Watermarking Video , Hierarchical Embedding in Motion Vectors ( TP − L 3 ) Author ( s ) :
This paper proposes a new method for video watermarking uses a hierarchical analysis of motion. This model is robust against classical video processing (filtering, lossy compression...). Moreover it uses the main specific features of a video, the motion. We generate a hierarchy of motion vectors to spread the mark on the lower level and then obtained a robust scheme of watermarking in the uncompressed domain. This aspect denotes an interesting point that actually does not appear in the existing algorithms. In our approach, we compute motion vectors by a BMA (Block Matching Algorithm) on blocks of size nN*nN, in order to increase the robustness of our approach a hierarchy of n levels of motion vectors is generated to spread the mark on the lower level (n=1).