Fragile watermarking algorithm for the integrity authentication of video bit-stream of H.264/AVC
H.264/AVC视频流完整性认证的脆弱水印算法

An integrity authentication scheme for video bit-stream based on the fragile watermarking is proposed in this paper. In the compressed bit-stream of H.264, The authentication codeword are generated according to the mode of intra_4×4 in I_Slice firstly, and then embedded into B_Slice and P_Slice by modulating some VLC codeword of sub-block. This modulation is based on the mapping rule between the VLC codeword and the bit to be embedded. The mapped codeword is very similar to the original codeword, namely, the length of codeword is same and the value of coding element is similar. This scheme could detect the watermarking rapidly, which meets the requirement of the real-time processing of video. Experimental results show that it has less influence on the quality of video, and can effectively carry out the integral certification of video frame.