Optical disc with sector address irregularities to prevent copyi

Details Optical disc with sector address irregularities to prevent copyi Optical disc with sector address irregularities to prevent copyi

1997-07-24

1999-07-27

Neyzari, Ali

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 47, 369 58, G11B 1722

Patent

active

059302097

ABSTRACT:
An optical disc and an optical disc recording apparatus have an improved protection against undesired or illegal copying. Information on optical discs is arranged in sectors, which each has an address label. The address value of the address labels increases linearly from the start of the disc or from the start of the program area of the disc. The address labels of specific sectors, which may have an informationless content, are given different, e.g zero, address values, which prevent copying CD-ROM discs on a standard CD-Recorder apparatus. Said address labels may be stored in the main data stream or e.g. the subcode channel of a CD system.

REFERENCES:
patent: 5255007 (1993-10-01), Bakx
patent: 5661703 (1997-08-01), Moribe et al.

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