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计算机工程 ›› 2008, Vol. 34 ›› Issue (19): 228-229,. doi: 10.3969/j.issn.1000-3428.2008.19.077

• 多媒体技术及应用 • 上一篇    下一篇

改进的H.264快速帧内预测模式选择算法

王 慧,常建平   

  1. (南京航空航天大学信息科学与技术学院,南京 210016)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-10-05 发布日期:2008-10-05

Improved Fast Intra Prediction Mode Decision Algorithm for H.264

WANG Hui, CHANG Jian-ping   

  1. (College of Information Science & Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016)
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-10-05 Published:2008-10-05

摘要: 为了减小H.264编码算法的复杂度,提出一种快速的帧内模式选择算法。根据宏块内部相邻像素差的特点判定宏块预测类型,对基于边缘方向直方图的Pan算法进行改进,利用改进的算法对选定了预测类型的宏块进行预测,选出最佳的预测模式。实验结果表明,该算法在保证失真率和码率性能的前提下,编码时间平均减少了71.6%,大大提高了编码效率。

关键词: H.264标准, 帧内预测, 预测模式选择

Abstract: In order to reduce the complexity of H.264 encoding algorithm, this paper proposes a fast mode decision algorithm for intra prediction. The prediction type of a macroblock is decided according to the differences between the neighboring pixels of a macroblock. Pan’s fast algorithm based on edge direction histogram is improved to predict the macroblock; therefore the best prediction mode is chosen. Experimental results show that the method can save the encoding time up to 71.6% averagely when guarantee the capability of the rate distortion and the bits rate, and it improves the encoding efficiency tremendously.

Key words: H.264 standard, intra prediction, prediction mode decision

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