Wavelet Transform Based Variable Tree Size Fractal Video Coding
Ying Zhang, Ying-Lin Yu, Lai-Man Po · 2005
A new wavelet video compression scheme using adaptive fractal codi ng i s pr esented i n t his paper. Through pyramidal w avelet t ransform, each vi deo f rame i s decomposed into multiresolution subbands and then organized into a set of wavelet subtrees to represent motion activities. After mu ltiresolution mo tion d etection, th ese wavelet subtrees are classified into motion and non-motion subtress. The codi ng of non-mot ion s ubtrees i s straightforward and s imple, while the motion subtress are adaptively separated and then encoded us ing variable tree size fractal coding. Experimental r esults s how t hat t he proposed scheme provides a superior performance in terms of PSNR as well as the subjective quality at ¦ low bit-rates. I.