混响效应与去混响方法

Reverberation effect and reverberation method

在免提电话、电视电话会议系统、助听器、人机对话系统等应用中,混响效应是影响语音信号可懂度的重要因素,同时在立体声影院、立体声汽车音响系统等应用中,它也是影响双耳立体声效果的重要因素。可以通过对麦克风阵列输出信号的混响后补偿,或对扬声器阵列播放信号进行混响预补偿,实现去混响。到目前为止,已有多种不同的去混响方法,文中对这些已有方法进行了较为系统的论述。

In the applications of high-performance hand free telephone, teleconferencing system, hearing aids, human-machine talking system, reverberation is an important factor which will degrade the intelligibility of speech signals, meanwhile, in the applications of stereo cinema, in-car binaural audio system, it is also an important factor which will degrade stereo effect. Dereverberation can be implemented by post-compensation for microphone array output signals,or by pre-compensation for the input signals of loudspeaker array. Many dereverberation approaches have been proposed so far, this is a survey on these existing approaches.