公开(公告)号：US20100057454A1

公开(公告)日：2010-03-04

申请号：US12204608

申请日：2008-09-04

申请人： Asif Iqbal Mohammad ,  Steven L. Grant ,  Heejong Yoo ,  Deepak Challa

发明人： Asif Iqbal Mohammad ,  Steven L. Grant ,  Heejong Yoo ,  Deepak Challa

IPC分类号： G10L15/20

CPC分类号： H04M9/082 ,  H04B3/234

摘要： An echo canceller for improved recognition and removal of an echo from a communication device. The echo canceller can dynamically reduce echo using an improved energy estimator and an improved adaptive filter. The improved energy estimator can determine if conversation is in a single talk period or a double talk period based on the combined energy of both the near end background noise and speech. The improved adaptive filter can reduce echo by dynamically changing adaptation speed or step size. In double talk, the adaptive filter(s) can dynamically slow-down or stop adaptation. In single talk, the filter can dynamically increase the speed of adaptation to improve accuracy, or decrease adaptation speed for stability.

摘要翻译： 用于改善来自通信设备的回波的识别和去除的回波消除器。 回波消除器可以使用改进的能量估计器和改进的自适应滤波器来动态地减少回波。 改进的能量估计器可以基于近端背景噪声和语音的组合能量来确定对话是处于单个通话周期还是双重通话周期。 改进的自适应滤波器可以通过动态地改变自适应速度或步长来减少回波。 在双语中，自适应滤波器可以动态地减慢或停止适应。 在单声道中，滤波器可以动态地提高适应速度，以提高精度，或者降低适应速度以获得稳定性。