In this paper

a direction-based adaptive mix-pattern motion estimation search algorithm is proposed. The algorithm makes the best of spatial and temporal correlation

which improves the veracity of the search center prediction compared with the algorithms employing spatial correlation only. By employing adaptive threshold technology on static block determination

the disadvantage of const threshold technology on static block determination has been avoided. Moreover

the algorithm chooses the search strategy according to the corresponding motion type

which can balance the video quality and speed simultaneously. Experimental results show that the proposed algorithm can highly reduce the time of motion estimation ensuring the video quality compared with the UMHexagonS algorithm.