METHOD AND SYSTEM FOR THE SECURED DISTRIBUTION OF AUDIOVISUAL DATA BY TRANSACTION MARKING

摘要

The invention relates to a method for distributing a marked video sequence (106) from a nominal video sequence (1), said nominal video sequence having a nominal content, in which a first modified flow (101) having a modified content different from the nominal content is generated, and a second marked complementary flow (103) containing marked complementary digital data is generated. Said first modified flow and said marked complementary information are transmitted so as to enable the reconstruction at the addressee's equipment of said marked audiovisual sequence (106). A marking operation of said nominal audiovisual sequence (1) is carried out in order to determine a marked audiovisual sequence (106, 111) having a marked content. The method further comprises determining a difference between said marked content on the one hand and said modified content or said nominal content on the other hand. All the marked complementary digital information (103) is a function of said difference.