The method, system and the data carrier for the production of video water characters, a method and system for the extraction of these watermark

摘要

This method of watermark comprises the following steps: - application (22) of a function of watermark to the motion vectors calculated by the estimation of movement between the images of a video signal (s); - generation (30) of the video signal by the watermarked motion compensation with the aid of the motion vectors tattooed (28) for the application of the function of watermark: - the coordinates of the motion vector selected (v) in a space, certain parts of this space forming a first zone (z0), and the other parts of this space forming a second zone (z1) that is complementary to the first; - a binary value is assigned to each of the two zones; - is modified if desired, the coordinates of the motion vector selected, so that it is located in the zone in which the binary value corresponds to a bit of a key of the marking associated with the motion vector selected.