JP3257069B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus capable of recording data such as music on a disk-shaped recording medium.

[0002]

2. Description of the Related Art Data rewritable disc media on which a user can record music data and the like are known. In such disc media, an area in which data such as music has already been recorded and an unrecorded area have been recorded. Is provided, and the management data is rewritten every time the recording operation is completed, for example. When attempting to record a certain song, the recording device searches for an unrecorded area on the disc from the user TOC, and records audio data there.

In a recordable disk medium such as a magneto-optical disk (MO disk), a DA
Random access is extremely easy as compared with a tape-shaped recording medium such as T or a compact cassette tape. Therefore, for example, one music piece is always a continuous segment (data physically continuous with the segment is recorded). It does not need to be recorded on a track portion), and there is no problem even if it is discretely divided into a plurality of segments and recorded on a disk. In other words, if the recording / reproducing operation and the high-speed access operation in the segment are repeated, even if the track of one music is divided into a plurality of segments and physically divided, the recording / reproduction of the music is not affected. can do.

[0004] For example the first piece of music segment T _1, as shown in FIG. 9, the second piece of music are continuously recorded as a segment T _2, 4th music, the segment T as 5 Track
_{As shown in 4 (1) to} T4 ₍₄₎ and T5 _{(1) to} T5 ₍₂₎ , it is also possible to divide and record on a track. (Note that FIG. 9
Is a schematic diagram to the last, and one segment often covers several to several hundred tracks or more. )

When music is repeatedly recorded and erased from the magneto-optical disk, empty areas on the track are generated irregularly due to the difference in the playing time of the recorded music and the playing time of the erased music. Executing discrete recording in this manner makes it possible to record a song longer than the deleted song, for example, by utilizing the erased portion. The waste is eliminated. It should be noted that what is recorded is not limited to “songs”, but includes any signal if it is an audio signal. In this specification, one set of data that is continuous in content is referred to as “songs”. I do.

[0006] Of course, in such a disk medium, recording is continued while accessing a plurality of unrecorded area segments during recording, and one music piece is correctly and continuously reproduced during reproduction. The segment must be accessed. For this purpose, a segment within one song (for example, T _{4 ( 1)}
To T _{4 (4)} ) and data indicating an unrecorded area are held as user TOC information rewritten for each recording operation or erasing operation as described above. By reading the user TOC information and accessing the head, the recording / reproducing operation is controlled appropriately.

[0007]

When data is recorded in an unrecorded area, a track jump may occur due to the influence of vibration, impact, or the like. For example, consider the case where the recording area REA which data recording has been made in the past around the unrecorded area FRA as shown in FIG. 10 (a) is present, this recording the operation from the address A ₁ of the address A ₂ section It is sufficient that the recording head (optical head and magnetic head) scans the recording head. However, due to the influence of vibration, impact, and the like applied to the apparatus, the recording head performs a track jump as shown by a dotted line TJ in FIG. May move out of the unrecorded area FRA and move to the recording area REA in which data has already been recorded. In this case, the past recorded data is destroyed (the portion indicated by DS in the figure), and there is a problem that this data cannot be recovered again.

In order to prevent such data destruction, the recording operation (recording level laser beam output and application of a magnetic field) may be immediately interrupted upon occurrence of a track jump. In order to detect a track jump, absolute position information recorded as a pre-groove (wobbling groove) on the disc is detected, and the continuity is monitored. Can be accurately detected. However, a track jump of several tracks may already occur during a time delay before decoding the reflected light information from the pre-groove as the absolute position information. Absent. That is, the data has already been destroyed when the track jump is detected.

Further, if a traverse signal obtained when a laser spot crosses a track is monitored, the occurrence of a track jump can be quickly detected. It may occur due to the influence of dust or the like, and it is difficult to make a distinction between them. Of course, in order to prevent data destruction, if there is a possibility of a track jump, it is necessary to interrupt the recording operation immediately, but if the recording was interrupted frequently including the traverse signal due to the influence of dust etc. There is a problem that the recording efficiency is reduced and the recording efficiency is not practical. In particular, when dubbing and recording music input from another source device, the recording operation cannot be performed in time for the signal input.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is intended to prevent data already recorded from being destroyed by a track jump at the time of recording and becoming unrecoverable. In other words, it is an object of the present invention to provide a recording apparatus that performs an appropriate re-recording operation when a track jump occurs and the past recorded data is destroyed.

