Device to protect the transmission, recording and display of audiovisual programs.

摘要

Method for the distribution of video sequences from a server (12) to a destination computer (8), the video sequences having a format nominal flow (101) constituted by a succession of frames each comprising a complete image I or a differential image of B type or P, the method including steps in which: before transmission to the receiving equipment (8), - analyzing (121) said nominal flow to generate a first modified stream; - a second stream of any format, comprising digital information are suitable to allow reconstruction of said nominal stream from said first modified stream is generated; then - is transmitted separately the two flows thus generated from the server (12) to the receiving equipment (8); - calculating (87) in the receiving equipment (8) a synthesis of a stream in nominal format depending on said first flow and said second flow, the method being characterized in that: - said first modified stream has the same format as said nominal stream and includes at least one differential digital image of the B or P type modified with respect to said nominal stream.