Watermark Algorithm of Low Bit-rate Video Rubost to H.264 Compression
Meihua Wang · Jisuanji gongcheng · 2008
In order to solve the problem of copyright protection for H.264 compressed video, a novel watermark algorithm of low bit-rate video is proposed. According to the distribution of DCT coefficients in H.264, by using the sign coding of the coefficients, watermark is embedded into the quantized DCT coefficients of the intra frame. For the sake of reducing the video distortion in watermarking, a quantized distortion compensation method is used. By using the mechanism of sign correlation detection, the original video is not needed in detection process which means the algorithm is blind. Experiment results show that the new algorithm can keep small distortion to video and well survive the H.264 compression attack.