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Title: Finite-precision design and implementation of all-pass polyphase networks for echo cancellation in sub-bands
Authors: Tanrikulu, Oguz
Baykal, Buyurman
Constantinides, A.G.
Chambers, Jonathon
Naylor, P.A.
Keywords: IIR filters
Acoustic signal processing
All-pass filters
Antialiasing
Computational complexity
Convergence of numerical methods
Delays
Digital filters
Echo suppression
Low-pass filters
Issue Date: 1995
Publisher: © IEEE
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
Abstract: 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
Description: 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.
Version: Published
DOI: 10.1109/ICASSP.1995.479486
URI: https://dspace.lboro.ac.uk/2134/5866
ISBN: 0780324315
ISSN: 1520-6149
Appears in Collections:Conference Papers and Contributions (Electronic, Electrical and Systems Engineering)

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