A Motion Estimation Algorithm Based on Vector Prediction and Multi-Direction Gradient Descent Search
Can Hao · Computer Era · 2010
On the basis of fully considering the motion characteristics of various video series, a motion estimation algorithm based on vector prediction and multi-direction gradient descent search is proposed. First the algorithm utilizes the temporal and spatial correlations of the motion vectors to obtain the search starting point of a predictive vector, then it determines the motion type of the current block by using adaptive thresholds, so as to select the different search strategy intelligently. The experiment results show that the algorithm can save more encoding time than the traditional FS, UMHexagonS, simplified UMHS and EPZS algorithms with the same accuracy.