公开(公告)号：US20080161068A1

公开(公告)日：2008-07-03

申请号：US11896468

申请日：2007-08-31

Applicant: Tong-Chuan Pang ,  Cao Xu ,  Xiu-Mei Zhai ,  Jing-Jing Meng ,  Xin-Yi Wang ,  Xin Wang

Inventor： Tong-Chuan Pang ,  Cao Xu ,  Xiu-Mei Zhai ,  Jing-Jing Meng ,  Xin-Yi Wang ,  Xin Wang

IPC: H04B1/38

CPC classification number: H04M9/082

Abstract: This invention provides a device, method and system for implementing an echo control on hand-free phones, including an echo eliminator as a primary component. The method in use is listed as follows.First of all, local speech signals on a sending channel as well as remote speech signals on a receiving channel are sampled. Then call status of a current network is determined based on energy of the obtained remote and local speech signals samples. Finally, a corresponding echo control treatment to the speech signals traveling through the sending channel according to the resulting call status is given. As a result, the echo in a digital hand-free communication system can be efficiently eliminated.

Abstract translation: 本发明提供了一种用于在免提电话上实现回波控制的装置，方法和系统，包括回波消除器作为主要部件。 使用的方法如下。 首先，对发送信道上的本地语音信号以及接收信道上的远程语音信号进行采样。 然后根据获得的远程和本地语音信号样本的能量来确定当前网络的呼叫状态。 最后，给出了根据所得到的呼叫状态对通过发送信道行进的语音信号的对应的回声控制处理。 结果，可以有效地消除数字无人通信系统中的回波。