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基于上下文的自适应二阶二进制算术编码算法 被引量:2

Context-based adaptive 2-level binary arithmetic coding algorithm
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摘要 H.264是国际上最新的视频编解码标准,是未来几年内视频编码技术研究的主要方向。基于上下文的二进制算术编码算法(CABAC)是H.264中一种能适应信号统计特性的变化,容易达到渐进性能的高效率的熵编码算法。提出了基于CAB-AC的二阶二进制算术编码算法(2-CABAC),把待编码比特流binstring转换成thetastring,通过对thetastring进行编码提高对binstring的压缩比。给出了2-CABAC的原理、设计方法和程序流程。测试结果表明,与CABAC相比较,2-CABAC明显提高了压缩比。最后,对转换函数Phi的设计进行了讨论。 H.264 is the newest video coding recommendation in the world, which is the focus of video coding technology in the future years. Context-based adaptive 2-level binary arithmetic coding (2-CABAC) algorithm, which is based on CABAC, is presented. The algorithm converts bin string into theta string and improves the performance by coding the theta string. The principle, designing method and program flowchart are introduced. The experimental result shows that the compression ratio of 2-CABAC, compared to CABAC, is obviously improved. At last, the design of the converting function Phi is discussed.
出处 《计算机工程与设计》 CSCD 北大核心 2006年第17期3267-3269,共3页 Computer Engineering and Design
关键词 视频编码 H.264 熵编码 算术编码 CABAC video coding H.264 entropy coding arithmetic coding CABAC
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参考文献8

  • 1Joint video team (JVT) of ISO/IEC MPEG and ITU-T VCEG rraft ITU-T recommendation and final draft international standard of joint video specification[S].Pattaya,Thailand:Final Committee Draft,Document JVT-G050,7th Meeting,2003.7-14.
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二级参考文献18

  • 1张杰,童胜.H.264/AVC中二进制算术编码的分析与研究[J].电子科技,2003,16(24):28-31. 被引量:6
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