计算机与现代化

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基于HEVC的帧内快速模式选择算法

  

  1. 北京工业大学计算机学院,北京100124
  • 收稿日期:2014-03-19 出版日期:2014-05-28 发布日期:2014-05-30
  • 作者简介:申文龙(1988-),男,黑龙江佳木斯人,北京工业大学计算机学院硕士研究生,研究方向:多媒体视频压缩编码。

Fast Mode Decision Algorithm for Intra-frames Coding in HEVC

  1. College of Computer Science, Beijing University of Technology, Beijing 100124, China
  • Received:2014-03-19 Online:2014-05-28 Published:2014-05-30

摘要: 为了解决高效率视频编码(High Efficiency Video Coding,HEVC)复杂度过高的问题,基于粗粒度模式选择(Rough Mode Decision,RMD)过程提出一种降低编码复杂度的方法。该算法充分利用了RMD候选队列的相似程度和预测模式在方向上的相关性这两个特性,进一步减少了进入率失真优化过程(Rate Distortion Optimization,RDO)的预测模式数量,达到了降低编码复杂度的目的。实验结果表明,该算法在编码质量损失0.5%的情况下节省了近22%的编码时间。

关键词: 多媒体技术, 数字图像, 高效视频编码, 帧内预测, 快速模式选择

Abstract: We propose an algorithm for High Efficiency Video Coding (HEVC) standard based on Rough Mode Decision (RMD) process to decrease the coding complexity. In this algorithm, we make full use of the similarity of the candidate mode lists from parent prediction unit and child prediction unit and merge the prediction modes into several groups to further reduce the number of prediction modes which may be checked by encoder in Rate Distortion Optimization (RDO) process. Experimental result shows nearly 22% computational saving with 0.5% coding loss.

Key words: multimedia technology, digital image, HEVC, intra-frames prediction, fast mode decision

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