说明：  用同态滤波方法（倒谱）解决回声干扰问题。给出了一句语音，并在此信号上叠加回声干扰，通过倒谱的方法将信号和回声的冲击响应分开。
(using the same state filtering method (cepstrum) Echo solve the interference problem. Given a voice, and in this echo superimposed on the signal interference, through cepstrum approach would echo signals and respond to the impact of separation.)