Sub-band IIR acoustic echo canceller

Author

Sarghini, Stefano ; Uncini, Aurelio ; Piazza, Francesco

Author_Institution

Dipt. di Elettronica e Autom., Ancona Univ., Italy

Volume

3

fYear

1996

fDate

13-16 May 1996

Firstpage

1678

Abstract

In teleconferencing systems the echo can be very long. A direct FIR implementation of the echo canceller often requires more than 2000 taps. One approach is to process the signal in sub-bands providing a separate FIR echo canceller for each band. We propose the use of an IIR filter in each sub-band adapted by a variant of the Steiglitz-McBride identification scheme instead of the classical adaptive FIR filters. Experimental results and computer simulations show that the proposed IIR sub-band echo canceller performs better then the equivalent FIR counterpart

Keywords

IIR filters; echo suppression; filtering theory; identification; teleconferencing; FIR echo canceller; FIR suband acoustic echo canceller; IIR filter; IIR subband echo canceller; Steiglitz-McBride identification; computer simulations; experimental results; subband IIR acoustic echo canceller; subband signal processing; teleconferencing systems; Adaptive algorithm; Adaptive filters; Computer simulation; Echo cancellers; Equations; Finite impulse response filter; IIR filters; Least squares approximation; Polynomials; Teleconferencing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnical Conference, 1996. MELECON '96., 8th Mediterranean

Conference_Location

Bari

Print_ISBN

0-7803-3109-5

Type

conf

DOI

10.1109/MELCON.1996.551277

Filename

551277