOC sector 0 stored in the TOC area.
It is assumed that the area is a part table area (unused part table) linked from P-EMPTY.

The system controller 11 proceeds to step F1
At 01, the occurrence of a track change request is monitored. If a track change request has been issued, step F10
Proceeding to step 2, it is confirmed whether or not the writing of the U-TOC in the buffer memory is waiting. Here, writing standby means
U-TOC based on previous track change request
In the writing, the writing of the data up to the track change point to the disk has not been completed, and therefore the writing of the information (end address) relating to the track up to the track change point has been completed in the U-TOC. Not in a state.

If writing is not waiting, step F103
The track change data relating to the track change request, that is, the track size and the track mode are held. For example, it is stored in an internal memory of the system controller 11. The track size is the amount of data up to the track change point of the track currently being recorded on the disk, and the track mode is the track mode (track attribute information) for the next track starting from the track change point. This track mode corresponds to 1-byte information recorded in each part table of the U-TOC sector 0.

In this state, in step F104, it is determined whether or not the writing of the track data to the disk, that is, the recording of the data up to the track change point on the disk has ended. If the writing of the track data to the disk has been completed, in step F107, the track mode of the next track is written to the U-TOC in the buffer memory. At this time, the pointer P-EMPT
The track mode is stored in the head part table indicated by Y.

In step F108, the end address of the track for which recording on the disk has been completed is calculated from the track size held in step F104, and the calculated end address is composed of data up to the track change point. Write to the U-TOC as the track end address. That is, the end address is written in the parts table corresponding to the current track. Further, at this time, since the start address of the next track is the value of the end address + 1, the start address is also written. This is to write the start address into the head part table indicated by the pointer P-EMPTY. Then, the pointer P-EMPTY and other necessary pointers are updated. Specifically, the head part table from the pointer P-EMPTY in which the start address and the track mode are written is set as a part table linked from the pointer of the next track, and the pointer P-EMPTY is
The value is updated to a value indicating the second parts table linked from the parts table which was set as the first part. That is, the pointer P-EMPTY removes the part table that was previously the first from the link and sets the second part table as the first part table.

In step F114, it is monitored whether or not the recording operation is completed as a user's instruction or the end of the input data. If not, the process returns from step F114 to F101.

On the other hand, if it is determined in step F102 that the U-TOC writing is waiting, the process proceeds to step F103, and in the U-TOC sector 0, the previous track change request is sent to the parts table (P-EMPTY + n). The track mode held as the track change data at the time of and the track size obtained for the current track change request are recorded. The parts table (P-EMPTY + n) is the n-th parts table linked from the pointer P-EMPTY, and n is the number of unprocessed tracks (excluding tracks being processed).
Then, the track size data is stored in the end address area in the part table (P-EMPTY + n). Note that the track size according to the current track change request and the track mode of the next track are stored in a memory in the system controller 11.

In the process of step F103, the track change data relating to the track change request which has been ignored in step F202 in the process of FIG. This is a process for saving in the part table (P-EMPTY + n). That is, this step F
UT related to the previous track change request by 103
Even if the OC writing is waiting, the track change data (the track mode of the next track and the track size of the current track) according to the current track change request can be saved without being ignored.

If it is determined that the writing of the track data to the disk 90 has not been completed in step F105 after the process proceeds to step F104 without waiting for the U-TOC writing, the process proceeds to step F106. The track size held in step F104 is stored in the end address area of the parts table of the track being processed.

During a period in which no track change request is issued, the process proceeds from step F101 to F109. In Step F109, the temporary storage data, that is, Step F10
In step 3, it is confirmed whether or not the data stored in the parts table (P-EMPTY + n) exists. If not, step F1
Return to 01. If the temporary storage data exists, it is determined in step F110 whether or not the U-TOC writing is waiting. If it is on standby, the process returns to step F101. If there is temporary storage data during a period in which there is no track change request, if it is determined in step F110 that the U-TOC writing is not waiting, whether or not the writing of the track data to the disk 90 has been completed in step F111 Judge. If not, the process returns to step F101.
If the processing has been completed, the process proceeds to step F112, and the track size of the track is referenced from the parts table in which information (start address, track mode) of the track being processed is stored. That is, step F10
In step 6, the track size stored in the end address area is read.

