The Context Based Adaptive Binary Arithmetic Coding In H.264

The new ITU-T/ISO/IEC standard H.264/AVC for video compression applies most of the new fruits in video compression,compared with the various existing standards, to obtain the same video quality,the bit rate of H.264 can reduce to less than half of the former standards,this also means the video quality can be greatly improved when adopts the same bit rate.The features of H.264,the encoding and decoding of data are discussed in this paper.A deep study is made on the basic principles of the context_based adaptive binary arithmetic coding(CABAC),and the realization of algorithms is studied as well. The study focuses on the entropy-encoding and entropy-decoding schemes of CABAC: the binarization in entropy-encoding scheme,context modeling and the detailed model design of entropy-encoding and entropy-decoding are discussed.Based on the analysis of the similarities and differences of the encoding and decoding,we realized the encoding and decoding of data with the CABAC.