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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
[ "李维(1985-),女,陕西咸阳人,西安理工大学讲师,主要研究方向为视频编码、多媒体通信。" ]
[ "杨付正(1977-),男,山东德州人,西安电子科技大学教授、博士生导师,主要研究方向为视频编码、视频质量评估、多媒体通信。" ]
[ "任鹏(1984-),男,河南新乡人,西安电子科技大学博士后,主要研究方向为数字信号处理、模式识别等。" ]
网络出版日期:2015-09,
纸质出版日期:2015-09-25
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李维, 杨付正, 任鹏. 考虑视频内容的H.265/HEVC帧层码率分配算法[J]. 通信学报, 2015,36(9):76-81.
Wei LI, Fu-zheng YANG, Peng REN. H.265/HEVC frame-level bitrate allocation algorithm considering video content[J]. Journal on communications, 2015, 36(9): 76-81.
李维, 杨付正, 任鹏. 考虑视频内容的H.265/HEVC帧层码率分配算法[J]. 通信学报, 2015,36(9):76-81. DOI: 10.11959/j.issn.1000-436x.2015239.
Wei LI, Fu-zheng YANG, Peng REN. H.265/HEVC frame-level bitrate allocation algorithm considering video content[J]. Journal on communications, 2015, 36(9): 76-81. DOI: 10.11959/j.issn.1000-436x.2015239.
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。
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.
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