At step F113, the pointer P-EMPTY
It is determined whether or not temporary storage data exists in the parts table linked from. If not, the process proceeds to step F107. If there is, the process proceeds to step F108. The case where temporary storage data exists in the parts table linked from the pointer P-EMPTY means that the track mode for the track following the track to be currently processed is already stored in that parts table in the processing of step F103. If it is. Therefore, in such a case, it is not necessary to write the track mode of the next track in step F107, so that step F107 is skipped. In step F108, the end address of the current track is written as described above. However, in this case, the end address is set in step F1.
In 06, write to the end address area in step F11
It is calculated from the track size referred to in step 3 and written. Also, the start address of the next track is written, and the pointer P-EMPTY and other pointers are updated.

If it is determined in step F114 that the recording has been completed, the process waits until all data until the actual termination is written to the disk 90 in step F115.
When the writing to the disc 90 is completed, step F116
Finally, the U-TOC is written. That is, in this case, the end address of the last track at the end point is written. Note that the end address in this case is based on a track size obtained at the end of the input data or the like (for example, the track size up to the end point of the last track calculated at the end of the input data or at the time of the end operation of the user). Can be calculated. Or in this case,
The address read from the actual disk 90 may be referred to. By updating the U-TOC on the buffer memory 13 in step F116, management information required for a series of recording operations is held as the U-TOC sector 0. The U-TOC data is stored in the buffer memory 1 at a predetermined point in time as step F117.
3 is written to the U-TOC area of the disk 90. That is, the U-TOC is updated on the disc, and the recording is finally completed. Step F117
May be performed immediately after the execution of step F116, or when the disc 90 is ejected, or when the power of the recording / reproducing apparatus 1 is turned off.

As can be understood from this processing, if the next track change request occurs before the U-TOC writing as the processing for a certain track change request is performed, the parts table linked from the pointer P-EMPTY (P-EMPTY + n) stores the information related to the track change request, so that the track change request is not ignored. Then, at a later time (when each track data is recorded on the disc 90), the U-TOC update according to each track change request is performed. In this state, the recording data is managed. Hereinafter, a specific example by the processing of FIG.
Here is an example.

[First Example] First, a first example will be described with reference to FIGS. FIGS. 8 (a) to 8 (e) correspond to FIG.
As in (a) to (e), audio data input to the recording device and stored in the buffer memory, and audio data read from the buffer memory and recorded on the disk are shown. FIG. 8
The buffer memories shown in (a) to (e) are the compressed audio data areas in the buffer memory 13 described with reference to FIG. 9 to 13 show an example of the state of the U-TOC sector 0 in the buffer memory 13 at each time point, and an example of track change data held in the system controller 11, for example. As described with reference to FIG. 5, the parts table in the U-TOC sector 0 includes the pointers P-EMPTY, P-DFA, P-FRA, and P-TNO1 to
It is assumed that there is no part table linked by any of -TNO255, but linked by the pointer P-DFA. Also, actually, the disk 9
As long as there is a free area on 0, there is a parts table linked from the pointer P-FRA to manage the free area, but it is linked from the pointer P-FRA for simplicity of explanation. The example of each drawing will be described ignoring the existence of the parts table.

FIG. 8A shows a state in which data from the trailing end of the track TK4 to a part of the track TK6 is currently stored in the buffer memory. FIG. 2
As described above, writing of input data to the compressed audio data area of the buffer memory 13 and reading of data from the buffer memory 13 are controlled by the write pointer WP and the read pointer RP, and are used in a ring memory form. .

FIG. 8A shows a point in time when data in the middle of the track TK5 is currently written on the disk, as indicated by the read pointer RP. Also,
It is assumed that the data input to the recording device has already advanced to data in the middle of the track TK6 as indicated by the write pointer WP. Then, it is assumed that a track change request TC1 for separating the tracks TK5 and TK6 has occurred at a point slightly earlier than this (when the write pointer WP corresponds to the position of TC1).

FIG. 9 shows a state of the U-TOC sector 0 before the track change request TC1 is generated, that is, a state in which the track changes of the tracks TK4 and TK5 are reflected. For example, tracks TK1
Until TK4, parts table (01h) ~
Assuming that the state is managed by (04h), the parts tables (01h) to (04h) are indicated by pointers P-TNO1 to P-TNO4 as shown in FIG. In (04h), a start address SA, a track mode md, and an end address EA for each track are recorded. For example, in the parts table (01h), for the track TK1, the start address SA1, the track mode md1,
The end address EA1 is recorded. Further, for simplicity of description, it is assumed that all tracks are composed of one part.
The link information of (04h) is “00h”.
(Note that the portion where the value is "00h" or "000000h" is shown as "-")

Here, the processing according to the track change request of the tracks TK4 and TK5 (steps F107 and F1)
08), the start address S of the track TK5
A5 and the track mode md5 are also stored as shown. Further, as a result of the processing at this time, the parts table (05h) is linked to the pointer P-TNO5 as corresponding to the track TK5, and the parts table (06h) to the parts table (06h) to the pointer P-EMPTY.
Until (FFh) is managed as an unused parts table. Parts table (06h)-(FD
h) indicates the next parts table according to the link information.

