AVS无损音频编码标准——熵编码简介

AVS无损音频编码标准,简称AVS-LS,是AVS工作组制定的用于无损压缩音频数据的新标准。AVS-LS采用线性预测和熵编码来对音频数据进行压缩,其中熵编码器用于对线性预测产生的残差信号进行归一化处理及算术编码。介绍了AVS-LS熵编码器的结构及原理,并对AVS-LS的编码效率进行了测试。测试结果表明：AVS-LS的编码效率略低于MPEG-4 ALS,但高于MPEG-4 SLS和FLAC。

Introduction to AVS Lossless Audio Coding Standard:Entropy Coding

AVS Lossless Audio Coding Standard(AVS-LS) is a new standard produced by the Chinese AVS work-group for losslessly compressing digital audio data.AVS-LS uses linear prediction and entropy coding to com-press digital audio.In entropy coding,the prediction residual signals are first normalized,and then arithmetic coded.The structure and principle of the AVS-LS entropy coder are introduced.Experimental results show that the coding efficiency of AVS-LS is slightly lower than that of MPEG-4 ALS,but higher than t...