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Convention Paper

General Purpose Direct Form 1 IIR Filter Structure for Digital Audio Applications

Authors: Greenfield, Richard G.

AES Convention 103 · Paper 4534 · September 1997

Abstract

The DF1 IIR filter structure is the most common structure employed in audio applications. A limiting factor associated with the DF1 structure is the non-linear distribution of the pole/zero locations in the 'z' domain after coefficient quantization. This paper proposes the application of dither to double precision coefficients which permits double precision performance to be achieved with single precision arithmetic. This realization provides a versatile wide band DF1 realization suitable for most audio applications.

Details

Published in
AES Convention 103
AES Convention
103
Paper number
4534
Publication date
September 6, 1997
Session subject
Signal Processing and Conversion
Affiliation
University of Essex, Colchester, Essex, UK (See document for exact affiliation information.)
Type
Convention Paper