JPH1173736A - Optical disk recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the retrieval of recorded ISRCs(international standard recording codes) in a short time when data are written into a track of a writable optical disk, by recording the ISRCs more than the number prescribed in a specification sheet on sub-code of the specific area of this track. SOLUTION: By a driving controller 7, etc., the whole body is controlled, and the decision is made whether the write-in is executed on a head part of the track or not when the track of the writable optical disk 1 is written by an optical pickup 4. When the write-in of the head part is executed, the international standard recording codes (ISRCs) are recorded more than the number prescribed in the specification sheet on the sub-code of the head part, and when the write-in is not on the head part, one ISRC is recorded on 100 blocks. Next, the decision is made whether the write-in of the track is completed or not, and the process is returned to the initial stage when the write-in is not completed, and this process is finished when the write-in is completed. Thus, the ISRCs are quickly retrieved, and the time to read out the ISRCs from the track is remarkably reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD in which tracks are formed on a writable optical disc such as a CD-R disc, a CD-RW disc, and data is written and recorded.
-R drive device, CD-RW drive device, DVD-
The present invention relates to an optical disk recording device such as a RAM drive device.

[0002]

2. Description of the Related Art Optical discs such as compact disc digital audio (CD-DA disc) and compact disc ROM (CD-ROM) have an international standard recording code (Intern) as a subcode for each track.
national Standard Record C
mode: ISRC).

This ISRC is a compact disc digital audio system specification (CD-DA SYS).
TEM DESCRIPTION, popular name: RED BO
OK) and Compact Disc ROM System Specification (CD-ROM SYSTEMDESCRIPTION)
N, commonly known as YELLOW BOOK), and is used as an identification code for music data and a management code for specifying copy data.

[0004] In these standards, at least one track is required.
It is stipulated that the ISRC should be recorded at a rate of one block per 00 blocks, and the ISRC is recorded in one out of 100 blocks per track on a normal optical disc.

Conventionally, a CD-R drive device which forms tracks on a writable optical disk such as a compact disk recordable (CD-R disk) and a compact disk rewritable (CD-RW disk) to write and record data. , CD-RW drive device, DV
In an optical disk recording device such as a D-RAM drive device,
The ISRC is recorded at a rate of one block per 100 blocks for each track of a writable optical disk based on the above-mentioned standard specification.
Since SRC is a unique code for each track, IRC
When reading the SRC, each track had to be read.

[0006]

However, in the conventional optical disk recording apparatus, the ratio of IS to the ratio of one block to 100 blocks per writable optical disk track is increased.
Since the RC is recorded, a maximum of 100 blocks may have to be read in order to search and read the ISRC from the track, and there is a problem that it takes time to read the ISRC.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in consideration of an ISRC recorded on a writable optical disk.
It is an object of the present invention to be able to search for in a short time.

[0008]

In order to achieve the above object, the present invention provides an optical disk recording apparatus having means for writing and recording data on a track of a writable optical disk. When writing data, the international standard recording code (ISR
Means for recording the number C) more than the number specified in the standard.

It is preferable to provide a means for setting the specific area at the head of the track. Further, it is preferable to provide means for setting the specific area at a pre-gap part and a head part of the track.

In the optical disk recording apparatus according to the present invention, when data is written on a track of a writable optical disk, an ISRC is added to a subcode of a specific area of the track.
Is recorded more than the number specified in the standard.
RC can be searched in a short time.
The time for reading the RC can be reduced.

If the specific area is set at the head of the track, more ISRCs than the number specified by the standard can be recorded in the specific area located at the head of the track. By starting reading from the beginning of the track by the ISRC search operation, the ISRC search can be performed in a shorter time.
Can be further reduced.

Further, if the specific area is set at the head of the track and the pre-gap part, the number of ISRCs more than the number specified by the standard in the pre-gap part together with the specific area located at the head of the track. Can be recorded, and when the beginning of a track is accessed, the ISRC of the pre-gap portion can be read before reaching the beginning of the next track. The reading time can be further reduced.

