New Watermarking Algorithm with Coding Efficiency Improvement and Authentication in Video Surveillance

This paper proposes a fragile watermarking algorithm named compression watermarking algorithm (CWA) which provides compression and authentication functions to apply in MJPEG of video surveillance system. The watermark information is embedded into every 8 times 8 block in the coefficient domain in encoding process and extracted watermark from each 8 times 8 block in the coefficient domain in decoding process. Simulation results show that the PSNR of embedded video is lower than non-embedded video, however, the loss of quality is hardly discernible. Furthermore, the results show that the scheme improves the coding efficiency and therefore reduces both the transmission time and the storage capacity.