Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2005-02-01
2005-02-01
Barron, Gilberto (Department: 2132)
Cryptography
Video cryptography
Copy protection or prevention
C380S201000, C713S176000, C382S100000
Reexamination Certificate
active
06850619
ABSTRACT:
Additional information for copyright protection is added to a video signal (first information signal) and an audio signal (second information signal), which are associated with each other and are independently usable, in a video watermark information superimposition unit and an audio watermark information superimposition unit, respectively. The video signal and the audio signal having the additional information added are then output. In a receiving apparatus for receiving the video signal and the audio signal, copyright protection is performed on at least one of the video signal and the audio signal based on both the additional information added to the video signal and the additional information added to the audio signal.
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Barron Gilberto
Dinh Minh
Maioli Jay H.
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