Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2011-08-30
2011-08-30
Dinh, Tan X (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275400
Reexamination Certificate
active
08009547
ABSTRACT:
An optical disk includes a first area on which user information is recorded, and a second area in which a plurality of marks radially extending are arranged in a track direction in the optical disk. Information about the reflectance of the optical disk is recorded in the second area. It is intended to optimize the amplification factor of the reproduced signal on the basis of the information about the reflectance of the optical disk in the second area. Control data and user data can be reproduced quickly and highly reliably without depending on the relationship between the reflectances of a recording area and a non-recorded area of the optical disk.
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Shirai Hiroshi
Tamura Reiji
Dinh Tan X
Hitachi Maxell Ltd.
Oliff & Berridg,e PLC
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