通信学报 ›› 2015, Vol. 36 ›› Issue (9): 76-81.doi: 10.11959/j.issn.1000-436x.2015239

• 学术论文 • 上一篇    下一篇

考虑视频内容的H.265/HEVC帧层码率分配算法

李维1,杨付正2,任鹏2   

  1. 1 西安理工大学 印刷包装与数字媒体学院，陕西 西安 710048
    2 西安电子科技大学 通信工程学院，陕西 西安 710071
  • 出版日期:2015-09-25 发布日期:2017-09-15
  • 基金资助:
    国家自然科学基金资助项目;国家自然科学基金资助项目;高等学校学科创新引智计划基金资助项目;校科研启动基金资助项目

H.265/HEVC frame-level bitrate allocation algorithm considering video content

Wei LI1,Fu-zheng YANG2,Peng REN2   

  1. 1 Faculty of Printing,Packaging and Digital Media Technology,Xian University of Technology,Xi'an 710048,China
    2 Faculty Communication Engineering,Xidian University,Xi'an 710071,China
  • Online:2015-09-25 Published:2017-09-15
  • Supported by:
    The National Natural Science Foundation of China;The National Natural Science Foundation of China;The Project of Introducing Talents of Discipline to Universities;The School Scientific Research Project

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摘要：

为了保证一定视频质量下编码器输出的码率符合给定的目标码率，提出一种考虑视频内容特性的H.265/HEVC 帧层码率分配算法。首先从率失真理论分析的角度推导出影响输出码率的主要因素，然后根据视频编码原理，预测出帧内容复杂度参数，从而建立一种更有效的帧层码率分配算法。实验结果表明，所提算法可以使帧层目标码率与编码码率保持更好的一致性，且重构视频质量平均提高了0.103 dB。

关键词: 码率分配, 内容特性, 速率控制, H.265/HEVC

Abstract:

In order to guarantee the consistency between the coded bits and target bits,a frame-level bitrate allocation al-gorithm considering the content feature was proposed for H.265/HEVC codec.The main factors to affect the output bi-trate were first discussed by the analysis of rate-distortion theory.According to the video coding principle,the related pa-rameter was then predicted to reflect the content complexity.Finally,an efficient frame-level bitrate allocation algorithm was constructed.Experimental results show that the target bits and coded bits keep a better consistency,and the recon-struction video quality is improved by 0.103 dB in average.

Key words: bitrate allocation, content feature, rate control, H.265/HEVC

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