JP3016265B2 - Optical disc 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 rewritable and recordable optical disk recording method.

[0002]

2. Description of the Related Art As conventional optical disks, rewritable optical disks (referred to as CD-ROMs), rewritable optical disks (referred to as CD-WOs), and rewritable optical disks (MOs) are available. Optical disks are known. In accordance with the characteristics of these optical disks, dedicated recording / reproducing drive devices are usually used. Regarding the physical format, CD-R
OM and CD-WO have compatibility.

[0003]

As for the data format, the logical format of the CD-ROM, that is, the file structure is based on ISO966.
It is a standard of 0 and is unified almost all over the world. Meanwhile, CD
Data format of -W O is not this <br/> standards have been adopted by all of the CD-WO. Therefore, even if the physical format is the same, it is impossible to reproduce all CD-WOs with a CD-ROM drive device.

Accordingly, an object of the present invention is to provide a recording method for an optical disc which enables reproduction of a CD-WO by using an optical disc of another format having the same physical format as the CD-WO, for example, a CD-ROM drive device. To provide.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method for recording data at a predetermined position on a recordable optical disk which is not rewritable and capable of maintaining data compatibility when the data recording is completed. detecting the flag information representing whether the flag
When the result of detecting the information indicates that data compatibility is to be provided, in order to provide logical compatibility of data in a data recording area, which is on the inner side of a predetermined position. This is a recording method of an optical disk for recording data representing a data structure required for the optical disk.

[0006]

By matching the structure information to that of the optical disk of another format, the information written on the optical disk can be reproduced by the drive device of the optical disk of another format, and the compatibility of the optical disk can be improved.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a drive device of an optical disk, for example, a CD-WO for implementing the present invention. However, FIG. 1 shows only the configuration of the recording system for simplicity. In FIG. 1, 1 indicates a CD-WO. This CD-WO 1 is rotated at a constant linear velocity (CLV) by the spindle motor 2 in the same manner as a CD-ROM. The CD-WO1 is compatible with the CD-ROM in physical format, that is, in size, track format, optical characteristics, and the like. In order to have the characteristics as WO, a drilling type in which a change in geometrical shape is caused by a recording laser beam as conventionally known,
A recording medium of a phase change type or the like may be used.

An optical pickup 3 is moved by a feed motor 4 in the radial direction of the CD-WO 1. The optical pickup 3 has a semiconductor laser and an optical system.
Is incident on the recording surface of the CD-WO1. The spindle motor 2 and the feed motor 4 are controlled by a servo circuit 5. A control signal from the system controller 6 is supplied to the servo circuit 5. Under the control of the system controller 6, the optical pickup 3 is positioned on a predetermined track via the servo circuit 5 and the feed motor 4.

Reference numeral 7 denotes a host computer. The host computer 7 outputs digital data to be written to the CD-WO 1 and a control command to the system controller 6. Digital data is stored in the buffer memory 8, and data read from the buffer memory 8 is supplied to the formatter 9. The formatter 9 converts the data into write data of the CD-WO1. Write data from the formatter 9 is supplied to the laser drive circuit 10. Laser drive circuit 10
Generates a drive signal for modulating a laser beam according to output data of the formatter 9. This drive signal is supplied to the semiconductor laser of the optical pickup 3,
A recording laser beam is generated from the optical pickup 3.

FIG. 2 shows a truck formed on CD-WO1.
1 schematically shows an example of the lock. CD-WO1
When writing data, the dashed line in FIG.
Without writing to the first track 11 shown
And leave it empty. CD-WO1 has, for example, one track
128 sectors, one sector is 2352Bytes
You. FIG. 3 partially shows an example of the address of the CD-WO1.
Show. The writable area is the absolute time code 0Second0
flameStarts at (0,0). Empty, as described above
The address of the track to be put is, for example, 2Second0flame
Starts at (2,0). The record for CD-WO1 is
You can always go to the first track, as described later.
Judge the flag information corresponding to whether or not the
Alternatively, the first track may be made empty. CD
-On WO1, for tracking control, for example,
When wobbling the groove at a predetermined frequency,
By FM-modulating the wobbling frequency
Thus, the above address information can be recorded. Alternatively,
Address information by embossing
Can be recorded.

