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Convention Paper

Perception of Phase Distortion in Anti-Alias Filters

Authors: Preis, Douglas; Bloom, P. J.

AES Convention 74 · Paper 2008 · October 1983

Abstract

Experimental results on the audibility of phase distortion produced by minimum-phase 4kHz and 15 kHz anti-alias filters are reported. Numerous impulse response pairs with identical spectral magnitudes but linear-phase and minimum-phase responses were compared by five test subjects who listened diotically (same signal at both ears) on earphones. Group-delay distortion was doubled, progressively, until at least 67% mean correct discrimination was attained. At 4kHz, the phase distortion introduced by a cascade of two eighth-order Butterworth filter pairs was audible as was that from only a single pair of seventh-order elliptic filters. At 15 kHz, the cascade of up to four pairs of seventh-order elliptic filters introduced no perceptible effects. Experimental details and several representative filter frequency and transient responses are included.

Details

Published in
AES Convention 74
AES Convention
74
Paper number
2008
Publication date
October 6, 1983
Session subject
Psychoacoustics and Subjective Testing
Affiliation
Tufts University, Medford, MA ; Polytechnic of Central London, London, England (See document for exact affiliation information.)
Type
Convention Paper