JP3163781B2 - Recording device and recording method - 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 and a recording method 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. 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. That is, 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.

For example, as shown in FIG. 10, a first music piece is continuously recorded as a segment T ₁ and a second music piece is continuously recorded as a segment T _2. However, as a fourth music piece and a fifth music piece, segments T _{4 ( 1) to} T ₄ are recorded. _{4 (4)} and T5 _{(1) to} T5 ₍₂₎ as shown in FIG. (Note that FIG. 10 is a schematic diagram, and in practice, 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. 11 (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 at the time. However, due to the influence of vibration or shock 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 will be destroyed (the portion indicated by DS in the figure), and this data cannot be recovered again. Therefore, immediately after a track jump occurs, the recording operation (high level of the laser beam) is performed. It is preferable to interrupt the level output and the application of the magnetic field.

In order to detect a track jump, absolute position information recorded as a pre-groove (wobbling groove) on a disk is detected, and the continuity is monitored. Can be detected accurately, but the track jump of several tracks may already occur during the time delay until the reflected light information from the pre-groove is decoded as the absolute position information. However, this detection method is not enough.

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 problems, and it is intended to prevent data already recorded from being destroyed by a track jump at the time of recording and to improve recording efficiency. It is an object to provide a recording device that can be improved. This is the recording medium
Adjacent to a continuous unrecorded area where data on the body should be recorded
The recording area is the recording area where data has already been recorded.
If it is marked as rear, record in that unrecorded area.
Specified not to record data in the area adjacent to the recording area
Unrecorded area so that a long guard band is formed
Realized by performing data recording in
I do. The guard band part is a continuous unrecorded area to be recorded.
When the recording area is located before and after the rear
Indicates the front end, rear end, or front of the unrecorded area
What is necessary is just to form in both an end part and a rear end part. Also unrecorded
When the recording area is located before the area
Indicates only the front end of the unrecorded area,
If the recording area is located later,
A guard band is formed only at the rear end of the area
Just do it.

For this reason, the present invention relates to an unrecorded area and a recorded area.
Areas exist discretely in a mixture, and the unrecorded area and
And the start address and end address of each recorded area
Data is stored on a recording medium on which management information to be managed is recorded.
In the recording apparatus for recording, the unrecorded area and the recorded
Manages the start address and end address of each
Reading means for reading management information and data recording
The area adjacent to the unrecorded area is the recorded area
Determining means for determining whether or not there is any data on the recording medium;
Recording means for recording data in a recording area;
Adjacent to the unrecorded area where data is to be recorded
If the area to be recorded is determined to be a recorded area,
The management information read by the reading means,
Start corresponding to the unrecorded area to record data
Recording start position based on address and / or end address
And / or offset the recording end position.
Control means for controlling the recording means.

The recording apparatus of the present invention has the following configuration.
To achieve. That is, one continuous segment or multiple
Each unit of data recorded by discrete segments
Segment management data for playback or recording operation
For each recorded data and unrecorded area,
Segment start and end addresses and their
For other segments that are continued from the end address
Other part data storing the start address and end address
Parts tables with link information indicating tables
Management table consisting of one or more unrecorded areas
In the management table, the corresponding 1 or
Of the first part table of the multiple part tables
The correspondence table indicating data indicating the storage location is at least
As a recording device corresponding to the recorded recording medium,
Data reading means for reading data from a recording medium;
The segment management data read by the reading means is stored.
Storage means for holding, and a segment tube held in the storage means
Operation means for performing predetermined operation processing on the physical data.
Be prepared. In particular, this calculation means includes segment
Not supported by the corresponding table instruction data in the
A part table specified to correspond to the recording area
Start address and end address of the segment recorded in
Unrecorded segment that calculates the recordable segment length from
And the calculated unrecorded segment length
To the value twice as long as the guard band length set to the predetermined length.
The comparison means to compare and the unrecorded segment length is guard band
If it is longer than twice the length, the unrecorded segment
Write the start address indicating the start position for the guard band length.
The address shifted in the recording progress direction is used as the recording start address.
Start address calculation means for calculating
When the segment length is longer than twice the guard band length
Is the end address indicating the end position of the unrecorded segment.
Position in the direction opposite to the recording progress direction by the guard band length.
End of recording to calculate the recorded address as the recording end address
Address calculation means. And unrecorded Segume
When recording data to the
The area immediately before the area where data has already been recorded
If it is a recorded area, the recording start address
Want to consider performing some data recorded from the position indicated by the scan
And also after the adjoining unrecorded area
Recorded area where data has already been recorded in the area
Is indicated by the recording end address.
So that data recording can end at
To achieve.

