Title: A Fast Algorithm of 1/4-pel Accuracy Motion Estimati on Basedon SAD Composite Vector
Abstract: As a new video coding standard,H.264 has an enhanced motion estimation method based on block matching that each partition in an inter-coded macroblock is predicted from an area of the same size in a reference picture,the offset between the two areas(the motion vector) has 1/4-pel resolution(for the luma component).Sub-pixel motion compensation can provide significantly better compression performance than integer-pixel compensation,at the expense of increased complexity.Quarter-pixel accuracy outperforms half-pixel accuracy.Motion estimation,whose efficiency has great effect to the whole coding efficiency,is an important part during the video coding process.In this paper,we compare the basic algorithm and some fast algorithms of 1/4-pel accuracy motion estimation,then put forward a fast algorithm which use composite vector.Experiments show that this algorithm is effective.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
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