【摘要】 随着数字音频发展,心理声学原理被应用到音频压缩技术中,以获得低比特传输速率和透明音质。分析先进音频编码器(AAC)的编码原理,主要介绍心理声学模型的改进音调探测方法,并给出了其实验结果。此方法对实时实现音频编码器的研究具有重要意义。更多还原

【Abstract】 With the development of digital audi o,psycho -acoustic principles appl y to the techniqueof audio compression,which have created possibilities of low bit rates and transparent audio q uality.This paper analyses audio compression principle of Advanced Audio Coder and concentrates on the modified tonality detectio n algorithmutilized by psycho -acou stic model.This pa-per also presents the result of experiments .It is very important to resea rch the application of psycho -acoustic principles.更多还原