METHOD FOR SECURELY DELIVERING AUDIOVISUAL SEQUENCES, DECODER AND SYSTEM THEREFOR
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United States of America Patent
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Issued Date -
Mar 12, 2009
app pub date -
Mar 1, 2007
filing date -
Mar 10, 2006
priority date (Note) -
Abandoned
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Abstract
A method for delivering a nominal audiovisual stream including nominal coefficients to a receiving site including a secure gateway includes modifying, in the nominal audiovisual stream, at least one nominal coefficient among the nominal coefficients to generate a main digital stream; generating complementary information so that the nominal audiovisual stream is implemented from the complementary information and main digital stream at the receiving site; performing cryptographic operations on the secure gateway with the complementary information; and causing the gateway to transmit the complementary information to an audiovisual processing peripheral to enable the nominal audiovisual stream to be implemented at the audiovisual processing peripheral.
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