In this configuration, the segment management
Unrecorded segment of a certain unrecorded area obtained from data
G is shorter than twice the guard band length,
The part recorded in the parts table corresponding to the unrecorded area
Parts information corresponding to other unrecorded areas using the link information.
Cable length, the unrecorded segment length is the guard band length
Unrecordable areas longer than twice the
It is a recording area. And recording start address calculating means
Is the part corresponding to the extracted unrecorded segment
The start address stored in the table is equal to the guard band length
Only the address shifted in the recording progress direction
And the recording end address calculating means,
The parts table corresponding to the extracted unrecorded segment
The end address stored in the table for the guard band length
The address shifted in the direction opposite to the recording
It is calculated as a dress.

According to the recording method of the present invention, an unrecorded area and a recorded
The unrecorded area exists discretely in a mixed area.
And start address and end address of each recorded area
Data on a recording medium on which management information for managing
Try to record data in a recording method that records
The area adjacent to the unrecorded area is the recorded area
Determining whether or not to record data,
Area is determined as a recorded area
Unrecorded data to be recorded
Start address and / or end address corresponding to the area
Turn off the recording start position and / or recording end position based on
Controlling the recording head to set.
Be prepared.

Further, the recording method of the present invention provides one continuous
Recorded by segment or multiple discrete segments
Reproduce or record data of each unit
Data recorded as segment management data for
For the data and unrecorded area, the starting address of the segment
From the end address and the end address
Start address and end address for other segments
Has link information indicating other part tables in which
Management table consisting of a plurality of parts tables
Or, for a plurality of unrecorded areas,
Of one or more parts tables corresponding to
Corresponding data indicating the storage location of the first parts table
Recording instruction data and at least a recording medium
The following steps are provided as a recording method for the body. Immediately
A corresponding table instruction in the segment management data
Certain data specified to correspond to unrecorded areas
Start address of the segment recorded in the parts table
From the end address and the recordable unrecorded segment
Length calculation step to calculate the segment length of
And the calculated unrecorded segment length is set to a predetermined length.
Comparison step to compare with twice the guard band length
And the unrecorded segment length is more than twice the guard band length
If long, indicates the starting position of the unrecorded segment
The start address is recorded by the guard band length.
Calculate the address shifted in the direction as the recording start address
Recording start address calculation step to perform
If the guard length is longer than twice the guard band length,
The end address indicating the end position of the unrecorded segment is
Shift by the guard band length in the direction opposite to the recording progress direction.
End of recording to calculate the recorded address as the recording end address
Address calculation step; and
When performing data recording, the
Area is already recorded data.
If the recording start address is
Data recording is executed from the position indicated by
The area adjacent to the unrecorded area is already recorded data
If it is a recorded area with
Data recording at the position indicated by the recording end address
Control step for controlling the recording head so that the printing is terminated
And.

In the comparing step, the seg
Not recorded in a certain unrecorded area obtained from the data
If the recorded segment length is shorter than twice the guard band length
Parts table corresponding to the unrecorded area
To the other unrecorded area using the link information recorded in the
Search the corresponding parts table and find the unrecorded segment length
Extracts unrecorded areas longer than twice the guard band length
Unrecorded area extraction
A recording start address calculation step.
In step, extracted in the unrecorded area extraction step
Recorded in the parts table corresponding to the unrecorded segment
Recording of the starting address that has been performed for the length of the guard band
Calculate the address shifted in the direction as the recording start address
In the recording end address calculation step,
To the unrecorded segment extracted in the recording area extraction step
Before the end address stored in the corresponding parts table
Shift by the guard band length in the direction opposite to the recording progress direction
Calculated as the recording end address.
You.

