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Fast CU size decision and mode decision algorithm for intra prediction in HEVC

机译：HEVC中帧内预测的快速CU大小决策和模式决策算法

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摘要

In the intra prediction process, High Efficiency Video Coding (HEVC) provides a quadtree-based coding unit (CU) block partitioning structure and up to 35 kinds of prediction modes to improve the coding performance. These technologies improve the coding efficiency significantly while the coding complexity is simultaneously increased rapidly as well. In this paper, a novel fast CU size decision and mode decision algorithm is proposed for the intra prediction of HEVC. The overall algorithm consists of two processes, the fast CU size decision and fast mode decision. In the fast CU size decision process, we adopt an adaptive discretization total variation (DTV) threshold-based CU size determination algorithm to skip some specific depth levels. In the fast mode decision process, an orientation gradient-based mode decision is proposed to reduce the candidate modes involved in the rough mode decision (RMD) and the rate distortion optimization (RDO) process. The experimental results on the HEVC reference software HM demonstrate that the proposed algorithm can significantly reduce the coding time with negligible performance loss.
机译：在帧内预测过程中，高效视频编码（HEVC）提供了基于四叉树的编码单元（CU）块划分结构和多达35种预测模式，以提高编码性能。这些技术大大提高了编码效率，同时编码复杂度也迅速提高。本文针对HEVC的帧内预测，​​提出了一种新的快速CU尺寸决策和模式决策算法。整个算法由两个过程组成，快速CU大小确定和快速模式确定。在快速CU尺寸决策过程中，我们采用基于阈值的自适应离散化总变化（DTV）CU尺寸确定算法来跳过某些特定深度级别。在快速模式决策过程中，提出了一种基于方向梯度的模式决策，以减少在粗糙模式决策（RMD）和速率失真优化（RDO）过程中涉及的候选模式。在HEVC参考软件HM上的实验结果表明，该算法可以显着减少编码时间，而性能损失却可以忽略不计。

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  • 来源
    《Multimedia Tools and Applications》 |2017年第2期|2001-2017|共17页
  • 作者

    Song Yun; Zeng Ye; Li Xueyu; Cai Biye; Yang Gaobo;

  • 作者单位

    Changsha Univ Sci & Technol, Sch Comp & Commun Engn, Changsha, Hunan, Peoples R China|Hunan Univ, Sch Informat Sci & Engn, Changsha, Hunan, Peoples R China|Changsha Univ Sci & Technol, Hunan Prov Key Lab Intelligent Proc Big Data Tran, Changsha, Hunan, Peoples R China;

    Changsha Univ Sci & Technol, Sch Comp & Commun Engn, Changsha, Hunan, Peoples R China|Changsha Univ Sci & Technol, Hunan Prov Key Lab Intelligent Proc Big Data Tran, Changsha, Hunan, Peoples R China;

    Changsha Univ Sci & Technol, Sch Comp & Commun Engn, Changsha, Hunan, Peoples R China|Changsha Univ Sci & Technol, Hunan Prov Key Lab Intelligent Proc Big Data Tran, Changsha, Hunan, Peoples R China;

    Changsha Univ Sci & Technol, Sch Comp & Commun Engn, Changsha, Hunan, Peoples R China|Changsha Univ Sci & Technol, Hunan Prov Key Lab Intelligent Proc Big Data Tran, Changsha, Hunan, Peoples R China;

    Hunan Univ, Sch Informat Sci & Engn, Changsha, Hunan, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    High efficiency video coding; CU size decision; Mode decision algorithm; Intra prediction;

    机译：高效视频编码;CU尺寸决策;模式决策算法;帧内预测;

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