Novel Video Watermarking Algorithm Based on MPEG-7 Contour Description
Jianfu Li · 2010
For the copyright protection of digital video,a novel video watermarking algorithm based on MPEG-7 contour description was proposed.The original video is spitted into a series of frame groups,for each frame in the group,the points of contour shape are described by MPEG-7,and taking advantage of hash function to calculate the Keys between those points in the 1D-DFT transform domain and the watermark signals.Then,decomposes all those contour points of each frame in one group through 2D-DFT transform and obtains the invariant domain of the time axis and the contours,and then embeds the watermark signals into this domain to ensure the watermark reliability and robustness.And in the process of watermark extracting,it is performed multiple watermark verification to keep it accuracy.Experimental results show that the watermarked frames are indistinguishable from the original frames subjectively and the proposed video watermarking algorithm is robust against the attacks of additive Gaussian noise,frame dropping,frame averaging and lossy compression.