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Finite-precision design and implementation of all-pass polyphase networks for echo cancellation in sub-bands

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conference contribution
posted on 26.01.2010, 15:09 authored by Oguz Tanrikulu, Buyurman Baykal, A.G. Constantinides, Jonathon Chambers, P.A. Naylor
All-pass polyphase networks (APN) are particularly attractive for acoustical echo cancellation (AEC) arranged in sub-bands. They provide lower inter-band aliasing, delay and computational complexity than their FIR counterparts. Moreover, APNs achieve higher echo return loss enhancement (ERLE) performance and faster convergence than full-band processing. In the paper, the finite precision implementation of APNs is addressed. A procedure is presented for re-optimising the all-pass coefficients of the prototype low-pass filter for finite precision operation. Robust finite precision implementation of a prototype low-pass filter is discussed. The results of a set of AEC experiments are reported with full and 16-bit precision implementation

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Citation

TANRIKULU, O. ... et al, 1995. Finite-precision design and implementation of all-pass polyphase networks for echo cancellation in sub-bands. IN: IEEE International Conference on Acoustics, Speech, and Signal Processing, 9-12 May, Volume 5, pp. 3039 - 3042

Publisher

© IEEE

Version

VoR (Version of Record)

Publication date

1995

Notes

This is a conference paper [© IEEE]. It is also available from: http://ieeexplore.ieee.org/servlet/opac?punumber=3469. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

ISBN

0780324315

ISSN

1520-6149

Language

en