%0 Journal Article
%T Fractional Pixel Motion Estimation based on Prediction of Flat Regions for H.264<br>针对H264的基于平坦区域预测的分像素运动估计
%A FANG Jian
%A <br>方健
%A 郑伟
%A 李炳博
%A 王匡
%J 中国图象图形学报
%D 2008
%I 
%X Motion estimation(ME) consumes most of the computational resource in a video encoder system.H.264 adopts multi-mode ME and quarter-pel accuracy fractional pixel search,which brings about large scale of computational cost not only to integer pixel ME but also to fractional pixel ME.However,the computational cost of integer pixel ME has been greatly reduced with the development of fast integer search algorithms.Therefore,fast fractional pixel ME algorithms become significantly important for real-time applications.A novel fractional pixel motion estimation based on prediction of flat regions of an image is first proposed in this paper.It reduces fractional pel search points efficiently by predicting flat homogeneous regions of the image.Experimental results show that compared to the full fractional pixel search,the proposed method can reduce 22% to 63% of fractional pixel search points while keeping the image quality and compression rate almost unchanged.
%K H
%K 264
%K fractional pixel search
%K multi-mode motion estimation
%K flat region<br>H.264
%K 分像素搜索
%K 多模式运动估计
%K 平坦区域
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=D06194629680C940ACE75262F54B9D85&aid=E76773F8D5CFED28E61F98564F9FD7B7&yid=67289AFF6305E306&vid=FC0714F8D2EB605D&iid=59906B3B2830C2C5&sid=801EBB10B04CA7DA&eid=6400C497FC137EE5&journal_id=1006-8961&journal_name=中国图象图形学报&referenced_num=1&reference_num=9