When the track change request TC1 is generated as shown in FIG. 8A, the processing of FIG.
Since the writing is not waiting, the process proceeds to step F104, and FIG.
As shown in 0 (c), the data size SZ5 of the track TK5 and the track mode md6 of the track TK6 are held as track change data. In the case of FIG. 8A, since the writing of the data of the track TK5 to the disk 90 has not been completed, the process proceeds to step F106, and as shown in FIG. The data size SZ5 of the track TK5 is written in the end address area of the parts table (05h).

Next, as shown in FIG. 8 (b), when the writing of the data of the track TK5 to the disk 90 has not yet been completed, a track change request TC2 for further dividing the tracks TK6 and TK7 is generated. I do. In this case, the U-
Since the TOC writing has not been completed, the process corresponding to the track change request TC2 proceeds to step F103. Therefore, as shown in FIG. 11, the pointer P-EMPTY
In the part table (P-EMPTY + n) linked in this case, in the part table (06h), the track mode md6 of the track TK6 held at the time of the previous track change request TC1 and the current track change request T
The track size SZ6 of the track TK6 obtained for C2 is stored. The track size SZ6 for the current track change request and the next track TK
7, the track mode md7 is the system controller 11
In the internal memory as track change data.

Thereafter, until the state shown in FIG.
Step F101 → F109 → F110 → F111 → F
Standby in the state of 101 ... When the writing of the data of the track TK5 to the disk 90 is completed as shown in FIG. 8C, the process proceeds to step F112, and in this case, the data is stored in the end address area of the parts table (05h) of the track TK5 being processed. The end address EA5 of the track TK5 is calculated by referring to the current track size SZ5. In step F113, since temporary storage data, that is, data stored as shown in FIG. 11 in response to the track change request TC2 exists, the process proceeds to step F108, and writing is performed as shown in FIG. First, the end address EA5 of the track TK5 is stored in the parts table (05h). Also, the start address SA6 of the track TK6 is stored in the parts table (06h).
Is stored. (Because the track mode md6 is already stored, step F107 is passed in this case.) Then, various pointers are updated. The pointer P-EMPTY is set to 07h, and the pointer P-TNO6 is set to 0.
6h. The link information of the parts table (06h) is "00h". This allows the parts table (0
6h) is a parts table of the truck TK6.

Thereafter, until the state shown in FIG.
Step F101 → F109 → F110 → F111 again
→ Stand by in the state of F101. And FIG. 8 (d)
When the writing of the data of the track TK6 to the disk 90 is completed, the process proceeds to step F112. In this case, the track size SZ stored in the end address area of the parts table (06h) of the track TK6 being processed.
6 is referenced, and the end address EA6 of the track TK6
Is calculated. In step F113, it is determined that there is no temporarily stored data. That is, as shown in FIG. 12, there is no data temporarily stored in the parts table (07h) linked from the pointer P-EMPTY at this time. Then, the process proceeds to step F107 to write the track mode md7 of the track TK7 held as track change data into the parts table (07h) linked from the pointer P-EMPTY, and further to step F108.
The U-TOC sector 0 is rewritten to the state shown in FIG. That is, the end address EA6 of the track TK6 is stored in the parts table (06h). The start address SA7 of the track TK7 is stored in the parts table (07h). Then, various pointers are updated. The pointer P-EMPTY is set to 08h, and the pointer P-TNO7 is set to 07h. Thus, the parts table (07h) is used as the parts table of the track TK7.

The state shown in FIG. 13 is equivalent to the state shown in FIG. 9, that is, the state in which all the track change requests up to that point are correctly reflected. In this way, even if the next track change request TC2 occurs before the U-TOC writing for the track change request TC1 is completed by the processing of FIG. It will be understood that

Thereafter, the recording operation further proceeds as shown in FIG. 8 (e). Even if a track change request is generated, the process of FIG. U-TOC sector 0 is updated on the buffer memory 13. Of course, when the recording operation is completed, the processing of steps F115 to F117 in FIG. 7 is performed to update the U-TOC in the buffer memory 13 to the final state, and the final state of the U-TOC Data is written to disk 90.

