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论文类型：期刊论文

发表时间：2010-10-01

发表刊物：ICIC Express Letters

收录刊物：EI、Scopus

卷号：4

期号：5

页面范围：1585-1590

ISSN号：1881803X

摘要：Motion estimation (ME) is the most important part of H.264/AVC encoder. In order to achieve higher compression efficiency, H.264/AVC encoder adopts multiple prediction modes, multiple reference pictures and high precision of motion vector resolutions which make the motion estimation take up 60% encoding time. An efficient motion estimation algorithm by using a new searching strategy is proposed in this paper. Our experimental results show that, by aid of the new searching strategy, the improved UMHexagonS algorithm can save about 16% ME time on the tested video sequences. In particular, for video sequences with acute motion, the improved UMHexagonS algorithm can save up to 24.2% ME time without loss in image quality and sacrifice in bit-rate. ICIC International ? 2010 ISSN.