Reusing Data During Speech Pauses in an NLMS-based Acoustic Echo Canceller

Author

Lindstrom, Fredric ; Schüldt, Christian ; Claesson, Ingvar

Author_Institution

Konftel AB R&D, Umea

fYear

2006

fDate

14-17 Nov. 2006

Firstpage

1

Lastpage

4

Abstract

Fast convergence of the adaptive filter in an acoustic echo cancellation based hands-free communication system is desirable as it implies more periods of possible full-duplex communication. This paper presents a normalized least mean square (NLMS)-based algorithm, targeted for acoustic echo cancellation based units equipped with large external memory. The proposed algorithm utilizes unused processing resources in periods of silence, thus no extra complexity as compared with the conventional NLMS algorithm is required. The improvements obtained by the proposed algorithm are verified through simulated, as well as through real acoustic systems

Keywords

acoustic signal processing; adaptive filters; echo suppression; least mean squares methods; speech; NLMS-based algorithm; acoustic echo cancellation; adaptive filter; full-duplex communication; hands-free communication system; normalized least mean square; speech; Adaptive filters; Convergence; Echo cancellers; Finite impulse response filter; Helium; Least squares approximation; Loudspeakers; Microphone arrays; Signal processing algorithms; Speech;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2006. 2006 IEEE Region 10 Conference

Conference_Location

Hong Kong

Print_ISBN

1-4244-0548-3

Electronic_ISBN

1-4244-0549-1

Type

conf

DOI

10.1109/TENCON.2006.344053

Filename

4142206