A robust video watermarking algorithm based on sliding window for AVS

Based on sliding window technology a robust video watermarking algorithm was proposed in this paper. The watermarks are designed to be encoded in AVS video streaming and be decoded or detected without the original video clips. That is the proposed algorithm is a blind video watermarking for AVS. In order to minimize the loss of video quanlity, the proposed scheme only embeds the watermarks in the low-frequency part of the DCT coefficients in chroma blocks without luminance blocks. Experimental results show that watermarked video clips is only about 0.05db video quanlity degradation using the proposed techniques, compared with of the original video clips. Further more, the design of sliding window allows the user to change the robust of the algorithm to adapt to different applications by modify the secret key.