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计算机工程 ›› 2015, Vol. 41 ›› Issue (1): 240-244. doi: 10.3969/j.issn.1000-3428.2015.01.045

• 多媒体技术及应用 • 上一篇    下一篇

一种面向HEVC的编码单元深度决策算法

姚晓敏,王万良,岑跃峰,王超超   

  1. 浙江工业大学计算机科学与技术学院,杭州 310023
  • 收稿日期:2014-03-07 修回日期:2014-04-02 出版日期:2015-01-15 发布日期:2015-01-16
  • 作者简介:姚晓敏(1986-),男,硕士,主研方向:视频编码传输,多媒体技术;王万良,教授、博士生导师;岑跃峰,博士研究生;王超超,硕士研究生。
  • 基金资助:
    国家自然科学基金资助项目(61379123);国家“十二五”科技支撑计划基金资助项目(2012BAD10B01)

A Depth Decision Algorithm of Coding Unit for HEVC

YAO Xiaomin,WANG Wanliang,CEN Yuefeng,WANG Chaochao   

  1. College of Computer Science & Technology,Zhejiang University of Technology,Hangzhou 310023,China
  • Received:2014-03-07 Revised:2014-04-02 Online:2015-01-15 Published:2015-01-16

摘要: 新一代高性能视频编码(HEVC)标准采用灵活的四叉树自适应存储结构、可变尺寸的编码块、35种帧内预测模式等新技术,能够有效提升HEVC的编码效率,但也造成了更高的编码复杂度。为此,提出一种基于时空相关性的编码单元深度决策算法。融合关联帧编码单元的深度信息及当前帧相邻编码单元的深度信息,从而预测当前编码单元的深度范围。实验结果表明,与HEVC标准测试算法相比,该算法能在不明显影响编码质量的基础上平均减少30.2%的编码时间。

关键词: 高性能视频编码标准, 编码单元, 编码复杂度, 时空相关性, 深度决策, 编码时间

Abstract: The emerging High Efficiency Video Coding(HEVC) standard adopts the quadtree-structured coding units,variable size of Coding Unit(CU),35 intra prediction modes,etc.Compared with other standards,HEVC provides higher coding efficiency,leading to higher coding complexity however.In order to reduce computational complexity,it proposes a depth decision algorithm for coding unit in HEVC by using the video temporal and spatial correlation.According to the depth in the previous and neighbor CU,it can pre-determine the candidate CU depth.Experimental results demonstrate that the proposed algorithm saves 30.2% encoding time on average while maintaining almost the same performance as the original HEVC algorithm.

Key words: High Efficiency Video Coding(HEVC) standard, Coding Unit(CU), coding complexity, temporal and spatial correlation, depth decision, coding time

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