Wavelet Based Video Coding Using Image Warping and Overlapped Block Motion Compensation

This paper describes a video coding algorithm that combines new ideas in motion estimation wavelet l ter design and wavelet based coding techniques A mo tion compensation technique using image warping and over lapped block motion compensation OBMC is employed to reduce temporal redundancies in a given image sequence This combined motion model has the advantage of repre senting more complex motion than simple block matching schemes To further improve the quality of the temporal prediction an adaptive high quality texture interpolation is used Spatial decorrelation of the motion compensated residual images is performed using an one parametric fam ily of biorthogonal IIR wavelet lters coupled with a highly e cient pre coding scheme Experimental results demon strate substantial improvements in objective quality of dB PSNR compared to the H standard Especially at very low bit rates where the reconstruction quality of block based coders su ers from visually annoying blocking artifacts the proposed coding scheme produces a superior subjective quality