Optical disk, method of playing optical disk, and optical...

Details Optical disk, method of playing optical disk, and optical... Optical disk, method of playing optical disk, and optical...

2007-06-26

2007-06-26

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S053210, C369S053220, C369S059170

Reexamination Certificate

active

10760585

ABSTRACT:
An optical disk includes a recording region formed on a substrate for recording user data, and a management region formed on the substrate which includes an identification information region for recording disk-specific identification information such as address information (ID), a SYNC code, or an error detection code (EDC). The identification information region in this optical disk has a flat portion (a mirror region) formed by means of sectioning part of a groove or a land in a given step. The disk-specific identification information is recorded on the identification information region inclusive of this mirror region as irreversible record marks. Moreover, a signal of the disk-specific identification information is detected by a laser beam which is servoed on the recording track of this optical disk. Then, a change in the detected signal level of the disk-specific identification information is detected based on a predetermined threshold level.

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