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Journal Article

Describing Telephone Speech Codec Quality Degradations by Means of Impairment Factors

Authors: Möller, Sebastian; Berger, Jens

Journal of the Audio Engineering Society · Volume 50 · Issue 9 · pp. 667–680 · September 2002

Abstract

The equipment impairment factor methodology adopted by the ITU-T for describing perceptual quality degradations associated with nonwaveform telephone speech codecs is discussed with regard to other degradations of the transmission channel. A new algorithm allows such factors to be calculated from the results of auditory tests, and first steps toward a derivation by means of instrumental models are presented. Limitations of the current approach for codec tandems are pointed out.

Details

Publication
Journal of the Audio Engineering Society
Volume
50
Issue
9
Pages
667–680
Publication date
September 6, 2002
Affiliation
Institut für Kommunikationsakustik (IKA), Ruhr-Universität Bochum, Bochum, Germany ; T-Systems Nova GmbH Berkom,Berlin, Germany (See document for exact affiliation information.)
Type
Journal Article