H1264öAVC 标准中的CABAC 应用研究于培松, 郭宝龙(西安电子科技大学机电工程学院IC IE 研究所 陕西西安 710071)摘 要: H1264öAVC 是由国际电信联盟( ITU ) 和国际标准化组织( ISO ) 共同制定的新一代视频编码标准。他的熵编码方案采纳了基于上下文的自适应二进制算术编码(CABAC)。CABAC 是一种高效的熵编码, 他利用上下文建模来降低符号间的冗余度, 并且能够自适应码流的统计信息, 获得很高的编码效率。深入研究了CABAC 中的二进制化、上下文建模和自适应二进制算术编码器, 并进行了相应的试验。实验结果表明: 在相同的图像质量下, CABAC 和CAVLC 相比节省6%~ 15% 的码率。关键词: CABAC; 算术编码; 上下文建模; H1264öA VC中图分类号: TN 91918 文献标识码: B 文章编号: 1004 373X (2005) 07 005 04Appl ica t ion Research of CABAC in the H1264öAVC StandardYU Peisong, GUO Bao long( IC IE Institute, Schoo l of Electro M echanical Engineering, Xidian U niversity, Xi′an, 710071, Ch ina)Abs tra c t: The emerging H1264öA VC video coding standard is developed co llabo rat ively by the ITU T and ISOö IEC1Its designa2t ion of ent ropy coding adop ts Context based A dap t ive B inaryA rithmet ic Coding (CABAC) 1 CABAC is a h igh ly efficient ent ropy cod2ing, w h ich ut ilizes context modeling to reduce the redundancy betw een symbo ls1 CABAC can adap t itself to the stat ist ics of videost ream, and gains h igh ly efficient of coding1 Th is paper deep ly studies binarizat ion, context modeling and adap t ive binary arithmet iccoder of CABAC, and the co rresponding experiment has been perfo rmed1 The experiment indicates that CABAC saves 6%~ 15% bitrate than Context A dap t ive V ariable L ength Coding (CAVLC) w ith the same quality of image1Ke yw o rds: CABAC; arithmet ic coding; context modeling; H1264öA VC