The Video Watermark Algorithm Based on Rate Distortion Theory

A novel watermarking algorithm based on rate-distortion theory was proposed. Firstly, every two adjacent blocks in coding sequence were divided into one group. The next step was to separately modify the motion vector of member macroblock and compute the change of rate distortion. Then the macroblock with smaller change of rate distortion was chosen as the candidate macroblock. The third was to seslect the candidate macroblock from previous and change the motion vector component of macroblock in order to embed the watermark. Experimental results show that the proposed scheme was robust to frames deletion.