Digital Video Watermarking in AVS Compressed Stream for Copy Control
Yuting Su · Journal of Tianjin University Science and Technology · 2008
To achieve content authentication and copyright protection by noticing the serious problem of copyright piracy,a novel watermarking algorithm based on Exp-Golomb code modulation of audio video coding standard(AVS)was proposed.In the bit stream of AVS video compression standard,watermarking was implemented by modu-lating the corresponding Exp-Golomb code,which is based on the mapping rules between these codes and the infor-mation bits.The embedding positions were limited to enhance the quality of the reconstructed images.The extraction of information needs no original media,and merely requires decoding the Exp-Golomb code from bit stream rather than decoding the whole video.The experimental results show that the presented watermarking method achieves com-paratively high embedding rate without increasing the bitrate of data,and has almost no impact on video quality sub-jectively as well as objectively.The method introduces no complicated computation,and therefore the implementation is fast.Such properties make the presented method effective,and hence make it a way to copy control of the video data.