[0013]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a block diagram showing the configuration of the optical disk recording device according to one embodiment of the present invention. The optical disk recording apparatus includes a motor 2 for rotating an optical disk (hereinafter, referred to as an “optical disk”) 1 on which data can be written, such as a CD-R disk and a CD-RW disk, at an arbitrary rotation speed, and a rotation of the motor 2. A rotation control unit 3 for controlling the rotation speed by changing the number is provided.

An optical pickup 4 for irradiating a semiconductor laser (laser light) L on the recording surface of the optical disk 1 during data recording and data reproduction, and an actuator control unit 5 for moving the optical pickup 4 in the radial direction of the optical disk 1.
And a signal control unit 6 for detecting a signal from the optical pickup 4.

Further, a CPU and a memory such as a ROM and a RAM of a storage area used when the CPU performs various processes are built in to control the entire optical disk recording apparatus, read / write data to / from the buffer 8 and read / write data from / to the buffer 8. A drive controller 7 for executing various processes according to the present invention, such as one track write process, is provided.

Further, a buffer 8 for storing data transferred from the host device 11, a laser drive circuit 9 for controlling the irradiation of the laser beam L of the optical pickup 4 in accordance with an instruction sent from the drive controller 7, and an optical disk recording circuit It controls the interface with the host device 11 which is a personal computer that controls the device, and
1 is provided with an external interface 10 for sending data transferred from the drive controller 1 to the drive controller 7.

That is, the drive controller 7 or the like writes and records data on a track of a writable optical disk, and when writing data on a track of a writable optical disk, the sub-code of a specific area of the track is Standard recording code (I
SRC) functions as a means for recording more than the number specified in the standard.

Also, it functions as means for setting the specific area at the head of the track. Further, it functions as means for setting the specific area at the pre-gap part and the head part of the track.

Next, the format of the optical disk 1 will be described. FIG. 3 is a diagram showing a track format, and FIG. 4 is a diagram showing a block format.
As shown in FIG. 3, the track is a link block (LI
NKBLOCK), run-in block (RUN-IN)
BLOCK), a pre-gap portion (PRE-GAP), a user data area (USER DATA AREA), and a run-out block (RUN-OUT BLOCK). A pre-gap is always written before user data.

As shown in FIG. 4, a block is composed of 98 frames, and one frame is composed of 588 channel bits, and is composed of areas of frame synchronization, subcoding, data and parity. The information is recorded on the optical disc 1 in frame order. That is, frame synchronization of frame 0, subcoding, data and parity, frame synchronization of frame 1, subcoding, data and parity,..., Frame synchronization of frame 98, subcoding, data and parity are recorded in this order.

The data portion of data and parity (2352 bytes) contains one block of CD-DA and CD-ROM (XA). “S0” and “S1” represent synchronization patterns. The subcoding includes P, Q, R, S, T, U,
There are V and W channels, which are used when the optical disk recording device controls and displays data on the optical disk 1. The P channel is a track separator (Tra
ck Separator). Also,
The Q channel has more detailed control information,
The ISRC is recorded. Further, the R to W channels are not normally used.

Next, the recording process of ISRC at the time of track writing in this optical disk recording apparatus will be described.
FIG. 1 is a flowchart showing the processing. In this process, at the time of writing a track on the optical disc 1, it is determined in step (indicated by "S" in the figure) 1 whether or not a specific area of the track is to be written. The ISRC is recorded in the area more than the predetermined number, and the process proceeds to step 3 to determine whether or not the writing of the track is completed. If not, the process returns to the first process.

If it is determined in step 1 that the writing of the specific area is not performed, the ISRC is recorded at a rate of one in 100 blocks, and the flow proceeds to step 3 to determine whether or not the writing of the track is completed. .

The specific area is an area defined for writing an ISRC in a track, and an area set in a conventional optical disk recording apparatus may be used. In addition, the predetermined number is set to a number larger than the number specified in a standard book such as Yellow Book or Red Book.
For example, it is preferable that the predetermined number is determined so that one block is written in 10 to 20 blocks in a specific area of the track.
In addition, the standard document states that ISR
It is stipulated that C be written.

As described above, when writing the ISRC in the track, since the number of writing is larger than the number specified in the standard, the search can be performed by reading only the number of blocks smaller than the conventional one, and the reading time of the ISRC can be reduced. Can be shortened.

