Study and Optimization of EPZS Algorithm
Qingli Liu · Information Security and Communications Privacy · 2010
The core of motion estimation algorithm EPZS recommended by the H.264 video coding standard is analyzed indepth. For its deficient real-time performance in motion estimation,the algorithm is optimized in two aspects,that is, optimization of the dynamic identification for the reference starting position of search window and optimization of the conditions for early termination,and the experiment on different types of sequences with different characteristics of movement is done. The experimental results show that the optimized EPZS algorithm(AP123)could efficiently locate the position of reference search window,and the improvement of the conditions for early termination in the search process could significantly reduce the number of search points and achieves fairly good matching results.