Abstract:

A fast motion estimation algorithm based on adaptive search range is proposed for the H.264/SVC, applied in remote realtime transmission of sample images of electron microscopes and other scientific instruments. The macroblocks at the base layer and enhancement layer are classified according to the spatial and interlayer correlation. For the macroblocks of different types, an adaptive search range algorithm in both horizontal and vertical directions is designed based on macroblock motion vector difference. In addition, early termination algorithms are also designed for matching block searching and interframe prediction respectively. Experimental results for sample videos of different instruments show that, compared with the fast search algorithm of reference software JSVM9.17, the proposed algorithm can reduce the encoding time by 52%-68% and the search points by 81%-95%, with similar PSNR and bit rate.

Key words: information processing technology, sample video, H.264/SVC, motion estimation, search range, early termination