基于反向滤波器的混响设计与仿真分析  

Design and Simulation Analysis of Reverberation Based on Reverse Filter

作　　者：朱敏[1] 黄敏 蒋程洋 欧凯 夏孟培 ZHU Min;HUANG Min;JIANG Chengyang;OU Kai;XIA Mengpei(Tongda College,Nanjing University of Posts and Telecommunications,Jiangsu 225127,China)

机构地区：[1]南京邮电大学通达学院,江苏225127

出　　处：《电子技术（上海）》2022年第3期1-3,共3页Electronic Technology

摘　　要：阐述在封闭的空间接收的声音信号经常由于房间比较大,声音反射会产生混响信号,当混响比较强的时候严重影响了语音通话质量,减小混响或者去除混响是语音信号处理的主要任务之一。其基本方法是先测到声源和麦克风之间的传递函数,然后求传递函数的最小相位函数,在最小相位函数的基础上求传递函数的反函数。探讨传统的求最小相位函数的方法,提出一种新的求最小相位函数的方法,对应的求传递函数的反函数的方法。仿真的结果显示新方法更能够很好的从混响的语音信号中恢复中原始的语音信号。Sound signals received in enclosed spaces are often reverberant due to room size and sound reflection. When the reverberation is strong, the quality of voice communication is seriously affected, so reducing reverberation or removing reverberation is the main task for speech signal processing. The transfer function between the sound source and the microphone is measured, then the minimum phase function of the transfer function is obtained, and the inverse function of the transfer function is obtained on the basis of the minimum phase function. This paper mainly introduce the traditional method of the minimum phase function, then propose a new method of the minimum phase function proposed in this paper, and the corresponding method of the inverse function of the transfer function. The simulation results show that the proposed method can recover the original speech signal from reverberation speech signal.

关 键 词：信号分析 语音信号 去混响 反向滤波器 

分 类 号：TN03[电子电信—物理电子学] TN641