In this paper

a region segmentation based multiresolution motion compensation wavelet video coding algorithm is proposed. The features of the kernel parts of this coder are as follows: 1)In the part of motion estimation

based on the basic variable block multiresolution motion estimation algorithm

we take full advantage of the spatial and orientation correlations between the motion structures represented by the wavelet decomposition subbands and improve the coding efficiency of the motion vectors; a region segmentation based multiresolution motion estimation algorithm is presented

under this algorithm

the computation complexity of motion estimation is reduced and the motion vector coding efficiency is improved farther. 2) In the part of quantization

a quantization scheme based on human vision system is proposed. 3) An improved version of zerotree wavelet coding algorithm with high performance is adopted to code the intraframe and interframes. The experimental results prove the effectiveness of the algorithm this paper presented.