Wavelet Transform Based Variable Tree Size Fractal Video Coding
A new wavelet video compression scheme using adaptive fractal coding is presented in this paper. Through pyramidal wavelet transform, each video frame is decomposed into multiresolution subbands and then organized into a set of wavelet subtrees to represent motion activities. After multiresolution motion detection, these wavelet subtrees are class8ed into motion and non-motion subtress. The coding of non-motion subtrees is straighqoward and simple, while the motion subtress are adaptively separated and then encoded using variable tree size fractal coding. Experimental results show that the proposed scheme provides a superior pegormance in terms of PSNR as well as the subjective quality at low bit-rates.