公开(公告)号：US08983057B1

公开(公告)日：2015-03-17

申请号：US14033253

申请日：2013-09-20

Applicant: Amazon Technologies, Inc.

Inventor： Hongyang Deng ,  Amit Singh Chhetri

IPC: H04M9/08

CPC classification number: H04M9/082

Abstract: A step size controller may be used to control the rate of adaptation in an acoustic echo canceller. Step size control based on the values of adaptive coefficients (rather than, e.g., a fixed initial adaptation period) provides improved reliability and resistance to disruption. Accordingly, features are disclosed for controlling step size based on the values of adaptive coefficients.

Abstract translation: 可以使用步长控制器来控制声学回声消除器中的适应速率。 基于自适应系数的值（而不是例如固定的初始适应周期）的步长控制提供了改进的可靠性和抵抗中断的能力。 因此，公开了基于自适应系数的值来控制步长的特征。

公开(公告)号：US09185506B1

公开(公告)日：2015-11-10

申请号：US14108121

申请日：2013-12-16

Applicant: Amazon Technologies, Inc.

Inventor： Hongyang Deng

IPC: H04B3/20 ,  H04R3/02 ,  G10L21/02 ,  H04R29/00 ,  G10K11/175 ,  H04B3/23 ,  H04M9/08 ,  G10L21/0208

CPC classification number: G10K11/175 ,  G10L21/02 ,  G10L21/0208 ,  G10L2021/02082 ,  H04B3/23 ,  H04M9/08 ,  H04M9/082 ,  H04R29/004

Abstract: Features are disclosed for generating comfort noise that matches a frequency spectrum of original background noise. For example, a spectral shape of an estimated noise component can be determined. A frame of white noise can be modified based at least in part on the spectral shape of the noise component. The modified frame of white noise can be converted to a time-domain noise signal. The level of the time-domain noise signal can be adjusted to match an original level of the noise after noise reduction. Residual echo suppression can sometimes cause background noise to be eliminated, causing silence. The adjusted time-domain noise signal can be added after residual echo suppression to maintain continuity of background noise levels.

Abstract translation: 公开了用于产生与原始背景噪声的频谱匹配的舒适噪声的特征。 例如，可以确定估计噪声分量的频谱形状。 可以至少部分地基于噪声分量的光谱形状来修改白噪声的帧。 修改后的白噪声帧可以转换为时域噪声信号。 可以调节时域噪声信号的电平，使其与噪声降低后的噪声原始电平相匹配。 残余回波抑制有时会导致背景噪声被消除，导致沉默。 调整后的时域噪声信号可以在残留回波抑制后加上，以保持背景噪声电平的连续性。