作　　者： ; ;

机构地区： 华南理工大学电子与信息学院无线电与自动控制研究所

出　　处： 《华南理工大学学报（自然科学版）》 2004年第2期23-27,共5页

摘　　要： 从理论上分析和比较了不同应用场合的电话会议系统中单通路传输音频信号立体声化的几种方法 .利用简化的头相关传输函数对单音频信号进行处理 ,使之扩展为两路立体声信号 ,同时指出了这种方法存在的局限性和需改进的方面 .另外 ,在论述自适应的多路回波消除问题和原因后 ,分析和比较了现有的几种消除结构 ,指出采用每空间一个滤波器的合成立体声回波消除结构 。 Taking into consideration of the different situations in which the des ktop conference system was applied, several solutions to the synthesis of stereo signals from mono acoustic signals were theoretically analyzed and compared, wi th emphasis on the processing method of the simplified head related transfer fun ction. In this method, mono acoustic signals were processed and extended to ster eo signals. The limitation and the aspects to be improved of the proposed method were also indicated. Moreover, by discussing the self-adaptive acoustic echo ca ncellation and its causes, several existing echo cancellation structures were an alyzed and compared. It is indicated that the structure with a single filter per spatial region is a promising direction of research in echo cancellation, in wh ich synthesizing stereo signal and setting filter are perfectly combined.

关 键 词： 立体声 头相关传输函数 声学回波消除 电话会议系统

领　　域： [电子电信] [电子电信]