A novel semi-fragile blind watermark algorithm based on H.264 low bit-rate video stream was proposed in this paper

copyright protection and content authentication can be achieved jointly by embedding the robust watermark and fragile watermark spectively during the process of interior prediction and motion vector prediction which are characteristic for H.264 standard.Through introducing the quantization factor of H.264 in the embedding and prediction mode choice

the proposed scheme can strengthen the watermarking resistance to video recoding and strike a good rate-distortion balance for the watermark of lower bit-rate video stream

which relieve bit-rates lossness from the watermarking embedding.Experimental results also demonstrate that this scheme is very computational efficient during watermarking embedding and extraction.