Method and device for distributing secure digital audiovisual contents by interoperable solutions
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United States of America Patent
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Dec 2, 2014
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N/A
app pub date -
Mar 12, 2007
filing date -
Mar 13, 2006
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Abstract
A method for distributing a nominal audiovisual stream to a recipient device including modifying, in the nominal audiovisual stream, at least one nominal coefficient among the nominal coefficients to generate a modified main stream; generating complementary information such that the nominal audiovisual stream may be implemented based from the complementary information and on the modified main stream, applying a plurality of methods for protecting the complementary information to generate multiple protected complementary information, each of the protected complementary information enabling the nominal stream of the main stream to be implemented upon application of an access method compatible with the protection method which has been used to protect it; and transmitting to the recipient device the modified main stream and the multiple protected complementary information.
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