One adaptive binary arithmetic coding system based on context

This article introduces one adaptive binary arithmetic coding system based on context. H.264/AVC is a new video coding standard developed by ITU-T VCEG and ISO/IEC MPEG. It includes many new technology features, such as Multi-mode prediction, Flexible Macro block Ordering (FMO), integer transform, Universal Variable Length Codes (UVLC), Context-based Adaptive Binary Arithmetic Coding (CABAC), laying code, error restriction machine, etc. This paper introduced the Context-based Adaptive Binary Arithmetic Coding (CABAC) method presented in H.264/AVC And it makes a comparison between CABAC and UVLC. Context-based Adaptive Binary Arithmetic Coding (CABAC) is a new entropy coding method presented in H.264/AVC that is highly efficient in video coding. In the method, the probability of current symbol will be estimated by using a well designed context model, which is adaptive and can approach to the statistic characteristic. Then an arithmetic coding mechanism will largely reduce the redundancy including inter symbol redundancy. Compared with UVLC method in the prior standard, CABAC is complicated but efficiently reduce the bit rate.