[Second Example] Next, FIG.
An example will be described. FIGS. 14 (a) to 14 (e) correspond to FIG.
As in (a) to (e), audio data input to the recording device and stored in the buffer memory, and audio data read from the buffer memory and recorded on the disk are shown. FIG.
18 to 18 also show the state of the U-TOC sector 0 in the buffer memory 13 at each point in time, as in FIGS.
3 shows an example of track change data held in the system controller 11, for example.

FIG. 14 (a) shows the same time as FIG. 8 (a), that is, the time after the track change request TC1 is issued while the track TK5 is being written to the disk 90. . FIG. 14B shows a case where a track change request TC2 is further issued while the track TK5 is being written to the disk 90, as in FIG. 8B. In b), it is assumed that a track change request TC3 is received immediately after that (while the track TK5 is still being written to the disk 90). The processing up to the point at which the track change request TC2 is generated is as described with reference to FIGS. 9, 10, and 11. That is, when the track change request TC2 shown in FIG. 0 is the state of FIG. Here, the state transition after the track change request TC3 is generated after the U-TOC sector 0 enters the state of FIG.
The description will be made from 5 onward.

As described with reference to FIG. 11, the track TK is processed by the processing corresponding to the track change request TC2.
The track size SZ5 is stored in the end address area of the parts table (05h) of No. 5 and the pointer P-EM
The head part table (06h) from the PTY stores the track mode md6 and the track size SZ6 for the track TK6. At this time, as the track change data, the track size SZ6 of the track TK6 and the track mode md7 of the track TK7 are stored.

In this state, when a track change request TC3 for dividing the tracks TK7 and TK8 is generated, UT
OC sector 0 is updated as shown in FIG. That is, in this case, the track change request T
Since the U-TOC writing to C1 and TC2 has not been completed, the process corresponding to the track change request TC3 proceeds to step F103. Therefore, as shown in FIG. 15, as the parts table (P-EMPTY + n) linked from the pointer P-EMPTY, in this case, the second parts table (07h) linked because the number of unprocessed tracks n = 2, The track mode md7 of the track TK7 held at the time of the previous track change request TC2
And the track size SZ7 of the track TK7 obtained for the current track change request TC3. The track size SZ7 related to the current track change request TC3 and the track mode md8 of the next track TK8 are held as track change data in a memory in the system controller 11.

Thereafter, steps F101 → F109 → F110 → F111 until the state of FIG. 14 (c) is reached.
→ Stand by in the state of F101. And FIG.
(C) As shown in FIG.
When the writing to the track TK5 is completed, the process proceeds to step F112.
With reference to the track size SZ5 stored in the end address area of h), the end address EA5 of the track TK5 is calculated. Further, in the determination of step F113, the temporary storage data, that is, the track change request T
Since there is data stored as shown in FIG. 15 according to C2 and TC3, the process proceeds to step F108, and writing is performed as shown in FIG. First, the parts table (05h)
Stores the end address EA5 of the track TK5. Also, the track TK is displayed in the parts table (06h).
No. 6 start address SA6 (= EA5 + 1) is stored. Then, various pointers are updated. Pointer P-EM
PTY is set to 07h, and the pointer P-TNO6 is set to 06h. The link information of the parts table (06h) is "00
h ”. This makes the parts table (06h)
Is a parts table of the track TK6.

Thereafter, until the state of FIG. 14D is reached, steps F101 → F109 → F110 → F1 are performed again.
11 → F101... Wait. And FIG.
(D) As shown in FIG.
When the writing to the track TK6 is completed, the process proceeds to step F112. In this case, the part table (06) of the track TK6 being processed is
With reference to the track size SZ6 stored in the end address area of h), the end address EA6 of the track TK6 is calculated. Further, in the determination of step F113, the temporary storage data, that is, the track change request T
Since there is data (data of the part table (07h)) stored as shown in FIG. 16 according to C3, the process proceeds to step F108, and writing is performed as shown in FIG.
First, in the parts table (06h), the track TK6
Is stored. Also, the start address S of the track TK7 is stored in the parts table (07h).
A7 (= EA6 + 1) is stored. Then, various pointers are updated. The pointer P-EMPTY is set to 08h, and the pointer P-TNO7 is set to 07h. The link information of the parts table (07h) is "00h". Thus, the parts table (07h) is used as the parts table of the track TK7.

