Patent ID: 8374348

Claim:
A method of distributing video sequences in a coded stream including a succession of images each comprising at least one Intra-frame coded image (I picture) and at least one Prediction coded image corresponding to differences between at least two images of the succession of images comprising: analyzing an original coded stream prior to transmission to an input/output device of a client and generating, based upon the analysis, a first modified stream and a second stream, wherein said first modified stream includes a modified Prediction coded image, said modified Prediction coded image being a randomly generated image or the result of swapping two Prediction coded images, so that the modification from said at least one Prediction coded image results in a visually altered video sequence, and an I picture, which is not modified, said first modified stream maintaining a form for an encoding system applied to said original coded stream after said modification, and said second stream including digital information that allows a reconstruction from said modified Prediction coded image to said original coded stream; separately transmitting the two generated streams from a server to a destination device; and synthesizing said first modified stream and said second stream at the destination device to reconstruct said original coded stream.