计算机工程

• 多媒体技术及应用 • 上一篇    下一篇

一种快速HEVC帧内预测模式决策算法

雷海军1,2,3,危 雄1,2,3,杨 张4,袁梅冷4   

  1. (1. 深圳大学计算机与软件学院,广东 深圳 518060;2. 广东省普及型高性能计算机重点实验室,广东 深圳 518060;3. 深圳市服务计算与应用重点实验室,广东 深圳 518060;4. 深圳职业技术学院,广东 深圳 518060)
  • 收稿日期:2013-01-28 出版日期:2014-05-15 发布日期:2014-05-14
  • 作者简介:雷海军(1968-),男,副教授,主研方向:图像处理,网络多媒体技术;危 雄,硕士研究生;杨 张,硕士;袁梅冷,副教授。
  • 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);深圳大学校重点基金资助项目(2213k3190007)。

A Fast Mode Decision Algorithm for Intra Prediction in HEVC

LEI Hai-jun 1,2,3, WEI Xiong 1,2,3, YANG Zhang 4, YUAN Mei-leng 4   

  1. (1. College of Computer Science & Software Engineering, Shenzhen University, Shenzhen 518060, China; 2. Key Laboratory of Affordable High Performance Computer in Guangdong Province, Shenzhen 518060, China; 3. Key Laboratory of Service Computing and Application at Shenzhen, Shenzhen 518060, China; 4. Shenzhen Polytechnic, Shenzhen 518060, China)
  • Received:2013-01-28 Online:2014-05-15 Published:2014-05-14

摘要: 高性能视频编码(HEVC)标准是视频编码联合小组提出的新的视频编码标准。针对HEVC帧内预测模式决策的高计算复杂度问题,提出一种基于边缘方向强度检测的快速帧内预测模式决策算法。将35种帧内预测模式根据5个基本方向分为5个预测候选模式集合,每个集合中有11种预测模式。分别计算预测单元(PU)的5个方向的方向强度,以及每个方向所占比例,选择比例最大的方向所对应的候选模式集合为该PU块的候选预测模式,有效减少帧内预测的计算复杂度。实验结果证明,与HM8.0相比,该算法能够以保证视频质量为前提,在高效率条件和低复杂度条件下平均节省15%和18%的编码时间。

关键词: 视频编码, 高性能视频编码标准, 帧内预测, 预测单元, 模式决策, 边缘方向检测

Abstract: High Efficiency Video Coding(HEVC) is a kind of new standard of video coding developed by the Joint Collaborative Team on Video Coding(JCT-VC). For the problem of high computational complexity of intra prediction in HEVC, a fast intra prediction algorithm based on edge direction detection is proposed. The proposed method divides 35 intra prediction modes into 5 sets of candidate modes according to 5 basic directions, and each set contains 11 intra prediction modes. The edge direction strength of Prediction Unit(PU) in 5 directions are calculated. The proportion of each direction is calculated and the candidate modes are selected to set corresponding edge direction with the largest proportion as best candidate modes for PU to reduce computational complexity effectively. Experimental results show that the proposed method saves encoding time of 15% and 18% on average compared with HM8.0 in high efficiency and low complexity.

Key words: video coding, High Efficiency Video Coding(HEVC) standard, intra prediction, Prediction Unit(PU), mode decision, edge direction detection

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