For this reason, as a recording apparatus, a recording medium is used.
Recording and reproducing means for recording and reproducing data
Means for holding data for a predetermined time, recording / reproducing positions by the recording / reproducing means, and the memory means
A control means for you to control the data retention by, the control means, the predetermined a continuous unrecorded area de
When writing data, if the previous area adjacent to the unrecorded area is a recording area in which data has already been recorded, first, the data reproduction by the recording / reproducing means is executed from a predetermined position in the recording area. , Replayed data
Data in the memory means, and
When the recording means reaches the unrecorded area, the recording
Controlling execution of the recording of the predetermined data by the raw means
The configuration is as follows.

Further , in such a recording apparatus,
Track jump detection to detect track jump
And a track jump detecting means.
When a rack jump is detected, the control means
Stop the data recording operation by the recording / reproducing means, and
Jump jump destroys the data in the recording area.
The recording area held in the memory means.
Using the data of
Control the execution of recording for data recovery.
You. In addition, the control means may control a portion where data is destroyed,
Records for recovery of the corrupted data
To control.

[0013]

By reading a predetermined amount of previously recorded data in an adjacent area (recorded area) before a recorded area (unrecorded area) before a recording operation, data destruction may occur. Also, data recovery can be performed by a re-recording operation.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the recording apparatus according to the present invention will be described below. First, the configuration of a recording / reproducing apparatus according to an embodiment will be described with reference to FIG. The segment management data written as the user TOC information on the magneto-optical disk corresponding to the device will be described, and then the operation of the present embodiment will be described.

This embodiment is a recording / reproducing apparatus using an MO disk as a recording medium. FIG. 1 is a block diagram of a main part of the recording / reproducing apparatus. In FIG. 1, reference numeral 1 denotes, for example, a magneto-optical disk on which a plurality of music pieces (audio data) are recorded, and is driven to rotate by a spindle motor 2. 3
An optical head irradiates a laser beam to the magneto-optical disk 1 at the time of recording / reproducing, and has a high-level laser output for heating a recording track to the Curie temperature at the time of recording, and is reflected by a magnetic Kerr effect at the time of reproducing. Provides a relatively low level laser output for detecting data from light.

For this purpose, the optical head 3 is equipped with a laser diode as a laser output means, an optical system including a polarizing beam splitter and an objective lens, and a detector for detecting reflected light. The objective lens 3a is 2
The shaft mechanism 4 is held so as to be displaceable in the radial direction of the disk and in the direction of coming and going to the disk, and the entire optical head 3 is movable in the radial direction of the disk by the sled mechanism 5.

Reference numeral 6 denotes a magnetic head which applies a magnetic field modulated by the supplied data to the magneto-optical disk, and is arranged at a position facing the optical head 3 with the magneto-optical disk 1 interposed therebetween.

The information detected from the magneto-optical disk 1 by the optical head 3 by the reproducing operation is supplied to the RF amplifier 7. The RF amplifier 7 performs a calculation process on the supplied information to reproduce RF signals, tracking error signals, focus error signals, absolute position information (absolute position information recorded as a pre-groove (wobbling groove) on the magneto-optical disk 1), Address information, subcode information,
Extract a focus monitor signal and the like. Then, the extracted reproduction RF signal is supplied to the encoder / decoder unit 8. Further, the tracking error signal and the focus error signal are supplied to the servo circuit 9, and the address information is supplied to the address decoder 10 and demodulated. Further, the focus monitor signal is supplied to a system controller 11 constituted by a microcomputer, for example.

