Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2005-10-25
2005-10-25
Dildine, R. Stephen (Department: 2133)
Cryptography
Video cryptography
Copy protection or prevention
C380S228000, C380S255000
Reexamination Certificate
active
06959087
ABSTRACT:
An information signal is transmitted. The information signal contains 1) encryption-resultant information, 2) an error correction code signal, and 3) decrypting information. The error correction code signal is designed for correction of at least one error in the encryption-resultant information. The error correction code signal is repetitively completed at a completion period. The decrypting information is designed for decryption of the encryption-resultant information. The decrypting information is repetitively completed piece by piece. At least one compete piece of the decrypting information is dispersively placed in a portion of the information signal which corresponds to the completion period of the error correction code signal.
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Dildine R. Stephen
Victor Company of Japan Ltd.
Woo Louis
LandOfFree
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