Ma Shexiang，Liu Guizhong,Shang Zhaowei
(School of Electronics and Information Engineering,Xi'an Jiaotong University,Xi'an 710049, China)
Abstract：In order to reduce the complexity of the optimal segmentation in variable size block matching motion estimation and compensation, variable size bi-directional motion compensation inter-frame coding scheme is introduced. Bi-directional compensates one frame for every two inter-frames. For this frame, back block matching motion estimation and compensation is performed firstly, then the forward block matching motion estimation and compensation is achieved in the smaller blocks. The overlapped region of the compensation is computed by average. Simulation results show that the reduced peak signal-to-noise ratio is below 0.1dB when time complexity of the segmentation is reduced about half the previous method. It is shown that the scheme is effective.
Keywords：video coding;quadtree segmentation;bi-directional motion compensation