一种新的H.264/AVC快速帧内预测模式选择判决算法

刘佳; 董金明

doi:10.3724/SP.J.1146.2008.00240

一种新的H.264/AVC快速帧内预测模式选择判决算法

doi: 10.3724/SP.J.1146.2008.00240

刘佳,
董金明

计量
- 文章访问数: 3313
- HTML全文浏览量: 77
- PDF下载量: 1010
- 被引次数: 0
出版历程
- 收稿日期: 2008-03-09
- 修回日期: 2008-07-14
- 刊出日期: 2009-05-19

An Improved Intra-frame Prediction Mode Selection Algorithm for H.264/AVC

摘要

摘要: 针对H.264视频编码标准帧内预测模式选择部分计算量大的问题，本文提出了一种快速帧内预测模式选择判决算法。该算法首先提出了一个新的算子，用来描述图像灰度分布信息，作为判断图像复杂程度的依据，进而提出两个对量化系数(QP)自适应的阈值，将图像分为平滑、变化剧烈和特征模糊3种。平滑图像宏块使用Intra_1616模式预测，变化剧烈的宏块使用Intra_44模式预测，特征模糊的宏块使用标准算法预测。实验结果表明，该优化算法能在保证很好的图像质量的同时，使帧内模式选择计算次数减少30%以上，而且对传输码率基本没有影响。
- H.264;帧内预测;模式选择;自适应阈值
Abstract: In this paper, to simplify the computational complexity of intra-frame prediction mode selection for H.264, an improved Intra-frame prediction mode selection algorithm is proposed. Firstly, a new operator is proposed to describe the gray-level info of an image which could be the image complexity degree criterion. Then two QP (Quality Parameter)-based adaptive thresholds are proposed and images can be divided into three kinds: smooth, variability and in fuzzy feature. Intra_1616 mode is used when the macroblock is smooth, Intra_44 mode is used when the macroblock is variability and the original algorithm is used when the macroblock is in fuzzy feature. Experimental results show that the improved algorithm almost has 30% decrement on intra-frame mode selection times, meanwhile the image quality is still good enough with a neglectable rate increase.

HTML全文

参考文献(1)

Richardson I E G. H.264 and MPEG-4 Video Compression[M]. England: John Wiley Sons Ltd, 2004: 159-164.Yang Chun-ling, Po Lai-nan, and Lam Wing-hong. A fastH.264 intra prediction algorithm using macroblock properties[C]. IEEE International Conference on Image Processing,Singapore, 2004: 461-464.[2]Chun Seong-Soo, Kim Jung-Rim, and Sull Sang-hoon. Intraprediction mode selection for flicker reduction in H[J].264/AVC[C]. IEEE Trans. on Consumer Electronics.2006, 52(4):1303-1310[3]谢晶, 贾克斌. 一种基于二维直方图的H.264/AVC 快速帧内预测判决算法[J]. 电子与信息学报, 2005, 27(7): 1053-1057.Xie Jing and Jia Ke-bin. A fast intra-frame predictionalgorithm based on two-dimensional histogram for H.264/AVC[J]. Journal of Electronics Information Technology,2005, 27(7): 1053-1057.[4]Lin Yu-Kun and Chang Tian-Sheuan. Fast block typedecision algorithm for intra prediction in H.264 FRExt[C].IEEE International Conference on Image Processing, Genova,2005: 585-588.[5]孟庆磊, 姚春莲, 宋建斌, 李炜. 一种面向H.264/AVC 的快速帧内预测选择算法[J]. 北京航空航天大学学报, 2007, 33(2):219-223.Meng Qing-lei, Yao Chun-lian, Song Jian-bin, and Li Wei.Fast selective algorithm of Intra prediction for H.264/AVC[J].Journal of Beijing University of Aeronautics andAstronautics, 2007, 33(2): 219-223.[6]Wang Zheng-ning, Yang Jun, Peng Qiang, Ma Zheng, andZhu Chang-qian. A fast transform domain based algorithmfor H.264/AVC intra prediction[C]. IEEE InternationalConference on Multimedia and Expo (ICME2007), Beijing,2007: 1563-1566.[7]欧阳合, 韩军. H.264 和MPEG-4 视频编码 [M]. 长沙: 国防科技大学出版社, 2004: 185-190.Ouyang He and Han Jun. H.264 and MPEG-4 VideoCompression [M]. Chang Sha: National University of DefenseTechnology Press, 2004: 185-190.[8]韩青, 李莉, 应骏. H.264 帧内44 块预测模式选择快速算法研究[J]. 中国图象图形学报, 2007, 12(10): 1745-1748.Han Qing, Li Li, and Ying Jun. On fast intra prediction modedecision algorithm for 44 blocks in H.264[J]. Journal ofImage and Graphics, 2007, 12(10): 1745-1748.[9]余成伟, 陆建华, 郑君里. H.264 编码模式选择快速算法研究[J]. 清华大学学报, 2007, 47(10): 1677-1680.Yu Cheng-wei, Lu Jian-hua, and Zheng Jun-li. Research onfast mode decision algorithm for H.264[J]. Journal ofTsinghua University (Sci Tech), 2007, 47(10): 1677-1680.[10]Gonzalez R C. Digital Image Processing[M]. Second Edition.London: Prentice Hall, 2002: 71-75.[11]沈兰荪, 卓力. 小波编码与网络视频传输[M]. 北京: 科学出版社, 2005: 239-243.Shen Lan-sun and Zhuo Li. Wavelet Coding and InternetVideo Transmission[M]. Beijing: Science Press, 2005:239-243.

施引文献

资源附件(0)

访问统计