[0017]

By providing a guard band portion, a small number of tracks (for example, two tracks) cannot be distinguished from detection of a traverse signal by the influence of dust on a disk or an actual track jump, depending on the guard band length. ), The recording head will not move from the unrecorded area to the previously recorded recording area, and the past recorded data will not be destroyed. Of course, if the signal is a traverse signal due to dust, the recording may be continued as it is. That is,
In such a case, it is not always necessary to interrupt the recording operation one by one. Note that the data that is actually destroyed even in the case of a track jump is data that has just been written in the current recording operation, and can be recovered by rewriting in most cases.

Further, a track jump of a large number of tracks (for example, three or more tracks) in which the optical head may move to the recording area can be detected almost accurately and quickly by a traverse signal. In this case, if the recording operation is immediately interrupted, it is possible to prevent irrecoverable destruction of past data.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a recording apparatus and a recording method 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 user TOC is stored on the magneto-optical disk corresponding to
The segment management data written as information will be described, and then the operation of this 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 the recording track to the Curie temperature at the time of recording, and is reflected by the 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 into contact with and separating from 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 for applying 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.587, 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 parts tables from (01) to (FF) are provided as management tables, and each part table has a start address as a starting point, an end address as an end, and an end address for 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 mode information of the track records, for example, information on whether the segment is set to prohibit overwriting or data copying, whether the segment is audio information, and a monaural / stereo type. 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 by connecting two segments, the position of the segment is managed by three parts tables connected 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 part table from (01) to (FF) in the management table corresponds to the corresponding table instruction data (P-DFA to P-DF).
TNO255) indicates the contents of the segment.

The P-DFA indicates a defect area on the magneto-optical disk 1, and indicates a track portion (= segment) serving as a defect area due to a scratch or the like in one or more 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 there is an unused part table, the corresponding table instruction data P-EMPTY is set as P-EMPTY. (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 to be an unrecorded area 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 tune, the track is not divided on the disc (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 in a plurality of segments on the disc, for example, each segment is designated in order of time 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. However, when a recording area is adjacent before or after the unrecorded area. Is to form a guard band on which data is not recorded at the front end and / or the rear end of the unrecorded area. Then, a criterion for determining whether or not a track jump has occurred during recording is determined according to a preset guard band length, so that the re-recording operation is efficiently executed. 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−) consisting of a 4-sector (1 sector = 2352 bytes) sub-data area and a 32-sector main data area 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 of addresses A ₁ -A ₂ including a plurality of clusters CL ₁ -CL ₉ is assumed to be an unrecorded area FRA, and a recording area before and after that is recorded. Assume the case of REA. The addresses A ₁ and A ₂ are, as U-TOC data, the start address and the start address in the parts table specified in the corresponding table designation data P-FRA (or any of the parts tables linked from the parts table by link information). It is stored as an end address.

In this embodiment, the recording operation is performed such that a guard band GB where data recording is not performed in a portion adjacent to the recording area REA has a length of, for example, one cluster. That performs an operation of the start address A ₁ from one cluster destination A ₃ an address indicating the recording start position in the system controller 11, also the recording end position address end address A ₂ from one cluster before showing set the recording region by performing an operation of the a _4, performs a recording operation. Thus the recording head is addressed A ₃ to A ₄ as shown in figure H ₁
Scanning is performed in sections. Therefore, the clusters CL ₁ and CL ₉
Is a guard band GB where no data is recorded.

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. Then, if possible, a re-recording operation is performed. For example, FIG. 5 when the scanning H ₄ or H track jump TJ as indicated ₅ occurs in the unrecorded area is often possible re-recorded.

When two or less traverse signals occur sporadically as shown in FIG. 6B, for example, it is regarded as the influence of dust on the disk, and the recording operation is continued as it is.

Even when two or less traverse signals occur sporadically, even if a track jump of two tracks or less actually occurs, the guard band GB is formed for one cluster (two to three tracks). since the scanning state of the recording head in that case, as shown as H ₂ or H ₃ in FIG. 5, the recording area RE of the outer than the guard band GB
It does not reach A. Therefore, it does not extend to the destruction of past recorded data. The determination as to whether or not the track is an actual track jump is accurately performed by checking the continuity of the absolute position information by the pre-groove on the disk. In the case of the track jump, measures such as re-recording are taken.

