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TU Berlin

Inhalt des Dokuments

Benjamin Belmudez


Research Field

Audiovisual quality

Research Topics

Multimodal Quality Assessment on Videoconferencing


Benjamin was born in France in 1983. He first studied general Mathematics and Physics in Toulouse. Then he joined the National School of Higher Education in Physics of Strasbourg (Engineering school) and specialized in Video and Image Processing. He carried out his master's degree within the INRIA in cooperation with the LIAMA (Beijing) on "Structural Change Detectection on Satellite Images using Conditional Mixed States Markovian Model". In 2007, he started a Phd within the Deutsche Telekom Laboratories and the Technical University of  Berlin.

Address Quality and Usability Lab
Deutsche Telekom Laboratories
TU Berlin
Ernst-Reuter-Platz 7
D-10587 Berlin, Germany Tel:  +49 30 8353 58233


Contributions to Teaching

  • Exercises “Usability Engineering”, Technical University Berlin, 2008-2009


On the Way to High-Quality Video Calls in Future Mobile Networks
Zitatschlüssel lewcio2011a
Autor Lewcio, Blazej and Belmudez, Benjamin and Enghardt, T. and Möller, Sebastian
Buchtitel Third International Workshop on Quality of Multimedia Experience (QoMEX'11)
Seiten 43–48
Jahr 2011
ISBN 978-1-4577-1333-0
DOI 10.1109/QoMEX.2011.6065710
Ort Mechelen, Belgium
Adresse Mechelen, Belgium
Monat sep
Verlag IEEE
Wie herausgegeben full
Zusammenfassung Seamless use of video telephony in future mobile communication systems creates new challenges for high-quality provisioning. Terminal mobility and dynamically changing network properties will affect the quality of the Internet connection and consequently will impair the Quality of Experience (QoE) of mobile users. To ensure best connected video calls, cross-layer adaptation of the audiovisual transmission to the network circumstances will be required. To successfully adapt the transmission parameters, knowledge about the user perception during mobile video calls is required. This paper addresses this issue and presents a study of quality experience during selected periods of emulated video calls. Perception of dynamic phenomena, such as roaming between network technologies, switching the video and speech codecs, and changing the video bit rate during active calls are in scope of the investigation. The QoE of the analysed material is linked to the underlying transmission properties, which allows to select proper strategies of QoE adaptation during mobile video calls in future wireless networks.
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