计算机工程与应用 ›› 2011, Vol. 47 ›› Issue (9): 171-174.

• 图形、图像、模式识别 • 上一篇    下一篇

H.264视频最佳宏块模式快速选择

蒋志平1，艾云峰2，侯向宁1   

  1. 1.成都理工大学 工程技术学院，四川 乐山 614000
    2.中国科学院 研究生院 计算与通信工程学院，北京 100049
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-03-21 发布日期:2011-03-21

Fast optimal macroblock mode selection for H.264 video

JIANG Zhiping1，AI Yunfeng2，HOU Xiangning1   

  1. 1.College of Engineering & Technique of Chengdu University of Technology，Leshan，Sichuan 614000，China
    2.College of Computing & Communication Engineering，Graduate University of the Chinese Academy of Sciences，Beijing 100049，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-03-21 Published:2011-03-21

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摘要： H.264现有的高复杂度多模式运动估计和模式选择占据了大部分编码时间，提出了一种新的最佳宏块模式选择算法来加速模式选择过程。通过对宏块模式的时间与空间预测，并结合宏块率失真代价的统计特性，对宏块所有编码模式划分成不同优先级的集合，实现最佳宏块模式的快速判定。实验表明，该算法在大幅度降低编码时间的同时，对宏块模式判断的准确性有了进一步的提升。

关键词: 视频编码, H.264, 模式选择, 率失真

Abstract: With a majority of the total complexity，motion estimation is the most computationally expensive part.In this paper a novel algorithm to speed up the inter-mode selection process for the H.264 encoding is presented.The proposed scheme determines the best coding mode of a given macroblock from several mode sets with different priorities by predicting the best mode from neighboring macroblocks in time and in space and by estimating its Rate-Distortion（RD） cost from the macroblock in the previous frame.Experimental results have shown that the proposed algorithm has a further improvement of accuracy of mode decision with significant encoding time degradation.

Key words: video encoding, H.264, mode selection, rate-distortion

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