Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2005-08-02
2005-08-02
Darrow, Justin T. (Department: 2132)
Cryptography
Video cryptography
Video electric signal modification
C380S215000, C380S216000, C348S587000, C348S612000, C348S642000
Reexamination Certificate
active
06925181
ABSTRACT:
A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to generate a sequence of pseudo-random values for the color component; and an adder coupled to the offset generator and to the color component signal for providing an encoded color component signal. The system also includes a decryptor with a decryptor offset generator adapted to receive the encrypted frame key and to generate a decryptor pseudo-random value for the color component; and a subtractor coupled to the offset generator and to the color component signal for subtracting the offset signal from the color component signal.
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U.S. Appl. No. 09/192,102,—relied on for an earlier filing date under 35 U.S.C. 120.
Barr David A.
Kohn Leslie
Le Gall Didier
Christopher P. Maiorana P.C.
Darrow Justin T.
LSI Logic Corporation
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