Robust digital video watermarking in an orthogonal parametric space

This paper presents an event based scheme for uncompressed video watermarking. The video signal is assumed to be a sequence of overlapping visual components - called events. We address this overlapping structure of video contents and present an event based approach through employing a block based Temporal Decomposition (TD) scheme. The TD describes a set of spectral parameters of the video as a linear combination of a set of temporally overlapping compact event functions. We have applied the decomposition results to digital video watermarking. To construct the matrix of parameters in the TD, Multiresolution Singular Value Decomposition (MR-SVD) is utilized and singular values of a set of MR-SVD coefficients are selected as the extracted spatial features of each frame of the video signal, and then the feature matrix is decomposed based on the TD method. The watermark is embedded in the TD target vectors which are the orthogonalized parameters representing the video events. Experimental results show that this scheme is robust against collusion attack, frame swapping, frame dropping, uniform noise attack, median filtering attack, and the MJPEG (Motion JPEG), the MPEG-1, and the MPEG-2 compressions attacks.