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Title of Journal: Multimed Tools Appl

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Abbravation: Multimedia Tools and Applications

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Springer US

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DOI

10.1007/bf02020903

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1573-7721

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An improved block size selection method based on m

Authors: Xiangwen Wang Jun Sun Rong Xie Songyu Yu Wenjun Zhang
Publish Date: 2009/01/23
Volume: 43, Issue: 2, Pages: 131-143
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Abstract

The H264 video compression standard supports seven variable block sizes ranging from 4 × 4 to 16 × 16 for one Macro Block MB with 16 × 16 size to conduct motion estimation ME and compensation This new feature achieves significant coding gain at the cost of huge computation complexity Dozens of fast mode decision algorithms with fast block size selection have been proposed to reduce complexity In this paper we propose an improved fast block size selection method based on MB movement characteristic The Motion Vector MV and block residual are employed to analyze the movement characteristic of one MB novelly Then the movement characteristic is used to decide whether and how to merge or split the MB for encoding Experimental results show that this method speeds up mode decision procedure dramatically with negligible compression performance degradation

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