Research on improved motion estimation algorithm and its performance comparison experiment based on H.264
Lifen Jiang · China Measurement & Test · 2015
To improve video compression efficiency, this paper, based on traditional search algorithms and the motion vector that is chiefly moving in the horizontal direction in actual motion images, has put forward an improved search algorithm, which is a combination of partial to horizontal cross template searching and biased double-diamond template searching. In accordance with the feature of the motion vector, the number of searching spots can be reduced so as to increase the video compression efficiency and shorten the motion estimation time. The performance contrast experiment shows that this improved algorithm suits all types of motional video sequences,especially those changing drastically in movement. Under the condition that the value of PSNR and code rate is very close to FS algorithm,it can decrease around 95% of the motion estimation time(MET) of QCIF pictures and about 94.5% of the MET of CIF pictures respectively compared to the FS algorithm.