Bi-watermarking algorithm for H.264/AVC low bit-rate video stream
基于H.264/AVC低比特率视频流的双水印算法

Noticing the new features of the H. 264/AVC video coding standard, through the research into the coding of the DCT coefficients of I-frames and the processing of the motion estimate of P-frames, a new bi-watermarking algorithm that can realize the copyright protection and the integrality authentication jointly was proposed. Simulation results show that the video stream has a good rate-dlstortion balance by using the coding control technique of Lagrangian optimization; the robust watermark embedded has good immunity to some attacks such as requantization, frames-editing and so on, and the fragile watermark embedded is very sensitive to various common attacks. This algorithm need not decode to the video bit stream entirely, and it realizes the blind detection of bi-watermarking, which can achieve the requirement of the random detection in real-time.