A Compressed-domain Video Watermarking Algorithm Robust to Self-collusion Attack for H.264/AVC
Gaobo Yang · Computing Technology and Automation · 2008
A compressed-domain video watermarking algorithm robust to self-collusion attack is proposed by utilizing the new characteristics of H.264/AVC.It is an improvement of Noorkami's algorithm.The security of watermarking is based on the random position of watermark,which is decided by the key obtained from the related change of DC coefficients.Watermark is embedded by changing the non-zero coefficients of the 4×4 block within a marcroblock.Experimental results demonstrate that the proposed approach can enlarge the watermark capacity without sacrifice of video quality.Moreover,the watermark detection does not need fully decoding the video stream,and can meet the requirement of blind detection with real time performance.