Abstract:

In current motion estimation algorithms, the split block selection and threshold cause search redundancy. In response to this phenomenon, a fast motion estimation algorithm with adaptive select the coding mode is proposed. Regarding the threshold selection, an adaptive threshold selection method is proposed to improve the search accuracy of the algorithm. In module selection, spatial correlation and motion characteristics of the video image are combined to find the best module, and several search templates are used to search the segmented block, thus reducing the computational complexity of the motion estimation module. Experimental results show that this algorithm can reduce the computation time by 97% while having the reconstructed image quality close to the full search algorithm.      

Key words: motion estimation algorithm;threshold;H.264;spatial correlation;motion characteristics