Invention Grant
- Patent Title: Echo canceller and a method thereof
- Patent Title (中): 回波消除器及其方法
-
Application No.: US13641967Application Date: 2010-04-22
-
Publication No.: US08983058B2Publication Date: 2015-03-17
- Inventor: Anders Eriksson , Per Ahgren
- Applicant: Anders Eriksson , Per Ahgren
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (publ)
- Current Assignee Address: SE Stockholm
- Agency: Rothwell, Figg, Ernst & Manbeck P.C.
- International Application: PCT/SE2010/050441 WO 20100422
- International Announcement: WO2011/133075 WO 20111027
- Main IPC: H04M9/08
- IPC: H04M9/08 ; H04B3/23 ; H03H21/00

Abstract:
The present invention relates to an echo canceller (300) for estimating a model of an echo signal and a method thereof. The echo canceller comprises at least an adaptive main filter (301) for modeling the echo signal and an adaptive shadow filter (302) for modeling the echo signal. The adaptive main filter is an adaptive filter for which the adaptation speed is proportional to a system noise estimate and the adaptation speed of the shadow filter (302) is faster than the adaptation speed of the adaptive main filter (301). The echo canceller (300) comprises a processor (303) for determining whether the adaptive shadow filter models the echo signal better than the adaptive main filter and an updater (304) for updating the system noise estimate of the adaptive main filter (301) if the adaptive shadow filter models (302) the echo signal better than the adaptive main filter (301).
Public/Granted literature
- US20130044872A1 ECHO CANCELLER AND A METHOD THEREOF Public/Granted day:2013-02-21
Information query