用数字技术实现语音信号实时延时的方法

本文阐述了一种实用的语音信号实时延时方法、对信噪比作了估算,描述了采样频率的选取方法,并对延时时间作了推导。它和一般语音处理器的不同之处主要在于时序控制的方式相异。实践证明,通过对逐个存贮单元的先读后写方法,能使语音信号不断输入,延时信号不断输出,从而逼真地模拟了回声,扩大了用途。

Realization of Real-time Delay of Sound Signal with Digital Technique

This practical method differs from ordinary sound processors in sequential control. Estimation of signal-noise ratio, selection of sampling frequency and calculation of delay time are made. Practice proves that the continuous input of sound signal cell one by one and continuous output of time delay signal can be realized by writing-after-reading the memory, thus lifelikely simulating the echo and broadening its applications.