应用于立体声回波对消的非线性预处理方法的研究和实现

An Effective Nonlinear Preprocessing Solution to Stereophonic Acoustic Echo Cancellation

从降低输入信号之间互相关性出发,使用软限幅器模型对输入通道的两路信号进行非线性预处理.实验表明,所用方法与已有几种非线性预处理方法相比,不仅方法简单、实现容易,而且对声音的听觉效果影响小.最重要的是,度量立体声回波对消效果的重要参数———失配改善的效果特别显著.

In stereophonic acoustic echo cancellation a problem of nonuniqueness and misalignment occurs due to the high correlation between the two recorded signals. Authors propose a new solution called softlimiter model to this problem. Experiments show that the solution is better than those nonlinear preprocessing solutions proposed.