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    • 1. 发明授权
    • Echo canceller and echo cancellation method
    • 回波消除器和回波消除方法
    • US09282195B2
    • 2016-03-08
    • US14368953
    • 2012-03-15
    • Tao XueTao SunDongmei LiuJinjun WangQi ZhangXia Wang
    • Tao XueTao SunDongmei LiuJinjun WangQi ZhangXia Wang
    • H04M1/00H04M9/08G10K11/16
    • H04M9/082G10K11/16
    • An echo canceller and an echo cancellation method are provided. The echo canceller includes a self-adaptive filter, a voice signal detection portion and a path change detection portion; a far-end voice signal is propagated in an echo path through a speaker and is picked up by a microphone to form an echo signal. The self-adaptive filter is configured to receive the far-end voice signal as a training signal to simulate the echo path, and cancel the echo signal in a near-end signal. The voice signal detection portion is configured to detect a communication status, control the self-adaptive filter according to the communication status, and control startup of the path change detection portion according to the communication status. The path change detection portion is configured to detect whether a change occurs on the echo path, and control the self-adaptive filter according to whether the change occurs on the echo path.
    • 提供回声消除器和回声消除方法。 回波消除器包括自适应滤波器,语音信号检测部分和路径变化检测部分; 远端语音信号通过扬声器在回波路径中传播,并由麦克风拾取以形成回波信号。 自适应滤波器被配置为接收远端语音信号作为训练信号以模拟回波路径,并且消除近端信号中的回波信号。 语音信号检测部被配置为检测通信状态,根据通信状态来控制自适应滤波器,并且根据通信状态来控制路径变化检测部的启动。 路径变化检测部被配置为检测在回波路径上是否发生变化,并且根据在回波路径上是否发生变化来控制自适应滤波器。
    • 2. 发明申请
    • ECHO CANCELLER AND ECHO CANCELLATION METHOD
    • ECHO CANCELLER和ECHO CANCELLATION方法
    • US20140329568A1
    • 2014-11-06
    • US14368953
    • 2012-03-15
    • Tao XueTao SunDongmei LiuJinjun WangQi ZhangXia Wang
    • Tao XueTao SunDongmei LiuJinjun WangQi ZhangXia Wang
    • H04M9/08G10K11/16
    • H04M9/082G10K11/16
    • An echo canceller and an echo cancellation method are provided. The echo canceller includes a self-adaptive filter, a voice signal detection portion and a path change detection portion; a far-end voice signal is propagated in an echo path through a speaker and is picked up by a microphone to form an echo signal. The self-adaptive filter is configured to receive the far-end voice signal as a training signal to simulate the echo path, and cancel the echo signal in a near-end signal. The voice signal detection portion is configured to detect a communication status, control the self-adaptive filter according to the communication status, and control startup of the path change detection portion according to the communication status. The path change detection portion is configured to detect whether a change occurs on the echo path, and control the self-adaptive filter according to whether the change occurs on the echo path.
    • 提供回声消除器和回声消除方法。 回波消除器包括自适应滤波器,语音信号检测部分和路径变化检测部分; 远端语音信号通过扬声器在回波路径中传播,并由麦克风拾取以形成回波信号。 自适应滤波器被配置为接收远端语音信号作为训练信号以模拟回波路径,并且消除近端信号中的回波信号。 语音信号检测部被配置为检测通信状态,根据通信状态来控制自适应滤波器,并且根据通信状态来控制路径变化检测部的启动。 路径变化检测部被配置为检测在回波路径上是否发生变化,并且根据在回波路径上是否发生变化来控制自适应滤波器。