公开(公告)号：US09288578B2

公开(公告)日：2016-03-15

申请号：US14061671

申请日：2013-10-23

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Hyun Woo Kim ,  Do Young Kim ,  Woojik Chun

IPC: H04R3/02 ,  H04M9/08

CPC classification number: H04R3/02 ,  H04M9/082 ,  H04R2430/03

Abstract: An apparatus for canceling an acoustic echo signal caused by a far-end talker signal is provided. The apparatus for canceling an acoustic echo signal includes: a variance estimating unit configured to estimate a variance of a first audio signal of a near-end talker signal and a first noise signal of the near-end talker signal; a step size determining unit configured to determine a step size by using the variance of the first audio signal and the variance of the first noise signal; an adaptive filter coefficient updating unit configured to update an adaptive filter coefficient of an adaptive filter by using the step size; and an acoustic echo canceling unit configured to estimate an acoustic echo signal by using the adaptive filter coefficient, and cancel the acoustic echo signal from a microphone input signal by using the estimated acoustic echo signal.

Abstract translation: 提供一种用于消除由远端讲话者信号引起的声学回波信号的装置。 用于消除声学回波信号的装置包括：方差估计单元，被配置为估计近端讲话者信号的第一音频信号和近端讲话者信号的第一噪声信号的方差; 步长确定单元，被配置为通过使用第一音频信号的方差和第一噪声信号的方差来确定步长; 自适应滤波器系数更新单元，被配置为通过使用所述步长来更新自适应滤波器的自适应滤波器系数; 以及声学回声消除单元，被配置为通过使用自适应滤波器系数来估计声学回波信号，并且通过使用估计的声学回波信号来消除来自麦克风输入信号的声学回波信号。