The servo circuit 9 generates various servo drive signals based on the supplied tracking error signal, focus error signal, track jump command, seek command, rotation speed detection information, and the like from the system controller 11, and generates the two-axis mechanism 4 and The focus and tracking control is performed by controlling the thread mechanism 5, and the spindle motor 2 is controlled at a constant angular velocity (CAV) or a constant linear velocity (CLV).

The reproduced RF signal is supplied to the encoder / decoder 8
Then, decoding processing such as EFM demodulation and CIRC is performed, and is temporarily written into the buffer RAM 13 by the memory controller 12. The reading of data from the magneto-optical disk 1 by the optical head 3 and the transfer of reproduced data from the optical head 3 to the buffer RAM 13 are performed at 1.41 Mbit / sec.

The data written in the buffer RAM 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 14. Then, the signal is subjected to reproduction signal processing such as decoding processing for the audio compression processing, converted into an analog signal by the D / A converter 15, supplied from the terminal 16 to a predetermined amplifier circuit section, and reproduced and output. For example, they are output as L and R audio signals.

The absolute position information output from the address decoder 10 and obtained by decoding the pre-groove information or the address information recorded as data is transmitted to the system controller 1 via the encoder / decoder section 8.
1 and used for various control operations. further,
A lock detection signal of a PLL circuit for generating a bit clock for the recording / reproducing operation, and a monitor signal indicating a lack of a frame synchronization signal of reproduced data (L and R channels) are also supplied to the system controller 11.

When a recording operation is performed on the magneto-optical disk 1, a recording signal (analog audio signal) supplied to a terminal 17 is converted into digital data by an A / D converter 18 and then converted to an encoder. / Decoder unit 14 for audio compression encoding. The recording data compressed by the encoder / decoder unit 14 is temporarily stored in the buffer RAM 1 by the memory controller 12.
3 and read out at a predetermined timing and sent to the encoder / decoder unit 8. Then, after being subjected to encoding processing such as CIRC encoding and EFM modulation by the encoder / decoder section 8, it is supplied to the magnetic head drive circuit 15.

The magnetic head drive circuit 15 supplies a magnetic head drive signal to the magnetic head 6 according to the encoded recording data. That is, the magnetic head 6 causes the magnetic head 6 to apply an N or S magnetic field. At this time, the system controller 11 supplies a control signal to the optical head 3 so as to output a laser beam at a recording level.

Reference numeral 19 denotes an operation input unit provided with keys for user operation, and reference numeral 20 denotes a display unit constituted by, for example, a liquid crystal display. The operation input unit 19 is provided with a recording key, a reproduction key, a stop key, an AMS key, a search key, and the like so as to be used by a user.

Reference numeral 21 denotes a RAM (hereinafter, referred to as a TOC memory) for holding TOC information in the magneto-optical disk 1. At the time point when the magneto-optical disk 1 is loaded or immediately before the recording or reproducing operation, the system controller 11 drives the spindle motor 2 and the optical head 3 and, for example, the TOC set on the innermost peripheral side of the magneto-optical disk 1 Let the data of the area be extracted. Then, the system controller 1 via the RF amplifier 7 and the encoder / decoder unit 8
The TOC information supplied to the magneto-optical disk 1 is stored in the TOC memory 21 and is subsequently used for controlling the recording / reproducing operation for the magneto-optical disk 1.

In particular, in the recordable disk medium, segment management data for recording / reproducing one music piece as one or a plurality of divided segments as described above is recorded. In other words, a user TOC area (hereinafter, referred to as a user TOC area) whose content is rewritten in accordance with data recording or erasing for management of a recording data area
U-TOC), and has a data structure as shown in FIG. 2, for example.

The U-TOC is composed of, for example, a data area of 4 bytes.times.588 , and has a header having a synchronization pattern of 1-byte data of all 0s or all 1s at the head position to indicate that the area is a U-TOC area. Is provided. At the predetermined address, the track number of the first song recorded (First TNO) and the song number of the last song (Last TNO)
TNO), sector use status, disk ID, and other data are recorded. Further, there is provided an area for recording various correspondence table instruction data (P-DFA to P-TNO255) for associating each recorded music or the like with a management table described later.

