基于H.264的快速模式选择算法

Fast Mode Decision Algorithm Based on H.264

基于H.264的快速模式选择算法,通过计算连续2帧的绝对误差和2帧中相同位置宏块的绝对误差,得出提前判断出具有16×16模式宏块的快速算法。即采用全模式搜索法进行运动估计,并采用宏块正确率与错误率的差来衡量连续2帧绝对误差的修正参数的优劣性。该算法可减小树状结构运动估计的计算量。

A fast mode decision scheme is proposed to decide mode 16× 16 in advance by the absolute frame difference （MAFD） of the current frame and mean absolute difference （MAD） of the current MB. The amendator, parameter is decided by the difference of the right rate and the error rate. Simulation result shows that we can achieve groat complexity reduction while maintaining the bit rate and the PSNR.