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 denoted by F101 to F123.
When the magneto-optical disk 1 is loaded, the TOC information is read as described above, and thus the U-TOC of FIG.
The data is also stored in the TOC memory 21, but when the user performs a recording operation from the operation input unit 19, for example, the system controller 11 uses the U-TOC data as shown in FIG.
Is performed.

First, the start address and the 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 (F101, F102). Then, the segment length of the unrecorded area FRA, that is, (end address)
-(Start address) is twice the guard band length (=
It is determined whether it is longer than (2 clusters) (F103). if,
If the segment length ≦ twice the guard band length, the unrecorded area FRA cannot be recorded and the unrecorded area FRA
The next linked parts table is searched from the parts table indicating the RA, and the segment length is calculated from the start address and the end address. That is, in steps F101 to F103, an unrecorded area FRA having a segment length> twice the guard band length is found,
This is the area to be recorded.

[0054] When the unrecorded area FRA to be recorded is specified, the guard band G than the start address A ₁
B length (one cluster) address of the position after only partial calculating as a recording start address A ₃ (F 104). Also, the address at the position before the end address A ₂ by the guard band GB length (one cluster) is set as the recording end address A ₄
(F105).

When the recording start address A ₃ and the recording end address A ₄ are calculated, the recording head is made to access the recording start address A ₃ and the recording of data is started from the address A ₃ (F106, F107, F108). That recording scan as of an H ₁ of FIG. 5 is started, the data supplied to the magnetic head 6 via the buffer RAM13 are recorded.

[0056] During this recording scan, the system controller 11, or the head position has reached the recording end address A _4, or 3 or more tracks of a track jump is detected by the traverse signal, and, from the pregroove on the disc It is monitored whether a discontinuity is detected in the absolute position information obtained (F109, F110, F111).

[0057] As 3 when the head position while discontinuity is not detected in tracks above the traverse signal or absolute position information has reached the recording end address A _4, the recording operation for that segment has completed normally, that segment Is completed (F109 → F122), and the unrecorded area FRA becomes the recording area REA. Accordingly, necessary data of the U-TOC data is changed and the A process of rewriting the U-TOC area is performed (F123).

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. Therefore, if all data has not been recorded yet,
The first unrecorded area F as shown in FIG. 9 as scan H ₆
When the recording of RA ₁ is completed, the next unrecorded area FRA
Access to ₂ will continue the recording. In this case, the recorded between the address A ₃ to A ₄ as the guard band GB as well for the next unrecorded area FRA ₂ is formed is carried out. And actually U-T
The rewriting of the OC data is executed collectively at the stage when recording of one or a plurality of all segments (unrecorded areas FRA) is completed.

During data recording in the unrecorded area FRA, the system controller 11 monitors the traverse signal. If the traverse signal is within two tracks, the system controller 11 ignores this signal and continues the recording operation. When a traverse signal for three tracks is detected, the recording operation is immediately stopped to prevent data destruction assuming that a track jump has occurred (F110 → F112).

Since there is a possibility that the data has already been destroyed at the time of detection of the occurrence of the track jump, if the data can be restored by re-recording, this is performed. Particularly in the case of the present embodiment, the guard band GB
Accordingly, the recording head does not reach outside the unrecorded area FRA where the recording is performed this time due to the track jump of three tracks. Therefore, for example, data recovery is possible in most cases by the data remaining in the buffer RAM 13. By performing the recording stop processing as described above, data separated by three or more tracks will not be destroyed.

Therefore, the absolute position information after the track jump is detected (F113), and it is determined from this position information whether the track jump is to the inner circumference side of the disk or to the outer circumference side of the disk (F114).

For example, when a track jump from the cluster CL ₇ to the cluster CL ₅ to the inner circumference side of the disk is performed as shown as a scan H _{4 in} FIG. 5, one sector before the sector including the read absolute position information is performed. it is considered from a cluster having a sector (CL ₄ or CL ₅₎ and data destruction has occurred, the previous cluster (CL ₄ or C
L ₅₎ to calculate the (F115). On the other hand, if the track jump is from the cluster CL ₃ to the outer circumference of the disk as shown as a scan H _{5 in} FIG. 5, the cluster (CL) having the sector including the absolute position information detected last before the track jump occurs. _Since it is considered that an error has occurred in the data recording from ₃ ), a cluster (CL ₃ ) including the absolute position information before the track jump is calculated (F116).

