Fast Mode Decision Algorithm for Motion Vector Prediction in H.264
Tao Jin · Jisuanji gongcheng · 2010
The macroblock motion estimation process is a long time consuming part in H.264 standard.Aiming at this problem,a fast mode decision algorithm for motion vector prediction is presented in this paper for decreasing it efficiently.The average of predictive motion vector is computed according to the spatial correlation of video sequence,and the current block as a slow or fast motion block and the direction of motion vector are determined and an appropriate search pattern is selected according to the square mixed pattern.It is decided that whether the motion estimation terminated or not according to a given threshold.Experimental results show that the proposed algorithm can decrease 36.34% of average motion estimation time than the existing EPZS algorithm does with about the same quality of video coding.