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Conference Paper

Filter Topologies

Authors: Wilson, Rhonda

AES Conference: UK 7th Conference: Digital Signal Processing (DSP) · Paper DSP-09 · September 1992

Abstract

This paper concentrates on the implementation of recursive filters using fixed-point 2's-complement arithmetic for high-fidelity audio. It is now widely accepted that 16/32-bit DSP chips are inadequate for many audio applications. The engineer new to the design and realization of recursive filters may believe that the straightforward use of 24/48 (+overflow)-bit DSP chips will ensure sufficient quality for audio applications. Unfortunately this is not always the case. Filter topologies based on direct form I are recommended for audio. Many filter designs require the use of error-feedback schemes to reduce noise to an acceptable level. Some extremely critical frequency-response designs require the use of double-precision coefficients. Sometimes it is appropriate to use other filter topologies to reduce the noise floor or allow the implementation of extremely critical frequency response designs.

Details

Published in
AES Conference: UK 7th Conference: Digital Signal Processing (DSP)
Paper number
DSP-09
Publication date
September 6, 1992
Session subject
Digital Signal Processing
Affiliation
Meridian Audio Ltd., Huntingdon, UK (See document for exact affiliation information.)
Type
Conference Paper