Patent ID: 8442225

Claim:
A method for distributing a marked audiovisual sequence from a nominal audiovisual sequence to a receiving item of equipment, the nominal audiovisual sequence having a nominal content, the method comprising: (a) generating, by a first generator, a first modified flow having a modified content different from the nominal content; (b) generating, by a second generator, a second marked complementary flow including marked complementary digital information; and (c) transmitting, by a transmitter, the first modified flow and the marked complementary information to the receiving item of equipment so as to allow a restoration of the marked audiovisual sequence at the receiving item of equipment; wherein generating the second marked complementary flow, further includes: (i) carrying out a marking operation on the nominal audiovisual sequence so as to determine a marked audiovisual sequence having a marked content; and (ii) determining a difference between the marked content on the one hand and the modified content or the nominal content on the other hand; (iii) wherein the marked complementary digital information depends on the difference.