Characteristics of acoustic echo cancellers using sub-band sampling and decorrelation methods

4 August 1988

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 24 (16) , 1039-1040
https://doi.org/10.1049/el:19880707

Abstract

An acoustic sub-band echo canceller offering high speech quality has been implemented. Echo cancellation in excess of 40 dB was obtained over the 7 kHz frequency band in the hardware with 4000-tap FIR filters. It was confirmed using a decorrelation algorithm that the convergence speed for coloured signals was about three times faster than the conventional NLMS algorithm.

Keywords

NLMS ALGORITHM
SUB-BAND SAMPLING
DECORRELATION METHODS
DECORRELATION ALGORITHM
SPEECH QUALITY
CONVERGENCE SPEED
7 KHZ
4000-TAP FIR FILTERS
ACOUSTIC ECHO CANCELLERS

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