DISK-SHAPED RECORDING MEDIUM AND RECORDING/REPRODUCING DEVICE FOR DISK-SHAPED RECORDING MEDIUM

• US 20140098654A1
• Filed: 06/10/2011
• Published: 04/10/2014
• Est. Priority Date: 06/10/2011
• Status: Active Grant

• Current Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Inventors: Hoshizawa, Taku
• Granted Patent: US 8,976,639 B2
• Time in Patent Office: Days
• US Class Current: 369/30.03
• CPC Class Codes: G11B 19/122 involving the detection of an identification or authentication mark record carriers indicating unauthorised or prior use G11B23/28
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 2020/122 Burst cutting area [BCA]
• CPC Class Codes: G11B 2020/1287 Synchronisation pattern, e.g. VCO fields
• CPC Class Codes: G11B 2020/1292 Enhancement of the total storage capacity
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/232 Double-sided discs, i.e. two recording layers accessed from opposite sides
• CPC Class Codes: G11B 2220/235 Multilayer discs, i.e. multiple recording layers accessed from the same side
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 7/00736 Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082
• CPC Class Codes: G11B 7/24038 Multiple laminated recording layers

Abstract

When recording layers were provided on both the front and back sides of an optical disk in order to increase the recording capacity, whether the reproducing surface of the optical disk taken out of the cartridge was the front side or the back side could not be determined. This problem can be solved by adding to the BCA, in addition to disk identification information: type information indicating whether a recording surface is provided on one side or both sides; side information indicating whether the surface with which reproduction is being performed is side A or side B; recording layer quantity information indicating whether the disk has a single layer or a double layer; information indicating the areas other than the BCA and the directions in which data on the read-in, data zones, and read-out are recorded/reproduced; and information indicating the presence/absence of a disk cartridge.

Claims

1. An optical disc having recording surfaces on its both surfaces, comprising:

a BCA in which information about the optical disc is recorded; and

a lead-in area which is located on a peripheral side of the BCA and in which information about the optical disc is recorded;

wherein the BCA is divided into a plurality of blocks;

wherein a first one of the plurality of blocks has information recorded therein, the information indicating at least disc type, recording characteristics, a version number of a standard with which the disc is compliant, and whether the disc is double-sided or not;

wherein a second one of the plurality of blocks has at least optical disc intrinsic information used for copy management and a manufacturer identification code recorded therein; and

wherein the disc type, recording characteristics, and a version number of the standard with which the disc is compliant are recorded in the lead-in area.

2. The optical disc set forth in claim 1, wherein the first block contains information for identifying the recording surfaces.

3. The optical disc set forth in claim 1, wherein the first block contains information indicating the presence or absence of a disc cartridge.

4. The optical disc set forth in claim 2, wherein the first block contains information for identifying a direction in which the disc is rotated to reproduce data zones on the recording surfaces.

5. The optical disc set forth in claim 1, wherein the BCA is recorded on both surfaces.

6. The optical disc set forth in claim 1, wherein information indicating whether or not the disc is a double-sided disc is also recorded in the lead-in area.

7. An optical disc recording/reproducing device in which data areas on both surfaces are used as one logical volume in a case when BCA codes of the optical disc on the front and rear surfaces contain disc identification information, information indicating that the disc is a double-sided disc, and information for identifying surface directions.

8. An optical disc recording/reproducing device

wherein, in a case where BCA codes of the optical disc in one surface or both front and rear surfaces contains information indicating the presence or absence of a disc cartridge, the information indicating the presence or absence of a disc cartridge indicates the presence of the disc cartridge;

and when the loaded optical disc is not protected by a disc cartridge, no data recording is made on the optical disc.

9. An optical disc recording/reproducing device

wherein, in a case where BCA codes of the optical disc in both front and rear surfaces contain information for identifying directions of the surfaces, a direction in which the disc is rotated is determined based on the information about the directions of the surfaces.

10. An optical disc recording/reproducing device

wherein, in a case where BCA codes of the optical disc in both front and rear surfaces contain information for identifying the direction of rotation of the disc for reproduction of a data zone, a direction in which the disc is rotated is determined based on the information about the direction of rotation of the disc.

11. A method of recording information on an optical disc, the optical disc having recording surfaces on its both surfaces, the optical disc having a BCA in which information about the optical disc is recorded and a lead-in area located on a peripheral side of the BCA and having information about the optical disc recorded therein, the BCA being divided into a plurality of blocks, the method comprising the steps of:

recording information indicating at least disc type, recording characteristics, a version number of a standard with which the disc is compliant, and whether the disc is double-sided in a first one of the plurality of blocks;

recording at least optical disc intrinsic information used for copy management and a manufacturer identification code in a second one of the plurality of blocks; and

recording the disc type, recording characteristics, and a version number of the standard with which the disc is compliant in the lead-in area.

12. A method of reproducing information from an optical disc, the optical disc having recording surfaces on its both surfaces, the optical disc having a BCA in which information about the optical disc is recorded and a lead-in area located on a peripheral side of the BCA and having information about the optical disc recorded therein, the BCA being divided into a plurality of blocks;

wherein information indicating at least disc type, recording characteristics, a version number of a standard with which the disc is compliant, and whether the disc is double-sided is recorded in a first one of the plurality of blocks;

wherein at least optical disc intrinsic information used for copy management and a manufacturer identification code are recorded in a second one of the plurality of blocks;

wherein the disc type, recording characteristics, and a version number of the standard with which the disc is compliant are recorded in the lead-in area; and

wherein information is reproduced from the BCA and lead-in area of the optical disc.