计算机工程

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HEVC快速帧内模式决策算法

雷海军,杨忠旺   

  1. (深圳大学计算机与软件学院,广东 深圳 518060)
  • 收稿日期:2013-03-20 出版日期:2014-04-15 发布日期:2014-04-14
  • 作者简介:雷海军(1968-),男,副教授,主研方向:视频图像处理,嵌入式系统;杨忠旺,硕士研究生。
  • 基金项目:
    国家自然科学基金资助项目(60972037);广东省部产学研基金资助项目(2012B091100495, 2009B090300267);深圳市基础研究基金资助项目(JCYJ20120613113419607)。

Fast Intra Mode Decision Algorithm in HEVC

LEI Hai-jun, YANG Zhong-wang   

  1. (College of Computer and Software, Shenzhen University, Shenzhen 518060, China)
  • Received:2013-03-20 Online:2014-04-15 Published:2014-04-14

摘要: 在高效视频编码(HEVC)标准中,为降低编码单元和预测单元算法的计算复杂度,提出一种基于编码单元纹理和预测单元模式决策的快速帧内预测算法。通过统计编码单元的纹理复杂度,分析编码单元纹理的相关性,设定合理的纹理阈值,快速地决策当前编码单元的大小。改进预测单元模式决策算法,利用三步搜索方法,减少候选模式数量和帧内模式预测时间。算法结合了编码单元和预测单元的特点,仿真结果表明,与HEVC 参考软件HM8.0相比,在增加较少码率,降低较少峰值信噪比的情况下,该算法的编码时间平均缩减40.9%,降低了编码复杂度。

关键词: 高效视频编码, 计算复杂度, 编码单元, 预测单元, 纹理, 三步搜索法

Abstract: High Efficiency Video Coding(HEVC) is the latest video compression standard for high resolution video content. This paper analyzes the computational complexity of coding unit and prediction unit algorithm. A fast algorithm for intra prediction modes decision is proposed. This algorithm contents the relevance of texture complexity of coding unit, sets the rational threshold to select the size of coding unit fast, and reduces the number of candidate modes for improving intra prediction algorithm by the three-step search method. Combining the algorithm of coding unit and prediction unit, the final simulation results show that, compared with the recent HEVC conference software HM8.0, the proposed algorithm can reduce about 40.9% encoding time while suffers from negligible on bit rates performance.

Key words: High Efficiency Video Coding(HEVC), computational complexity, coding unit, prediction unit, texture, three-step search algorithm

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