Reducing problems caused by variations in watermark...

Details Reducing problems caused by variations in watermark... Reducing problems caused by variations in watermark...

2007-12-04

2007-12-04

Zia, Syed A. (Department: 2131)

Cryptography

Video cryptography

Copy protection or prevention

C380S201000, C380S202000, C380S239000, C380S241000, C713S176000, C713S177000, C713S178000, C713S179000, C726S032000, C726S033000, C382S100000, C382S232000

Reexamination Certificate

active

10655710

ABSTRACT:
Detection of watermarks in digital content by a system having a recording device and a playback device may be accomplished in such as a way as to improve the interoperability of the recording and playback devices. In one embodiment, a recording device having a first watermark detection component of a first sensitivity for detecting the watermark in digital content, interoperates with a playback device having a second watermark detection component of a second sensitivity for detecting the watermark in a digital content recording made by the recording device; such that the first sensitivity is more sensitive than the second sensitivity.

REFERENCES:
patent: 2003/0103645 (2003-06-01), Levy et al.
patent: 2005/0053238 (2005-03-01), Ripley

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