By the way, even when a traverse signal within two tracks is detected, a track jump may actually occur and a recording error or data destruction may occur in an unrecorded area FRA where recording is currently being performed. (for example, as shown with H ₂ or H ₃ in FIG. 5), the continuity of the absolute position information as described above is being monitored. Then, when the discontinuity occurs, the recording is stopped assuming that the track jump has occurred (F111 → F117). Then, a cluster to start re-recording for data restoration or error elimination is calculated (F118). Here, the cluster from which re-recording is to be started includes a cluster CL including the address immediately before the continuity of the absolute position information is broken, and a cluster including the address immediately before the address at which the discontinuity of the absolute position information is detected. Among the CLs, the cluster CL is located on the inner peripheral side.

When the cluster to be re-recorded is calculated in any of steps F115, F116 and F118, it is determined whether or not the data recorded from that cluster to the cluster where the track jump has occurred still remains in the buffer RAM 13. It is determined (F119). If it does not remain, data recovery by re-recording is impossible, so the process ends as a recording error (F120), but if it remains, the calculated start address of the cluster is set as the recording start address, and Resume data recording from cluster (F121
→ F106).

By the above processing, the guard band GB is formed in the unrecorded area FRA to perform the recording operation, and the track jump is such that the guard band GB does not cause the recording head to enter another area. If the possibility is detected, this is not immediately regarded as a track jump. Then, the recording operation is continued until the track jump is accurately confirmed by the discontinuity of the absolute position information. That is, recording is not interrupted by an incorrect traverse signal due to dust or the like. When a track jump occurs, the data recovery process and the recording operation are immediately executed.

In the process of this flowchart, a guard band GB is formed in all the unrecorded areas FRA where the recording operation is performed, but actually, the recording area REA is formed before and after the unrecorded area. When they are not adjacent to each other, it is not always necessary to provide the guard band GB. Further, it is preferable that no data is provided because a large amount of data can be recorded.

Therefore, the processing of steps F101 to F105 in FIG. 7 is preferably performed in steps F201 to F217 of FIG. That is, when an unrecorded area FRA is found at the start of recording (F201, F202), first, it is determined whether both adjacent areas before and after the area are the recording area REA (F20).
3). If the front and rear are the recording area REA, FIG.
Twice segment length of the guard band length as well (2 clusters) to determine longer or not than (F 204), as a recordable area the longer, the flag F _F, and turns on the F _R ( F205).

If both of the extracted unrecorded area FRA and the extracted unrecorded area FRA are not the recording area REA, it is determined whether one of the front and the rear is the recording area REA (F206), and one is the recording area REA. In this case, it is only necessary to provide the guard band GB on one side, so it is determined whether or not the segment length is longer than the guard band length (one cluster) (F20).
7). And as a recordable area longer than the guard band length, Izure around but to determine recording area REA (F 208), before the ON flag F _F if recording area, to turn off the flag F _R (F209). After addition off the flag F _F if recording area, and turns on the flag F _R
(F210).

Further, if neither the front nor the rear is the recording area REA, it is not necessary to provide the guard band GB, and it is determined that the area is a recordable area as it is, and the flags _FF , F
_R is turned off (F211).

When the flag _FF is on,
The recording start address (A ₃ ) is the start address A ₁ so that the guard band GB is formed at the front end of the segment.
(F212)
→ F213). On the other hand, when the flag F _F is off, it is used as it is the start address A ₁ is a recording start address (F212 → F214). That is, in this case, the guard band GB is not formed at the front end of the unrecorded area FRA.

When the flag F _R is on, the recording end address (A ₄ ) is obtained by subtracting the guard band length from the end address A ₂ so that a guard band GB is formed at the rear end of the segment. Address (F215
→ F216). On the other hand, when the flag F _R is off, is used as it is an end address A ₂ as a recording end address (F215 → F217). That is, in this case, the guard band GB is not formed at the rear end of the unrecorded area FRA.

