Copy protection system for optical discs

Details Copy protection system for optical discs Copy protection system for optical discs

2007-03-27

2007-03-27

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S047120, C369S059240, C369S047210

Reexamination Certificate

active

10511618

ABSTRACT:
A system for copy protection of record carriers for digital data is described according to which at least one predetermined repetitive bit pattern which encodes into channel bits having an accumulated digital sum value that exceeds a first predetermined limit and that is below a second predetermined limit is determined and recorded onto said record carrier by a mastering process so that said accumulated digital sum value which exceeds said first predetermined limit and is below said second predetermined limit is achieved in said at least one replaced and/or inserted part.

REFERENCES:
patent: 5699434 (1997-12-01), Hogan
patent: 7030788 (2006-04-01), Aida et al.
patent: 2001/0038578 (2001-11-01), Oshima
patent: 2002/0076046 (2002-06-01), Heylen
patent: 2002/0110071 (2002-08-01), Oki et al.

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