说明：  代码利用OBMC（重叠块运动补偿）算法，实现运动补偿。利用前一帧和当前帧的运动向量场，重建出当前帧。
(Code utilization OBMC (overlapped block motion compensation) algorithm, motion compensation. Using the motion vector field of the previous frame and the current frame and the reconstructed current frame.)