Patent ID: 8695029

Claim:
A method of distributing digital video sequences in the form of a stream comprising sequences of data containing digital images, comprising: producing a scrambled modified stream altered from the point of view of human visual perception from the original stream by replacing at least a part of coefficients of the sequences of the original stream by values different from original values, the original stream being in a nominal compressed format other than encrypted, said modified stream being of the same nominal compressed format as the original stream, producing complementary information having a granular scalability structure allowing reconstruction of the original stream by a decoder and comprising the original replaced coefficient and a corresponding location in the original stream and at least one function containing at least one instruction, wherein the complementary information describes an operation to be performed to reconstruct the original stream from the modified stream and the original replaced coefficient in the complementary information, transmitting the modified stream to a recipient, transmitting a subset of the complementary information to the recipient, the subset being determined based on a digital profile of the recipient and is adaptive and progressive in function of the digital profile provided, and reconstructing at a recipient side of the video sequences from the modified stream and the complementary information by replacing the modified coefficients from the modified stream by values contained in the complementary information at locations indicated by the complementary information.