System and method of content copy control

Details System and method of content copy control System and method of content copy control

2007-03-06

2007-03-06

Barron, Gilberto (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S193000

Reexamination Certificate

active

09870207

ABSTRACT:
A calculator system for performing duplication of contents does not necessarily perform screening, i.e., electronic watermark detection, rather, contents copy control information can be obtained otherwise. For example, in the event of copying a CD regarding which it is known beforehand that there is no electronic watermark inserted in the contents, the electronic watermark detection processing itself can be skipped as long as the CD can be confirmed to be such, thereby reducing the amount of time necessary for copying. Electronic watermark inspecting processing with heavy computation loads is performed vicariously for judging whether or not duplication of contents is permissible.

REFERENCES:
patent: 6320829 (2001-11-01), Matsumoto et al.
patent: 6571220 (2003-05-01), Ogino et al.
patent: 6633723 (2003-10-01), Kuroda et al.
patent: 6687411 (2004-02-01), Miura et al.
patent: 6707774 (2004-03-01), Kuroda et al.

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