ADAPTIVE PROBABILITY UPDATING OF LOOK-UP TABLE VALUES FOR ENCODING COEFF_TOKEN

摘要：

In the new H.264/AVC standard, when entropy coding mode is set to zero, residual block data is coded using a context adaptive variable length coding (CAVLC) scheme.The first VLC, coeff_token, encodes both the total number of nonzero coefficients and the number of trailing ones. There are four choices of look-up table to use for encoding coeff_token for a 4×4 block. In this paper we discuss the results of assigning shorter codes to more probable pairs (Num-coeff, T1s) adaptively and vice versa. There are big gaps between the probability lines of three pairs ((0,0),(1,1) and (2,2)), so adaptive probability updating cant give better results. The probability lines of other pairs intersect each other and adaptive probability updating gives better results,but the probability (≈10 ％) of these pairs is very small.

关键词： H.264 Adaptive Probability Coeff_token

作者: JAMIL-UR-REHMAN YE ZHANG

作者单位: Department of Electronics and Communication Engineering, Harbin Institute of Technology, Harbin 150001, China

会议类型: 国际会议

会议名称: 2006 International Conference on Machine Learning and Cybernetics(IEEE第五届机器学习与控制论坛)

会议地点: 大连

会议语种:英文

页码: 3760-3764

在线出版日期: 2006-08-13（万方平台首次上网日期，不代表论文的发表时间）