H264 is a new video compression standard with high compression rate

high video quality and high complexity. Because of the high compression rate

some normal watermarking scheme cant be used in H264 directly. In this paper

a video watermarking scheme base on the region character of motion vectors is proposed. Moreover

computational complexity is reduced by 50%. From the experimental result

after embedded the watermark

there is no difference between the original image and that of embedded watermark. The fluctuation of PSNR is controlled within ±01 and the increase of bit rate is controlled within 1%. In motion estimation

Search points are half of the original one. So this scheme is an easy and high efficient method to embed watermark. And the capacity of watermark can be doubled by judging four regions.