Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2005-08-09
2005-08-09
Sheikh, Ayaz (Department: 2131)
Cryptography
Video cryptography
Copy protection or prevention
C380S203000, C380S210000, C380S212000, C380S217000, C713S150000, C713S165000, C713S176000, C713S152000, C705S057000
Reexamination Certificate
active
06928165
ABSTRACT:
A digital video communication system includes, at a source site, an embedding circuit for embedding a digital watermark in a digital video stream to produce a watermarked digital video stream, and a multiplexer for multiplexing a text data stream with the watermarked digital video stream to produce a multiplexed signal. At a sink site, the system includes a demultiplexer for demultiplexing the multiplexed signal for recovering a watermarked digital video stream and a text data stream. A digital watermark detector is provided for detecting the digital watermark embedded in the recovered digital video stream. A synchronizer responds to the detected digital watermark for synchronizing the recovered text data stream to the recovered video stream.
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Dickstein Shapiro Morin & Oshinsky LLP.
Moorthy Aravind K
Sheikh Ayaz
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