运动矢量加模式选择 （英文）

Abstract—In this paper, a video watermarking technique is proposed to hide copyright information in H.264 motion vectors. In this method, watermark is embedded in the motion vectors, and the region of motion vector is restricted to hide watermarking information. In order to obtain the good watermarked video quality, intra mode can be used to encode those macroblocks badly affected by restricting the region of the chosen motion vectors in inter mode. The watermark can be easily retrieved by the encoding mode of the macroblocks or the region of its motion vectors. The experimental results demonstrate that the video quality is almost the same as that of the original. The increase of bit rate is less than 1%. The proposed method keeps the excellences of hiding watermark by using the region of motion vectors. The capacity of watermark can be increased by choosing more macroblocks to the watermarks.