Thereafter, until the state shown in FIG. 14E is reached, steps F101 → F109 → F110 →
Stand by in the state of F111 → F101. When the writing of the data of the track TK7 to the disk 90 is completed as shown in FIG.
In this case, the parts table (0
With reference to the track size SZ7 stored in the end address area of 7h), the end address EA7 of the track TK7 is calculated. In step F113, it is determined that there is no temporarily stored data. That is, as shown in FIG. 17, at this point, there is no temporarily stored data in the parts table (08h) linked from the pointer P-EMPTY. Therefore, the process proceeds to step F107, where the pointer P-EM
The track T held as track change data in the parts table (08h) linked from the PTY
The track mode md8 of K8 is written, and the process further proceeds to step F108, where the U-TOC sector 0 is rewritten to the state shown in FIG. That is, the parts table (07h)
Stores the end address EA7 of the track TK7. Also, track TK is displayed in the parts table (08h).
8 start addresses SA8 (= EA7 + 1) are stored. Then, various pointers are updated. Pointer P-EM
PTY is set to 09h, and the pointer P-TNO8 is set to 08h. The link information of the parts table (08h) is "00
h ”. This makes the parts table (08h)
Is a parts table of the track TK8.

The state shown in FIG. 18 is equivalent to the state shown in FIG. 9, that is, the state in which all track change requests up to that point are correctly reflected. That is, even if a plurality of track change requests TC2 and TC3 are generated before the U-TOC writing for the track change request TC1 is completed by the processing of FIG. 7, all the track change requests are correctly reflected. It will be understood that the state will be as follows.

Thereafter, the recording operation further proceeds.
If a track change request occurs, the U-TOC sector 0 is updated on the buffer memory 13 in the same manner by the processing in FIG. Of course, when the recording operation is completed, the processing of steps F115 to F117 in FIG. 7 is performed, and the U-TOC on the buffer memory 13 is updated to the final state.
The U-TOC data in the final state is written to the disk 90.

As can be clearly understood from this second example,
Even if a number of track change requests occur before the U-TOC writing for one track change request is performed, as long as there is a remaining part table linked from the pointer P-EMPTY, a large number It can respond to multiple track change requests. Also, the U-TO described in FIG.
As can be seen from the management structure of C, it is assumed that a very large number of track change requests have been made, and that there is no remaining part table available for temporary storage among the part tables linked from the pointer P-EMPTY. Is U-
This means that the upper limit of the number of tracks that can be managed in TOC sector 0 has been reached. The upper limit is if all tracks are 1
If it is assumed that it is composed of parts, it is 255 tracks, and if there is a track composed of multiple parts,
The upper limit of the number of tracks decreases accordingly. That is, in other words, how many times a track change is possible at a certain time coincides with the number of unused parts tables remaining at that time. Therefore, according to the processing of FIG. 7, since the temporarily stored data at the time of the track change is stored in the unused parts table, the track change processing until the upper limit of the number of tracks can be surely executed. However, this is a suitable process that effectively uses the storage area.

Further, by the above processing, the pointer
By using the parts table linked from the P-EMPTY, the rewriting of the U-TOC sector 0 can be made more efficient.
For example, in the case of the track mode md, the value of the track mode md written as temporary storage can be used as regular information thereafter. That is, step F1
07 does not need to be performed.

Although the embodiments have been described above, various modifications of the present invention are possible. First, the part corresponding to the third memory means of the present invention has been described using an example of a part table linked from the pointer P-EMPTY, but another storage area may be used. For example, T in the buffer memory 13
A predetermined area in another sector of the U-TOC stored in the OC area, another free area in the buffer memory 13 or a memory in the system controller 11 may be used. When mounted, it may be set in the memory element. Regardless of how the third memory is realized, it goes without saying that various specific processing procedures can be considered in addition to FIG.

Although the embodiments have been described on the assumption that a mini-disk system is used, the present invention is not limited to this, and the present invention can be applied to a recording apparatus corresponding to various recording media.

