Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2006-06-13
2006-06-13
Vu, Kim (Department: 2135)
Cryptography
Video cryptography
Copy protection or prevention
C380S200000, C380S201000, C380S210000, C380S216000, C713S189000, C713S193000
Reexamination Certificate
active
07062047
ABSTRACT:
A video signal reproduction system for receiving a video signal transmitted via a satellite communication link at a receiving device. A copy permission indicator is inserted in the received video signal. The copy permission indicator is generated on the basis of copy management information that has been appended to the video signal and detected by the system. The indicator is in the form of a multiple of coded bits which are arrayed at a pre-set position in the video signal and are operable to indicate a generation limitation on copying of the video signal.
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Sako Yoichiro
Yoneyama Shigeyuki
Dada Beemnet
Frommer William S.
Frommer & Lawrence & Haug LLP
Simon Darren M.
Sony Corporation
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