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Seminar at Speech, Music and Hearing:

On in-service perceptual speech quality monitoring in cellular radio systems

Hans-Jürgen Zepernick, Blekinge Tekniska Högskola

Abstract

A method for in-service monitoring of the end-user perceptual speech quality in cellular radio systems is proposed. This method incorporates the perceptual evaluation of speech quality (PESQ) algorithm to monitor the quality experienced by the end-user. Here, the monitoring is carried out at the transmitting side. In this case, the speech signal received by the end-user is estimated at the transmitter in accordance with a feedback signal. The performance of the proposed scheme has been investigated through extensive simulations for the Universal Mobile Telecommunication System (UMTS) using different speech coding rates and channel conditions. The results indicate that the proposed scheme can predict end-user quality with a root-mean-squared error (RMSE) of at most 0.15 using the mean opinion score (MOS) rating scheme. Such accuracy can be beneficial in applications such as radio resource management for satisfying the desired level of quality of service.

Biography

Hans-Jürgen Zepernick received the Dipl.-Ing. degree in electrical engineering from the University of Siegen, Germany, in 1987 and the Dr.-Ing. degree from the University of Hagen, Germany, in 1994. From 1987 to 1989, he was with the Radio and Radar Department of Siemens AG, Munich, Germany. He is currently a Professor and the Chair of radio communications at the School of Engineering of the Blekinge Institute of Technology (BTH), Karlskrona, Sweden. Prior to this appointment at BTH in October 2004, he held the positions of Professor of wireless communications at Curtin University of Technology, Perth, Australia; Deputy Director of the Australian Telecommunications Research Institute (ATRI); and Associate Director of the Australian Telecommunications Cooperative Research Centre (ATcrc). He was the Leader of the ATcrc´s wireless program and the Leader of the center´s radio transmission technology project. He served on the Board of Management of ATRI and the Executive Research Committee of the ATcrc. He has been an active participant in the European FP7 Network of Excellence EuroNF contributing to work packages on user-perceived quality of service. Dr. Zepernick is an author or coauthor of some 180 technical papers and five book chapters in the areas of wireless and radio communications. He is also the lead author of the textbook entitled Pseudo Random Signal Processing: Theory and Application (Wiley, 2005). His research interests include radio channel characterization and modeling, radio transmission technologies, radio access techniques, mobile multimedia communications, and perceptual quality assessment of mobile multimedia services.

15:15 - 17:00
Friday February 11, 2011

The seminar is held in Fantum.

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Last updated: Wednesday, 23-Jun-2010 09:22:46 MEST