Thereafter, the process proceeds to step F106 in FIG. 7, and the above-described operation is performed. As a result, the recordable area can be effectively used.

Although the embodiments have been described above, in some cases, the guard band is provided at one of the front end and the rear end of the unrecorded area regardless of whether the adjacent area is the recording area REA. Is also conceivable.

Although the track jump is determined based on the traverse signal in three or more tracks, this is determined in correlation with the setting of the guard band length.
If the guard band length is long, for example, it may be determined that a track jump has occurred for the first time by a traverse signal for four or more tracks. In other words, a traverse signal having a track jump number that does not cause the segment being recorded to escape from the segment being recorded due to the guard band length can be regarded as a detection error due to dust or the like. This is because the recorded data is not destroyed. By setting the guard band length and the track jump detection reference so as to have a correlation in this way, it is possible to improve the efficiency of the recording operation,
Accurate and quick track jump detection for preventing data destruction in the past can be obtained, thereby reliably preventing destruction of recorded data.

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.

[0076]

As described above, according to the present invention, when data such as music is recorded in an unrecorded area, a guard band is formed at one or both of the front end and the rear end thereof. Therefore, it is sufficient to consider that a track jump occurs when a traverse signal detects a track jump equal to or more than a predetermined number of tracks corresponding to the guard band length, and the track jump detection for preventing destruction of past recorded data can be accurately performed. And quickly. Also,
The detection of a track jump by a traverse signal less than a predetermined number does not have to execute the recording operation stop one by one, considering this as an erroneous detection. For this reason, it is possible to reliably prevent the destruction of past data due to a track jump at the time of recording, and to improve the efficiency of the data recording operation.

[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 a flowchart illustrating a recording operation of the embodiment.

FIG. 9 is an explanatory diagram of a recording operation over a plurality of segments according to the embodiment.

FIG. 10 is an explanatory diagram of a disk medium capable of recording one music piece in discrete segments.

FIG. 11 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 (6)

