计算机应用与软件Issue(1)：197-200,4.DOI:10.3969/j.issn.1000-386x.2014.01.052
基于时／空相关性的H．264帧内预测算法
INTRA-FRAME PREDICTION ALGORITHM FOR H.264 BASED ON TEMPORAL AND SPATIAL CORRELATIONS
陈霞 1赵军锁1
作者信息
- 1. 中国科学院软件研究所天基综合信息系统重点实验室 北京 100190
- 折叠
摘要
Abstract
In order to reduce the encoding complexity in H.264,we propose a fast intra-frame prediction algorithm which is based on temporal and spatial correlations.Making full use of the advantage of temporal correlation of video sequence,the algorithm adaptively prejudges current macroblock according to previous coded macroblocks,and selects between the prediction approaches of Intra_4 ×4 and Intra_16 ×16;For Intra_4 ×4 prediction,it decides the candidate modes for current 4 ×4 sub-macroblock according to mode-gathering characteristic and referring the statistic characteristics of prediction mode of coded macroblocks in pre-frame and current frame.Experimental result shows that the algorithm reduces the encoding time by 40% with a neglectable PSNR change and bit rate increase,improves encoding efficiency.关键词
H.264标准/帧内预测/编码复杂度/时间/空间相关/模式选择Key words
H.264 standard/Intra-frame prediction/Coding complexity/Temporal and spatial correlations/Mode decision分类
信息技术与安全科学引用本文复制引用
陈霞,赵军锁..基于时／空相关性的H．264帧内预测算法[J].计算机应用与软件,2014,(1):197-200,4.
