Research On Video Watermarking Algorithm Using H.264 CODEC

As more and more comsumer digital video products shipped, such as DVD,VCD, the Digital property right technical mainly made up with Digital Watermarking is becoming much more popular by market. Recently Digital Watermarking has been developed rapidly, whereas it focus is almost on Image Digital Watermarking. On Video field, Video Watermarking has fallen behind because of its special features such as much data redundancy,movement field,still field coexistence and imperfect T-HVS(Time Domain Human Visual System). However, just thanks to this immaturity of Video Watermarking, the study of Video Watermarking have more chances and challenges than ever before. As an important branch of digital property right protection, Video Watermarking has been more popular than before too.After discussing the principle and key technology of H.264 CODEC combining with disorder and SPSP(Spread Spectrum), this paper propose an algorithm based on block classification. The algorithm carry out pre-process on the watermark information consist of disorder and SPSP, that mak the watermark information more safer and robust; Mainwhile, On making great use of the features of H.264 CODEC, the algorithm combine classifing video field with AC coefficients of inter DCT and movement vector, which classify the video field from Y,Cb and Cr respectively. These will increase the capacity of embedded information and make the embedded field and intensity adaptive to video field respondingly. The algorithm gets a balance between nonvisibility and robustness. After all, completing the embed progress by additive to DC coefficient of inter DCT.In the end, this paper implements emulation according to this algorithm principle and propose the emulation figure and table. According to the result of emulation, the algorithm has a proper nonvisibility, meanwhile it also can resist recofdification attack,OoOFR attack and frame-deletion attack to some extent.