Further, the optical disk on which the ISRC is recorded by the above-described processing is transferred to a conventional CD-ROM drive,
When used in an optical disk recording device such as a DR drive device or a CD-RW drive device, a search can be performed in a shorter time than when one ISRC is searched from 100 blocks in a predetermined area in a track. Reading of ISRC can be performed at high speed.

Next, a process of recording an ISRC at the head of a track when writing a track in the optical disk recording apparatus will be described. FIG. 5 is a flowchart showing the processing.

In this process, at the time of writing a track on the optical disc 1, it is determined in step (indicated by "S" in the figure) 11 whether or not the head of the track is to be written. The process proceeds to record more ISRCs at the beginning than the predetermined number, and proceeds to step 13 to determine whether or not the writing of the track has been completed. If not completed, the process returns to the first process.

If it is determined in step 11 that the writing of the head of the track has not been performed, the ISRC is recorded at a rate of one in 100 blocks, and the flow proceeds to step 13 to determine whether or not the writing of the track has been completed. Finish.

In this way, more ISRCs are written at the beginning of the track than the number specified in the standard. By starting reading from the beginning of the track by a normal ISRC search operation, the ISRC can be read more quickly than before. The search can be performed, and the time for reading the ISRC from the track can be significantly reduced.

Further, the optical disk on which the ISRC is recorded by the above-described processing is transferred to a conventional CD-ROM drive,
When used in an optical disk recording device such as a DR drive device or a CD-RW drive device, ISRC retrieval can be performed at high speed by searching for ISRC from the beginning of the track.

Next, at the time of track writing in this optical disk recording apparatus, the I
The process of recording the SRC will be described. FIG. 6 is a flowchart showing the processing.

In this process, at the time of writing a track on the optical disc 1, in step (indicated by "S" in the figure) 21, ISRC is recorded in a pre-gap portion of the track more than a predetermined number.
Proceeding to step 22, the ISRC is recorded more than a predetermined number at the head of the track, and proceeding to step 23, the ISRC is recorded at a rate of one block per 100 blocks in the remaining area of the track, and this processing ends.

As described above, the number of ISRs in the pregap portion and the head portion of the track is larger than that specified in the standard.
Since C is written, when accessing the beginning of a track, the ISRC of the pre-gap portion can be read before reaching the beginning of the next track, thereby avoiding rotation waiting when accessing the beginning of each track. Thus, the time for reading the ISRC from the track can be further reduced.

[0035]

As described above, according to the optical disk recording apparatus of the present invention, the ISRC recorded on the writable optical disk can be searched in a short time.
SRC reading can be performed quickly.

[Brief description of the drawings]

FIG. 1 is a flowchart showing ISRC recording processing at the time of track writing in an optical disc recording apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of an optical disk recording device according to an embodiment of the present invention.

FIG. 3 is a diagram showing a track format of a writable optical disk.

FIG. 4 is a diagram showing a format of a block of the track shown in FIG. 3;

FIG. 5 is a flowchart showing a process of recording an ISRC at a head of a track in the optical disc recording device according to the embodiment of the present invention.

FIG. 6 is a flowchart showing a process of recording an ISRC at a pre-gap portion and a head portion of a track in the optical disc recording device of one embodiment of the present invention.

[Explanation of symbols]

 1: Optical disk 2: Motor 3: Rotation control unit 4: Optical pickup unit 5: Actuator control unit 6: Signal control unit 7: Drive controller 8: Buffer 9: Laser drive circuit 10: External interface 11: Host device

Claims (3)

[Claims] 1. An optical disc recording apparatus comprising means for writing and recording data on a track of a writable optical disc, wherein when writing data on a track of the writable optical disc, a sub-code of a specific area of the track is internationally recorded. An optical disc recording apparatus comprising means for recording more standard recording codes than the number specified in a standard document. 2. The optical disk recording apparatus according to claim 1, further comprising means for setting the specific area at the beginning of a track. 3. The optical disc recording apparatus according to claim 1, further comprising means for setting the specific area at a pre-gap portion and a head portion of a track.