公开(公告)号：US20130216057A1

公开(公告)日：2013-08-22

申请号：US13720672

申请日：2012-12-19

Applicant: Broadcom Corporation

Inventor： Jes Thyssen ,  Huaiyu Zeng ,  Nelson Sollenberger ,  Juin-Hwey Chen

IPC: H04M9/08

CPC classification number: H04M9/082

Abstract: A system that utilizes closed-form solutions to perform echo cancellation is described. The system includes a filter, filter parameter determination logic and a combiner. The filter is configured to process a far-end audio signal in accordance with one or more filter parameters to generate an estimated echo signal. The filter parameter determination logic is configured to update estimated statistics associated with the far-end audio signal and a microphone signal based on instantaneous statistics associated with the far-end audio signal and the microphone signal, and calculate the one or more filter parameters based upon the updated estimated statistics. The combiner is configured to generate an estimated near-end audio signal by subtracting the estimated echo signal from the microphone signal.

Abstract translation: 描述了利用闭式解决方案来执行回波消除的系统。 该系统包括滤波器，滤波器参数确定逻辑和组合器。 滤波器被配置为根据一个或多个滤波器参数处理远端音频信号以产生估计回波信号。 滤波器参数确定逻辑被配置为基于与远端音频信号和麦克风信号相关联的瞬时统计信息来更新与远端音频信号相关联的估计统计量和麦克风信号，并且基于以下方式计算一个或多个滤波器参数 更新的估计统计数据。 组合器被配置为通过从麦克风信号中减去估计的回波信号来产生估计的近端音频信号。