Zero-Block Mode Decision Algorithm for H.264/AVC

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/29089

Title:	Zero-Block Mode Decision Algorithm for H.264/AVC
Authors:	Lee,YM;Lin,YY
Contributors:	通訊工程研究所
Keywords:	GENERAL-METHOD;OPTIMIZATION;PREDICTION;DCT
Date:	2009
Issue Date:	2010-06-29 20:13:01 (UTC+8)
Publisher:	中央大學
Abstract:	In the previous paper [14], we proposed a zero-block intermode decision algorithm for H.264 video coding based upon the number of zero-blocks of 4 x 4 DCT coefficients between the current macroblock and the co-located macroblock. The proposed algorithm can achieve significant improvement in computation, but the computation performance is limited for high bit-rate coding. To improve computation efficiency, in this paper, we suggest an enhanced zero-block decision algorithm, which uses an early zero-block detection method to compute the number of zero-blocks instead of direct DCT and quantization (DCT/Q) calculation and incorporates two adequate decision methods into semi-stationary and nonstationary regions of a video sequence. In addition, the zero-block decision algorithm is also applied to the intramode prediction in the P frame. The enhanced zero-block decision algorithm brings out a reduction of average 27% of total encoding time compared to the zero-block decision algorithm.
Relation:	IEEE TRANSACTIONS ON IMAGE PROCESSING
Appears in Collections:	[Graduate Institute of Communication Engineering] journal & Dissertation

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