电讯技术2017，Vol.57Issue(10)：1218-1223,6.DOI:10.3969/j.issn.1001-893x.2017.10.019
面向HEVC的Golomb-Rice编码参数自适应策略
HEVC-oriented Golomb-Rice Parameter Adaptive Strategy
摘要
Abstract
In order to further reduce high efficiency video coding( HEVC) output rate,this paper presents an improved algorithm of Context-based Adaptive Arithmetic Coding( CABAC) . Firstly,by using the fea-ture that the large size transform unit( TU) and the transform skip mode coefficient block has more large coefficients in CABAC, according to the distribution characteristics of the coded 4 × 4 coefficients array ( CG) in 32 × 32 transform unit, the initial Golomb-Rice parameter of the next CG is adaptively deter-mined. Then,in the transform skip mode coefficient block,the initial Golomb-Rice parameter is set to 1, and then the coding parameter of the next coefficient is adaptively determined according to the absolute val-ue of the coded coefficients. The experimental results show that,compared with the HEVC standard algo-rithm HM16. 0,the proposed algorithm brings down the bit rate by 0. 09% ~2. 75%,the average efficiency is more than 90%,peak signal-to-noise ratio(PSNR) has no loss and coding time is only increased by 0. 08%. Compared with the representative literature,the proposed algorithm can save the average bit rate by 0. 49%,and PSNR is increased by an average of 0. 01 dB.关键词
高性能视频编码/哥伦布-莱斯(Golomb-Rice)参数/变换跳过模式/自适应策略Key words
high efficiency video coding( HEVC)/Golomb-Rice parameter/transform skip mode/adaptive strategy分类
信息技术与安全科学引用本文复制引用
夏德春,何小海,韩兴阳,叶宇昀,吴小强..面向HEVC的Golomb-Rice编码参数自适应策略[J].电讯技术,2017,57(10):1218-1223,6.基金项目
国家自然科学基金资助项目(61471248) （61471248）
四川省科技计划项目(2015JY0189) （2015JY0189）
四川省教育厅2014 年研究生教育改革项目(2014-教-034) （2014-教-034）