On the other hand, 255 part tables from (01) to (FF) are provided as management tables. Each part table has a start address as a starting point, an end address as an end, and an end address as to a certain segment. The mode information of a segment (track) and, if the segment is subsequently connected to another segment, link information indicating a parts table in which the start address and end address of the connected segment are recorded can be recorded. Has been made.

The track mode information includes information indicating whether or not the segment is set to prohibit overwriting or data copying, whether or not the information is audio information, a monaural / stereo type, and the like. The link information includes, for example, the number (0
The parts tables to be connected are specified by 1) to (FF). That is, in the management table, one part table represents one segment, for example, 3
For a song composed of two connected segments, the segment positions are managed by three parts tables linked by link information. In addition,
Therefore, (01) to (FF), which are the numbers of the parts table, can be directly used as the segment numbers.

Each of the parts tables (01) to (FF) in the management table corresponds to the corresponding table designation data (P-DFA to P-DFA).
TNO255) indicates the contents of the segment.

The P-DFA indicates a defective area on the magneto-optical disk 1, and a track table (= segment) serving as a defective area due to a scratch or the like is shown in one part table or a plurality of parts tables. The first parts table is specified. In other words, if a defective segment exists, (01) to (FF) in the correspondence table instruction data P-DFA
In the corresponding parts table, a defective segment is indicated by a start and end address. If another defective segment exists, another part table is specified as link information in the part table, and the defective segment is also shown in the part table. If there is no other defective segment, the link information is set to, for example, "(00)", and there is no link thereafter.

P-EMPTY indicates the head part table of one or more unused part tables in the management table. If an unused part table exists, the corresponding table instruction data P-EMPTY is set as follows. (01) 〜
(FF) is recorded. If there are multiple unused parts tables, corresponding table instruction data
The part tables are sequentially specified by the link information from the part table specified by P-EMPTY, and all the unused part tables are linked on the management table.

For example, in the case of a magneto-optical disk on which no recording is made and there is no defect, all the part tables are not used.
The part table (01) is specified by the PTY, and the part table (0) is used as the link information of the part table (01).
2) is specified, the parts table (03) is specified as link information of the parts table (02), and so on, and the parts table (FF) is linked. In this case, the parts table (F
The link information of F) is set to “(00)” indicating no connection thereafter.

The P-FRA indicates an unrecorded area (including an erased area) of data on the magneto-optical disk 1, and one or a plurality of track portions (= segments) indicating unrecorded areas are shown. The first part table in the parts table is specified. That is, when there is an unrecorded area, any one of (01) to (FF) is recorded in the corresponding table instruction data P-FRA, and the corresponding part table has a start and a segment which is an unrecorded area. Indicated by the end address. When there are a plurality of such segments, that is, when there are a plurality of parts tables, the link information indicates "(00)"
Up to the parts table.

FIG. 3 schematically shows a management state of a segment which is an unrecorded area by using a parts table. This is because when the segment (03) (18) (1F) (2B) (E3) is set as an unrecorded area, this state is changed to the parts table (03) (18) (1F) following the corresponding table instruction data P-FRA. ) (2B) and (E3) indicate the state represented by the link. It should be noted that the above-described management of the defective area and the unused parts table is the same.

P-TNO1 to P-TNO255 indicate each music piece recorded on the magneto-optical disk 1. For example, in the correspondence table instruction data P-TNO1, one or a plurality of pieces of data in which the data of the first music piece are recorded are shown. The part table indicating the temporally leading segment of the segments is specified.

For example, in the case of the first music piece, the tracks are not divided on the disk (that is, in one segment).
If it is recorded, the recording area of the first tune is recorded as a start and end address in the parts table indicated by the corresponding table instruction data P-TNO1.

If the second piece of music is discretely recorded on a plurality of segments on the disc, for example, each segment is designated in a temporal order to indicate the recording position of that music. In other words, from the part table specified in the correspondence table instruction data P-TNO2, another part table is sequentially specified by the link information in a temporal order, and linked to the part table in which the link information is "(00)". (Similar form to FIG. 3 described above). In this way, for example, all the segments in which the data making up the second music are recorded are sequentially designated and stored, so that the U-TOC data can be used to play back the second music or to the area of the second music. When the overwriting is performed, the optical head 3 and the magnetic head 6 are accessed so that continuous music information can be extracted from discrete segments, and recording can be performed using the recording area efficiently.