Referring to the flowchart of FIG. 4, the recording operation for the CD-WO 1 according to the embodiment will be described. When the recording operation is started, as described above, the CD-W 1
Data is written with a first track (track indicated by a broken line in FIG. 2) including a predetermined address of O1 such as LSN 16 (step 21). Then, in FIG.
After a series of data has been written to a plurality of tracks indicated by No. 2, it is checked in step S22 of determination whether or not a freeze has occurred. Freezing means CD-R
It means that to have the OM and compatibility.

When the freeze is not performed, the process returns to the step 21. When the freeze is performed, the structure information is written to the first track including the LSN 16 (step 23). This structure information is, for example, CD-
ISO96, a logical format for ROM
Which was according to 60 standard, the basic volume descriptor regarding one disc (volume), the secondary volume descriptor, a volume compartment, <br/> volume descriptor set terminator etc. containing Miuru. Structure information is defined to correspond to the set of data to be written, for example, the host computer 7
Can be generated. This structure information is written from the LSN 16 at the predetermined address (2, 16 ) of the first track in order to make it coincide with the recording position in this standard.

When the writing of the structure information to the first track is completed, it is checked in step 24 whether or not to continue the writing. When writing is continued, digital data is written to the area indicated by 13 in FIG. 2 (step 25). If the writing is not continued, the recording ends (step 26).
The additional writing can be performed after the recording operation is completed, and a control that always continues writing until the last track of the CD-WO 1 may be adopted.

In FIG. 2, after writing data to a plurality of tracks, the program returns to the first track 11, writes structure information, and reproduces the CD-WO 1 in which another record data is written in the area 13. The operation will be described. First, according to the original drive of the CD-WO1, all the information can be read. In this case, the structure information of the first track is CD-
Since it is for ROM, it is not necessary for the drive of CD-WO1, but it is necessary to refer to read data processing.
You can also .

When the CD-WO 1 is read by a CD-ROM drive, the structure information from the first track 11 and the read data from a plurality of tracks 12 can be used. That is, since the CD-ROM drive device can obtain the structure information conforming to the standard from the track 11, the plurality of tracks 12
You can know the structure of the data written in. And can use this data appropriately. However, since the structure of the data written on the track added to the area 13 is not known, even if it can be reproduced by the optical pickup 3, it cannot be used as valid data.

In the above-described embodiment, the CD-WO and the CD
-Describes the relationship with ROM, but the invention is not limited to both. What is important is that one is a non-rewritable, recordable optical disk and the other is a disk of another type, such as a read-only optical disk. Therefore, the format of the structure information is not limited to the example described above, and may be any format as long as it is set for an optical disk of another format. Further, the recording position of the structure information is not limited to the innermost track of the disk, but may be the outermost track corresponding to the data writing order.

[0017]

According to the present invention, when data is written to a non-rewritable and recordable optical disc, the recorded data is recorded on a predetermined track by recording the structure information on the read-only optical disc to thereby reduce the recorded data. The data can be read by a drive device of an optical disk for another format. Therefore, a system having only a drive device for another type of optical disk cannot be rewritten,
Data written on a recordable optical disk can be effectively used.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a drive device that can be used for implementing the present invention.

FIG. 2 is a schematic diagram illustrating an outline of a track pattern on a disk.

FIG. 3 is a schematic diagram partially showing an example of a track address;

FIG. 4 is a flowchart for explaining an embodiment of the present invention.

[Explanation of symbols]

 1 CD-WO 3 Optical pickup 11 First track

Claims (1)

(57) [Claims] 1. A method for recording data at a predetermined position on a recordable optical disk that is not rewritable, and sets flag information indicating whether or not to make the data compatible when the recording of the data is completed. When the result of detection and detection of the flag information indicates that the compatibility of the data is provided, the data is recorded in a data recording area, which is located on the inner side of the predetermined position. An optical disc recording method for recording data representing a data structure necessary for providing logical compatibility.