Integral and Diagnostic Intrusive Prediction of Speech Quality
This work deals with the instrumental measurement methods for the perceived quality of transmitted speech. These measures simulate the speech perception process employed by human subjects during auditory experiments. The measure standardized by the Intern
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Series Editors Sebastian Möller, TU Berlin and Deutsche Telekom Laboratories, Berlin, Germany Axel Küpper, TU Berlin and Deutsche Telekom Laboratories, Berlin, Germany Alexander Raake, TU Berlin and Deutsche Telekom Laboratories, Berlin, Germany
For further volumes: http://www.springer.com/series/10013
Nicolas Côté
Integral and Diagnostic Intrusive Prediction of Speech Quality
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Nicolas Côté Centre Européen de Réalité Virtuelle Université de Bretagne Occidentale 25 rue Claude Chappe 29280 Plouzané France e-mail: [email protected]
ISSN 2192-2810
e-ISSN 2192-2829
ISBN 978-3-642-18462-8
e-ISBN 978-3-642-18463-5
DOI 10.1007/978-3-642-18463-5 Springer Heidelberg Dordrecht London New York Ó Springer-Verlag Berlin Heidelberg 2011 This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer. Violations are liable to prosecution under the German Copyright Law. The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use. Cover design: eStudio Calamar, Berlin/Figueres Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)
To my partner, Natacha
Preface
The telephony network broadly changed during the last decades with the intensive introduction of Voice over Internet Protocol (VoIP) technology and third generation mobile networks. These networks enable new transmission paradigms that affect the perceived quality of speech signals. The perceived characteristics of a speech signal transmitted by a VoIP network differ from the characteristics of a speech signal transmitted by a traditional analog telephony network: new impairments are introduced (e.g. packet losses), or traditional ones are exacerbated (e.g. echo). However, enhancements have been also introduced in VoIP and new mobile networks. For instance, WideBand (WB) and Super-WideBand (S-WB) transmissions both significantly improve speech quality. In this book, instrumental measurement methods for the perceived quality of transmitted speech are described. Such methods simulate the speech perception process employed by human subjects during auditory experiments. The measure standardized by the International Telecommunication Union (ITU), called “WidebandPerceptual Evaluation of Speech Quality” or WB-PESQ, is not able to quantify all of these perceived characteristics on a unidimensional quality scale, the Mean Opinion Score (MOS) scale. Recent experimental
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