[0112]

As can be seen from the above description, according to the present invention, the third memory means capable of storing track change data in response to a plurality of track change requests is provided.
Management information (UT) related to one track change request
OC) Even at the time of waiting for writing, track change data can be held in response to the next track change request. Therefore, at a predetermined time according to the progress of the recording of the main data on the recording medium, the management information (U-TOC) can be updated on the second memory corresponding to each track change request, and the data to be recorded can be updated. Even if there is a short track in time, there is an effect that an accurate track division is realized for the recording data. In particular, the present invention is effective when recording audio data from a sound source in which a very short track is set, such as a learning material sound source for language learning and a sound source collecting various sound effects.

Further, since a predetermined area in the management information stored in the second memory means, for example, an empty area is used as the third memory means, it is necessary to set the third memory means specially. However, it is advantageous in the configuration. Especially U-
If the area where track change data is finally written in the TOC is used as the third memory means, the U-TOC writing operation can be made more efficient. In addition, the first and second memory means are realized as different memory areas in one memory element, which is advantageous in configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram of a recording and reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a structure of a buffer memory according to the embodiment;

FIG. 3 is an explanatory diagram of a cluster format of the mini disk system.

FIG. 4 is an explanatory diagram of an area structure of a mini disc.

FIG. 5: U-TOC sector 0 of the mini disc system
FIG.

FIG. 6 shows U-TOC sector 0 of the mini disc system.
It is explanatory drawing of the link form of.

FIG. 7 is a flowchart of a process related to U-TOC update at the time of recording according to the embodiment.

FIG. 8 is an explanatory diagram of a first example of an embodiment.

FIG. 9 is an explanatory diagram of a state of a U-TOC sector 0 of the first example of the embodiment.

FIG. 10 shows a U-TOC sector 0 of the first example of the embodiment.
It is explanatory drawing of the state of.

FIG. 11 shows a U-TOC sector 0 of the first example of the embodiment.
It is explanatory drawing of the state of.

FIG. 12 shows a U-TOC sector 0 of the first example of the embodiment.
It is explanatory drawing of the state of.

FIG. 13 shows a U-TOC sector 0 of the first example of the embodiment.
It is explanatory drawing of the state of.

FIG. 14 is an explanatory diagram of a second example of the embodiment.

FIG. 15 shows a U-TOC sector 0 of the second example of the embodiment.
It is explanatory drawing of the state of.

FIG. 16 shows a U-TOC sector 0 of the second example of the embodiment.
It is explanatory drawing of the state of.

FIG. 17 shows a U-TOC sector 0 of the second example of the embodiment.
It is explanatory drawing of the state of.

FIG. 18 is a U-TOC sector 0 of a second example of the embodiment.
It is explanatory drawing of the state of.

FIG. 19 is a flowchart of a process related to a conventional track change request.

FIG. 20 is an explanatory diagram of an operation related to a conventional track change request.

FIG. 21 is an explanatory diagram of a state of management information related to a conventional track change request.

[Explanation of symbols]

1 recording / reproducing device, 3 optical head, 8 encoding /
Decoding unit, 11 system controller, 12 memory controller, 13 buffer memory, 14 encoding / decoding unit, 22 digital interface unit,
23 operation unit, 24 display unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5D044 AB05 BC06 CC04 DE49 DE53 EF03 EF05 5D090 AA01 BB10 CC01 CC14 DD03 DD05 FF02 FF30 GG29 GG32 GG33 JJ03

Claims (3)

[Claims] 1. A recording apparatus for recording a main medium and a recording medium on which management information for managing the main data on a track basis is recorded. A first memory for temporarily storing main data input for recording on a recording medium by the writing and reading unit; and a second memory for storing management information read from the recording medium by the writing and reading unit. In the recording operation, the input main data is continuously stored in the first memory means, and the first data is stored in the first memory means.
Recording control means for controlling recording of main data intermittently read from the memory means on the recording medium by the writing / reading means; and storage of track change data accompanying a track change request generated during the recording operation. A third memory means capable of responding to a number of track change requests; and a third memory means which is stored in the third memory means at a timing corresponding to a progress state of recording of main data on a recording medium by the write / read means. Updating means for updating the management information stored in the second memory means on the basis of the track change data obtained; and updating the management information stored in the second memory at a predetermined time after the end of the recording operation. And a management information writing control means for writing the information on a recording medium by the writing and reading means. 2. The recording apparatus according to claim 1, wherein a predetermined area in the management information stored in said second memory means is used as said third memory means. 3. The recording apparatus according to claim 1, wherein said first and second memory means are realized as different memory areas in one memory element.