(57) [Claims] An unrecorded area and a recorded area are mixed.
Discretely exist, the unrecorded area and the recorded area
Management information that manages each start address and end address
For recording data on a recording medium on which is recorded
At the start address of each of the unrecorded area and the recorded area.
For reading the management information for managing the address and end address
Column and the area adjacent to the unrecorded area where data is to be recorded.
Discriminating means for discriminating whether the data is a recorded area, and recording for recording data in an unrecorded area on the recording medium.
Means and an unrecorded data to be recorded by the discriminating means.
When the area adjacent to the rear is determined as a recorded area
In the management information read by the reading means,
To the unrecorded area where the data recording is to be performed.
Based on the corresponding start address and / or end address,
Offset recording start position and / or recording end position
A control means for controlling the recording means as described above . 2. Recorded data and unrecorded data as segment management data for reproducing or recording data of each unit recorded by one continuous segment or a plurality of discrete segments. A management table consisting of a plurality of part tables having link information indicating the start address and the end address of the segment and other part tables in which the start address and the end address of other segments continuous from the end address are stored. And at least one correspondence table instruction data indicating a storage position of a leading part table of the one or more part tables corresponding to the one or more unrecorded areas in the management table. A recording device corresponding to a medium, comprising: Data reading means for reading data from the storage means, storage means for holding the segment management data read by the data reading means, and arithmetic means for performing predetermined arithmetic processing on the segment management data read into the storage means. The arithmetic means comprises: a segment length recordable from a start address and an end address of a segment recorded in a certain part table designated to correspond to an unrecorded area by the correspondence table instruction data in the segment management data. An unrecorded segment length calculating means for calculating the calculated unrecorded segment length, and a comparing means for comparing the calculated unrecorded segment length with a value twice the guard band length set to a predetermined length. If it is longer than twice, it indicates the starting position of the unrecorded segment A recording start address calculating means for calculating, as a recording start address, an address obtained by shifting the starting address in the recording progress direction by the guard band length; and when the unrecorded segment length is longer than twice the guard band length, Recording end address calculating means for calculating, as a recording end address, an address obtained by shifting the end address indicating the end position of the unrecorded segment by the guard band length in the direction opposite to the recording progress direction, and in carrying out the data recorded in the recording segment, wherein when the area of the front adjacent to the unrecorded area has already been a recorded area in which recording has been made of the data, data from the location indicated by the recording start address Recording can be performed, and the subsequent air adjacent to the unrecorded area can be recorded. If the A is already a recorded area in which recording of data is performed,
A recording apparatus configured to end data recording at a position indicated by the recording end address. 3. If the unrecorded segment length of a certain unrecorded area obtained from the segment management data is shorter than twice the guard band length, the information is recorded in the parts table corresponding to the unrecorded area. A part table corresponding to another unrecorded area is searched using the link information, and an unrecorded area having an unrecorded segment length longer than twice the guard band length is extracted as a recordable unrecorded area, The recording start address calculation means calculates an address obtained by shifting the starting address stored in the parts table corresponding to the extracted unrecorded segment by the guard band length in the recording progress direction as a recording start address, The recording end address calculation means calculates the end address stored in the parts table corresponding to the extracted unrecorded segment. Claims the less is characterized in that to calculate the address shifted in the recording direction opposite to the traveling direction by the guard band length min as a recording end address
3. The recording device according to 2 . 4. An unrecorded area and a recorded area are mixed.
Discretely exist, the unrecorded area and the recorded area
Management information that manages each start address and end address
Recording method for recording data on a recording medium on which is recorded
In the area adjacent to the unrecorded area where data is to be recorded
Determining whether or not the area is a recorded area; and an area adjacent to an unrecorded area for which data recording is to be performed.
Data is determined to be a recorded area, the data
Start address corresponding to the unrecorded area to be recorded
And / or the recording start position and / or
Or, set the recording head so that the recording end position is offset.
And a controlling step . 5. A continuous segment or a plurality of spaced segments.
Each unit of data recorded by discrete segments
Segment management data for playback or recording operation
For each recorded data and unrecorded area,
Start address, end address, and end address
Address of another segment that is continued from
Shows another part table that stores the
Consisting of multiple parts tables with link information
Management table, and for one or more unrecorded areas, the management table
One or more parts tables corresponding to it
Of the part table at the beginning of the table
Recording instruction on a recording medium on which at least the cable instruction data is recorded
As the corresponding table instruction data in the segment management data.
Some paths designated as corresponding to the unrecorded area A by chromatography data
The start address of the segment recorded in the
From the end address, the recordable unrecorded segment
A segment length calculation step for calculating a segment length, and the calculated unrecorded segment length is set to a predetermined length.
A comparison step of comparing with a value twice as long as the guard band length, and an unrecorded segment length longer than twice the guard band length
In the case, the above indicates the starting position of the unrecorded segment.
The starting address is the recording progress direction by the guard band length.
Calculated as the recording start address
Recording start address calculation step, and the unrecorded segment length is longer than twice the guard band length
In the case, the above indicates the end position of the unrecorded segment.
Set the end address in the recording progress direction by the guard band length.
The address shifted in the opposite direction to the recording end address
Calculating a recording end address, and performing data recording on the unrecorded segment,
The area before the unrecorded area is already recorded data
If it is a recorded area with
Data recording starts from the position indicated by the recording start address.
Recording is performed, and after the adjacent to the unrecorded area
Recorded area where data has already been recorded in the area
If the recording end address is
Record head so that data recording ends at the indicated position.
And a control step of controlling the recording method. 6. The method according to claim 1, wherein the comparing step includes :
Unrecorded in a certain unrecorded area obtained from the event management data
Segment length is shorter than twice the guard band length
The parts table corresponding to the unrecorded area
Use the link information recorded in the
Search the corresponding parts table and find the unrecorded segment length
Extract unrecorded areas longer than twice the guard band length
Unrecorded area extraction step
The recording start address calculating step, the unrecorded
Supports unrecorded segments extracted in the rear extraction step
The starting address stored in the parts table
Address shifted in the recording direction by the
Calculated as a recording start address, the recording end address calculating step, the unrecorded et
Supports unrecorded segments extracted in the rear extraction step
The end address stored in the part table
In the direction opposite to the recording progress direction by the
Dress is calculated as the recording end address.
6. The recording method according to claim 5, wherein: