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Convention Paper

QESTRAL (Part 1): Quality Evaluation of Spatial Transmission and Reproduction Using an Artificial Listener

Authors: Rumsey, Francis; Zielinski, Slawomir; Jackson, Philip; Dewhirst, Martin; Conetta, Robert; George, Sunish; Bech, Søren; Meares, David

AES Convention 125 · Paper 7595 · October 2008

Abstract

Most current perceptual models for audio quality have so far tended to concentrate on the audibility of distortions and noises that mainly affect the timbre of reproduced sound. The QESTRAL model, however, is specifically designed to take account of distortions in the spatial domain such as changes in source location, width and envelopment. It is not aimed only at codec quality evaluation but at a wider range of spatial distortions that can arise in audio processing and reproduction systems. The model has been calibrated against a large database of listening tests designed to evaluate typical audio processes, comparing spatially degraded multichannel audio material against a reference. Using a range of relevant metrics and a sophisticated multivariate regression model, results are obtained that closely match those obtained in listening tests.

Details

Published in
AES Convention 125
AES Convention
125
Paper number
7595
Publication date
October 6, 2008
Session subject
Spatial Audio Quality
Affiliation
Institute of Sound Recording, University of Surrey; Bang & Olufsen A/S; DJM Consultancy (See document for exact affiliation information.)
Type
Convention Paper