公开(公告)号：US08989815B2

公开(公告)日：2015-03-24

申请号：US13684526

申请日：2012-11-24

Applicant: Polycom, Inc.

Inventor： Kwan K. Truong ,  Peter Chu ,  Steve Potts ,  Erwin Goesnar

IPC: H04M1/00 ,  H04B1/38 ,  H04M9/08

CPC classification number: H04M9/085

Abstract: Noise suppression systems and methods suppress far field noise in a microphone signal. A telephony system includes a main microphone and a reference microphone. In one example, the main microphone and the reference microphone can be located in the same device. In another example, the main microphone and the reference microphone can be located in two separate devices. A DSP can use the reference microphone signal to carry out suppression of far field noise in the main microphone signal. In one approach the DSP can determine an estimate of far field noise in the main microphone signal based on a noise estimate of the reference microphone signal and a reference and main microphone coupling estimate, and then subtract the far field noise estimate from the main microphone signal. Alternatively, the DSP can suppress the main microphone signal if it determines that a local talker is inactive.

Abstract translation: 噪声抑制系统和方法抑制麦克风信号中的远场噪声。 电话系统包括主麦克风和参考麦克风。 在一个示例中，主麦克风和参考麦克风可以位于同一设备中。 在另一示例中，主麦克风和参考麦克风可以位于两个单独的设备中。 DSP可以使用参考麦克风信号来对主麦克风信号中的远场噪声进行抑制。 在一种方法中，DSP可以基于参考麦克风信号和参考和主麦克风耦合估计的噪声估计来确定主麦克风信号中的远场噪声的估计，然后从主麦克风信号中减去远场噪声估计 。 或者，如果确定本地讲话者不活动，则DSP可以抑制主麦克风信号。

公开(公告)号：US20140148224A1

公开(公告)日：2014-05-29

申请号：US13684526

申请日：2012-11-24

Applicant: Polycom, Inc.

Inventor： Kwan K. Truong ,  Peter Chu ,  Steve Potts ,  Erwin Goesnar

IPC: H04M9/08

CPC classification number: H04M9/085

Abstract: Noise suppression systems and methods suppress far field noise in a microphone signal. A telephony system includes a main microphone and a reference microphone. In one example, the main microphone and the reference microphone can be located in the same device. In another example, the main microphone and the reference microphone can be located in two separate devices. A DSP can use the reference microphone signal to carry out suppression of far field noise in the main microphone signal. In one approach the DSP can determine an estimate of far field noise in the main microphone signal based on a noise estimate of the reference microphone signal and a reference and main microphone coupling estimate, and then subtract the far field noise estimate from the main microphone signal. Alternatively, the DSP can suppress the main microphone signal if it determines that a local talker is inactive.

Abstract translation: 噪声抑制系统和方法抑制麦克风信号中的远场噪声。 电话系统包括主麦克风和参考麦克风。 在一个示例中，主麦克风和参考麦克风可以位于同一设备中。 在另一示例中，主麦克风和参考麦克风可以位于两个单独的设备中。 DSP可以使用参考麦克风信号来对主麦克风信号中的远场噪声进行抑制。 在一种方法中，DSP可以基于参考麦克风信号和参考和主麦克风耦合估计的噪声估计来确定主麦克风信号中的远场噪声的估计，然后从主麦克风信号中减去远场噪声估计 。 或者，如果确定本地讲话者不活动，则DSP可以抑制主麦克风信号。