Fast Motion Estimation Combined with Rate Control in H.264
YU Zhan-wu · Jisuanji gongcheng · 2008
Motion estimation is a most times-consuming module in H.264 encoder.Early terminating motion search is a best method for improving motion estimation.In H.264 encoder,rate control computes the predicted SAD which can be used as a decision condition for terminating motion search.It can be proved that image quality has no changes if the difference between predicted SAD and best SAD is small.Experimental results show the proposed early terminating motion search can effectively improve motion estimation speed and keep good image quality.