ECHO POSITION DECISION AND DOUBLE TALK DETECTION OF SUB-BAND IN COMMUNICATION SYSTEM,申请号JP20070230414-传众专利搜索

ECHO POSITION DECISION AND DOUBLE TALK DETECTION OF SUB-BAND IN COMMUNICATION SYSTEM

申请公布号：JP2007329971(A)

申请号：JP20070230414

申请日期：2007.09.05

申请公布日期：2007.12.20

申请人：

ZARLINK SEMICONDUCTOR INC

发明人：SEIBERT MICHAEL

分类号：H04B3/23;H04R3/02

主分类号：H04B3/23

摘要：PROBLEM TO BE SOLVED: To disclose a method and an apparatus for controlling echo canceller in a communication channel with a very small amount of calculation. SOLUTION: In the method and the apparatus for controlling the echo canceller in the communication channel, an input signal from the communication channel is made to be a sub-band by a decimeter 14 and a sub-band filter 16. An echo position within the sub-band is identified by an echo position deciding unit 12 and a peak detecting unit 20, and is used for controlling the echo canceller. Typically, the echo canceller is a full band echo canceller having an adaptive filter, and an identification echo position is used for controlling the filter coefficient. COPYRIGHT: (C)2008,JPO&INPIT