The recording / reproducing apparatus of the present embodiment for the magneto-optical disk 1 on which such U-TOC data is recorded,
Using the U-TOC data read into the TOC memory 21, the recording area on the disc is managed to control the recording / reproducing operation. In particular, during a recording operation, an unrecorded area on the disc is searched for from the U-TOC data, and data is recorded there. When a recording area is adjacent to the unrecorded area, Then, data recorded in advance from a predetermined portion of the recording area is read and stored in the buffer RAM 13, and thereafter, the recording operation of new data in the unrecorded area is started.

When data in a neighboring recording area is destroyed due to a track jump during recording, a rewriting process is performed by using previously read data to recover data. Is what you do. Hereinafter, the operation at the time of recording will be described with reference to FIGS.

On the recording track of the magneto-optical disk 1, as shown in FIG. 4, a cluster CL (= 36 sectors−) composed of a sub data area of 4 sectors (1 sector = 2352 bytes) and a main data area of 32 sectors is continuous. One cluster is the minimum unit at the time of recording. One cluster corresponds to two or three tracks. The address is recorded for each sector.

Here, as shown in FIG. 5, a segment (addresses A _{WS to} A _WE ) including a plurality of clusters CL _{1 to} CL ₉ is assumed to be an unrecorded area FRA, and furthermore, an adjacent adjacent area FRA. It is assumed that the area is a recording area REA. The addresses A _WS and A _WE are the start address and the start address in the parts table specified in the corresponding table designation data P-FRA as U-TOC data (or any of the parts tables linked from the parts table by link information). It is stored as an end address.

Here, in the present embodiment, at the time of the recording operation, first, data recorded in, for example, one cluster at the end portion adjacent to the unrecorded area FRA in the recording area REA is read. That is, the system controller 11 first calculates an address one cluster before the recording start address A _WS , sets the calculated address as the past data read start address A _PS, and calculates the past data read start address A _PS.
To read / write head (optical head 3 and magnetic head 6)
Is performed, and the recording scan is started when the recording / reproducing head reaches the recording start address _AWS .
The scan in Figure 5 show as H _1. The hatched area is the reproduction scan,
Non-hatched portions indicate recording scans.

The system controller 11 detects a track jump by detecting a traverse signal in the servo circuit 9. Since the traverse signal is generated every time the laser spot crosses the track, by counting the traverse signal,
It is possible to determine how many tracks have been crossed. However,
As described above, it may occur due to the influence of dust on the disk. Accordingly, the system controller 11 counts the traverse signal and, when detecting that a track jump of three or more tracks has occurred as shown in FIG. 6A, determines that a track jump has occurred and immediately stops the recording operation. Therefore, data three or more tracks before is not destroyed. Therefore, even if data destruction occurs, one cluster (2 to 3 tracks) read in advance is used.
The data can be used to perform a re-recording operation (data recovery operation).

When two or less traverse signals occur sporadically as shown in FIG. 6 (b), it is regarded as, for example, the influence of dust on the disk, and depending on the detection, the recording operation is not immediately stopped. For example, subsequently, the absolute position information based on the pre-groove is confirmed, and it is determined that the track jump has occurred by confirming that the continuity of the absolute position information is broken.

The case where two or less traverse signals occur spontaneously is the case where a track jump of two tracks or less actually occurs, and one to two tracks before the confirmation of the track jump by the absolute position information. Even if the past record data is destroyed, it is possible to recover the past data of one cluster since it is read in advance.

FIG. 7 is a flow chart showing the processing at the time of recording by the system controller 11 which performs such recording operation control. Each step is indicated by F101 to F132.
A register for address management for controlling the scanning position of the recording / reproducing head on the disk;
Registers corresponding to the following addresses are prepared as registers for write / read control in AM 13.

