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

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题名:	Zero-Block Mode Decision Algorithm for H.264/AVC
作者:	Lee,YM;Lin,YY
贡献者:	通訊工程研究所
关键词:	GENERAL-METHOD;OPTIMIZATION;PREDICTION;DCT
日期:	2009
上传时间:	2010-06-29 20:13:01 (UTC+8)
出版者:	中央大學
摘要:	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.
關聯:	IEEE TRANSACTIONS ON IMAGE PROCESSING
显示于类别:	[通訊工程研究所] 期刊論文

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