公开(公告)号：US07894598B2

公开(公告)日：2011-02-22

申请号：US11012079

申请日：2004-12-14

申请人： Gerhard Uwe Schmidt ,  Tim Haulick ,  Clarence Chu ,  David Giesbrecht

发明人： Gerhard Uwe Schmidt ,  Tim Haulick ,  Clarence Chu ,  David Giesbrecht

IPC分类号： H04M9/08

CPC分类号： H04M9/082

摘要： A system for limiting a received audio signal in a communication system is provided. The receive audio signal is limited prior to being played over a loudspeaker to insure that the loudspeaker output will not be clipped when picked up by a nearby microphone associated with the communication system. By preventing clipping of the loudspeaker output at the microphone, the transfer function of the loudspeaker-enclosure-microphone system remains linear, facilitating accurate echo cancellation in the communication system.

摘要翻译： 提供了一种用于限制通信系统中接收到的音频信号的系统。 接收音频信号在通过扬声器播放之前受到限制，以确保当与通信系统相关联的附近的麦克风拾取时扬声器输出将不被削波。 通过防止麦克风上的扬声器输出的削波，扬声器 - 麦克风系统的传输功能保持线性，便于在通信系统中进行精确的回波消除。

公开(公告)号：US20060126822A1

公开(公告)日：2006-06-15

申请号：US11012079

申请日：2004-12-14

申请人： Gerhard Schmidt ,  Tim Haulick ,  Clarence Chu ,  David Giesbrecht

发明人： Gerhard Schmidt ,  Tim Haulick ,  Clarence Chu ,  David Giesbrecht

IPC分类号： H04M9/08

CPC分类号： H04M9/082

摘要： A system for limiting a received audio signal in a communication system is provided. The receive audio signal is limited prior to being played over a loudspeaker to insure that the loudspeaker output will not be clipped when picked up by a nearby microphone associated with the communication system. By preventing clipping of the loudspeaker output at the microphone, the transfer function of the loudspeaker-enclosure-microphone system remains linear, facilitating accurate echo cancellation in the communication system.

摘要翻译： 提供了一种用于限制通信系统中接收到的音频信号的系统。 接收音频信号在通过扬声器播放之前受到限制，以确保当与通信系统相关联的附近的麦克风拾取时扬声器输出将不被削波。 通过防止麦克风上的扬声器输出的削波，扬声器 - 麦克风系统的传输功能保持线性，便于在通信系统中进行精确的回波消除。