A _WS , disc write start address: address indicating the position where writing is started this time (= start address in an unrecorded area) A _WE , disc write end address: position where writing must be ended a _PS (end address in = unrecorded area) address indicating the past data reading start address: address indicating a position to start reading of past data a _PE, past data reading end address: the last reading range of past data Address indicating the position AW, disk write address: address indicating the position to start disk writing (changed by rewriting, etc.) A _WC , current write address: indicating the current write position address a _TJ, track jump detection immediately after the address: the address a _RW which is detected immediately after a track jump, Disc rewriting address: Address indicates the start position when performing rewriting after a track jump P _R, the read pointer: a pointer P _W that specifies the read address of the buffer RAM, the write pointer: write address of the buffer RAM Pointer to specify

When the magneto-optical disk 1 is loaded, the TOC information is read as described above, and thus the U-TOC data shown in FIG. 2 is also held in the TOC memory 21. When a recording operation is performed from the input unit 19, the routine shown in FIG. 7 is performed using the U-TOC data.

First, the start address and end address of the unrecorded area FRA are searched from the parts table specified in the corresponding table instruction data P-FRA of the U-TOC data, and the start address is set to the disk write start address A _WS , the end address to the disk write end address a _WE (F101). Then, the unrecorded area F
It is determined whether the area immediately before the RA is the recording area REA (F102).

Unrecorded area FR to be recorded as shown in FIG.
If there is a recording area REA immediately before A, a position one cluster (M) before the disk write start address A _WS is calculated, and this is set as a past data read start address A _PS (F
103). Then, to access the recording and reproducing head in the past data reading start address A _PS (F104, F105). Then, the disk write start address A _WS is set to the past data read end address A _PE (F106), and the disk write start address A _WS is set to the disk write address AW.
(F107), as shown in the scanning H ₁ of FIG. 5, to perform the read operation from the past data reading start address A _PS to the buffer RAM13 of data recorded on the disk (F 108).

[0053] Here, although writing and reading of the buffer RAM13 is intended to be managed as specified in the write pointer P _W and the read pointer P _R, the write pointer P _W and the read pointer P _R is 8 As shown in (a), an address is designated in the storage area of the buffer RAM 13, and is updated to the next address position every time a write operation or a read operation is performed. Each of them has a ring structure in which after reaching the final address, the address is updated to the head address as shown by the dotted line.

The past data read out after step F108 is sequentially held at the position designated by the write pointer P _W in the buffer RAM 13. For example, the reproduction scan is performed at the past data read end address A _PE (ie, in this case, Until the data reaches the write address AW), the past data is stored in the buffer RA as shown in FIG.
It is held in M13.

[0055] Incidentally, if the previous area was recorded area REA judged not in step F102, since past data reading is not required, sets the innermost disc circumference address the past data reading end address A _PE (F109) After setting the disk write start address _AWS to the disk write address AW (F110), the recording / reproducing head is directly accessed to the disk write address AW (F111). Incidentally, to set the disc innermost address in the past data reading end address A _PE is for use in the comparison process in step (F 122) that will be described later.

When the recording / reproducing head reaches the disk write address AW by reproduction scanning or direct access of the past data, if the reading of the past data has been performed, this is terminated (F112), and then supplied from the terminal 17 Of the input data to be written into the buffer RAM 13 (F
113). Also, an operation of reading the written input data from the buffer RAM 13 and supplying the read input data to the magnetic head 6 to write data on the disk 1 (ie, a write operation to be executed this time) is started (F114). ).

The data to be recorded this time, which has been subjected to the audio compression processing and the like input from the terminal 17, is stored in the buffer RAM 13 following the past data by the write pointer P _W as shown in FIG. . Further, in order to supply it to the magnetic head 6, the read pointer P _R is set to the next address of the area storing the past data during read start, will input data is read at a predetermined timing. The data supplied to the magnetic head 6 records a scan from the disc writing start address A _WS until the disk write end address A _WE is performed is gradually recorded on the disk 1 as of an H ₁ of FIG.

During this recording scan, the system controller 11 sets the position currently being scanned to the current write address A _CW.
And monitors whether the head position has reached the recording end address _AWE (that is, whether A _CW = _AWE ) and whether a track jump has been detected (F115, F116, F117). As described above, track jump detection is performed by monitoring whether a track jump of three or more tracks has been detected by the traverse signal or whether discontinuity has occurred in the absolute position information obtained from the pregroove on the disk. It is.

If the head position reaches the recording end address _AWE without detecting a track jump, it is determined that the recording operation for the segment has been completed normally, and the recording operation for the segment is terminated (F116 → F13).
1) That is, this unrecorded area FRA is
A, the required data of the U-TOC data is changed accordingly, and the U-TOC data on the disk is changed.
The process of rewriting the TOC area is performed (F131), and the disc writing operation is terminated (F132).

Although a detailed description using a flowchart is omitted, data (for example, music) can be recorded over a plurality of segments for such a magneto-optical disk as described with reference to FIG. For,
If the recording of all the data has not yet been completed, the recording is continued by accessing the next unrecorded area FRA when the recording of the first unrecorded area FRA is completed. In this case, similarly, if the next unrecorded area FRA is adjacent to the previously recorded area REA, the past data is read and then the write operation is started. Further, the rewriting of the U-TOC data is executed collectively at the stage when recording of one or a plurality of all segments (unrecorded areas FRA) is completed.

If the system controller 11 detects the occurrence of a track jump during data recording in the unrecorded area FRA, the recording operation is immediately stopped to prevent data destruction (F117 → F118).

Since there is a possibility that the data has already been destroyed at the time of the detection of the occurrence of the track jump, the data is restored by re-recording. Therefore, first, absolute position information after the track jump is detected, and this is set in the address A _TJ immediately after the track jump (F11
9) From this position information, it is determined whether the track jump is to the inner circumference of the disc or to the outer circumference of the disc (F12).
0). That is, the address A _TJ immediately after the track jump is compared with the current write address A _CW .

Although the basic data is destroyed by a track jump within three tracks (the recording operation is immediately stopped when a further track jump occurs.
No data corruption occurs. ), And when a track jump to the disk inner circumference side, for example I reached a recording area REA as indicated scan H ₂ in FIG. 5 with a potential data corruption, as shown as a scanning H ₄ Not It may occur in the recording area FRA.

If A _TJ <A _CW and the track jumps toward the inner circumference of the disk, data destruction occurs from the cluster including the sector immediately before the sector at the address A _TJ immediately after the track jump. since it is considered to have occurred, the address of the first sector of the cluster and the disk rewrite address a _RW (F121).

[0065] Then, it is determined whether the recording and reproducing head by comparing the disc rewriting address A _RW and past data reading end address A _PE has had reached a record area REA (F122). When the recording area REA has been reached (H
₂ ) In order to rewrite the cluster whose data has been destroyed (that is, the cluster indicated by the past data read start address A _PS to the past data read end address A _PE ),
The past data reading start address A _PS sets the disc writing address AW (F123).

On the other hand, if it is a track jump in the unrecorded area FRA (H ₄ ), the position where data destruction is considered to have occurred, that is, the disk rewrite address A _RW (cluster CL ₃₎ calculated in step F121 since it is sufficient to re-write from), and sets the disc rewriting address a _RW on the disc writing address AW (F 124).

The data range (address range on the disk) currently held in the buffer RAM 13 is calculated from the write pointer P _W and the read pointer P _R (F125), and the range for rewriting is calculated. That is, it is checked whether data from the disk write address AW to the address immediately before the track jump (= current write address A _CW ) still remains (F133). If not, rewriting is not possible and the recording operation is terminated as a write error (F13
3) The recording operation is immediately stopped by three or more track jumps, and at least the recording area R
Since data within two tracks including the EA's past data remains, it is usually rewritable.

Therefore, the read pointer P _R in the buffer RAM 13 is set to a data position corresponding to the disk write address AW to start rewriting (F129), and the recording / reproducing head accesses the disk write address AW. (F130), the writing operation is restarted from the disk write address AW (F130 → F112 to F117). Therefore, at the time of track jump occurs in the scanning H ₂ writing is resumed from the past data reading start address A _PS as scanning H _3, will continue to be recorded this time the record data from the cluster CL _1.
Further, at the time of track jump occurs scan H ₄ scan H ₅
Writing is resumed for example from the cluster CL ₃ as.

On the other hand, in step F120, for example, FIG.
If it is determined that a track jump to the outer peripheral side of the disc as shown as a scanning H _6, the address detected last before the track jump occurs, i.e., data records from the sector as the current write address A _CW it is considered that an error has occurred, to calculate the cluster containing that sector and the address of the first sector of the cluster the disc rewriting address a _RW (F127) to. Then, set the disc rewriting address A _RW on the disc writing address AW (F 128), it resumes the recording operation Similarly proceeds to step F 129. Therefore, writing for example from the cluster CL ₅ as in this case the scan H ₇ is resumed.

According to the above-described processing, even if data is destroyed due to a track jump in the unrecorded area FRA or the recorded area REA, the data recovery processing and the recording operation are immediately executed. In this way, data destruction is prevented. In addition, since data up to a predetermined track can be recovered, a track jump can be reliably detected by one or a combination of a traverse signal and discontinuous detection of absolute position information. There is no need to stop, and the recording efficiency is greatly improved.

Although the embodiment has been described above, the amount of past data to be read is not limited to one cluster, but is set according to the capacity of the buffer RAM 13 and the track jump detection method. In addition, although the data of the adjacent recording area before the unrecorded area FRA is read in advance, the data of the adjacent area after the unrecorded area FRA is recorded in the recording area RE
In the case of A, the data of, for example, the first cluster in the recording area may be read into the storage means to prepare for destruction by a track jump to the outer peripheral side.

In the above embodiment, an example in which the present invention is applied to a recording / reproducing apparatus has been described. However, a recording-only apparatus may be used. The present invention is not limited to a magneto-optical disk, but may be applied to a recording device compatible with a recordable optical disk.

[0073]

As described above, according to the present invention, when data such as music is recorded in an unrecorded area, if data in an adjacent area before that is already recorded, the data is recorded in advance before recording is started. By reading a predetermined amount of data, even if a track jump occurs and data is destroyed, it can be recovered by a rewrite operation, and the data can be prevented from being destroyed after all. In addition, the reliability as a recording device can be significantly improved.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of a data structure of user TOC information read by the recording / reproducing apparatus of the embodiment.

FIG. 3 is an explanatory diagram of a segment management state based on correspondence table instruction data and a part table.

FIG. 4 is an explanatory diagram of a track structure of a recording medium according to the embodiment.

FIG. 5 is an explanatory diagram of a recording operation according to the embodiment.

FIG. 6 is an explanatory diagram of a traverse signal in the embodiment.

FIG. 7 is a flowchart illustrating a recording operation of the embodiment.

FIG. 8 is an explanatory diagram of a write / read operation of the buffer RAM of the embodiment.

FIG. 9 is an explanatory diagram of a disk medium capable of recording one music piece in discrete segments.

FIG. 10 is an explanatory diagram of a conventional recording operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magneto-optical disk 3 Optical head 6 Magnetic head 8, 14 Encode / decode part 10 Address decoder 11 System controller 12 Memory controller 13 Buffer RAM 21 TOC memory

Claims (1)

(57) [Claims] A recording / reproducing means for recording / reproducing data on / from a recording medium; a memory means capable of holding data for a predetermined time; a recording / reproducing position by the recording / reproducing means; Control means capable of controlling the holding, when writing predetermined data to a continuous unrecorded area, the previous area adjacent to the unrecorded area is a recording area where data has already been recorded If
First, data reproduction by the recording / reproducing means is executed from a predetermined position in the recording area, the reproduced data is held in the memory means, and when the recording / reproducing means reaches the unrecorded area, the recording / reproducing is performed. And a recording / reproducing apparatus configured to control execution of recording of the predetermined data by means.