TU Berlin

Quality and Usability LabFriedemann Köster

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Dr.-Ing. Friedemann Köster


Research Field
- Quality of Speech and Audio
- Speech- and Signal Processing 

Research Topics
- Multidimensional Diagnostic Analysis of Conversational Speech Quality

Friedemann Köster studied Industrial Engineering at the Christian-Albrechts-University of Kiel. In 2012 he finished his studies and received his Dipl.-Wirtsch.-Ing. degree. Currently he is working as a research assistant at the Quality and Usability Lab of Deutsche Telekom Laboratories, TU-Berlin, where he also works towards a Phd degree in the field of quality.



Speech Communication

Quality and Usability Lab
Deutsche Telekom Laboratories
TU Berlin
Ernst-Reuter-Platz 7
D-10587 Berlin, Germany


+49 30 8353 58255
+49 151 14745202


P.TCA GUI and naive annotators experiment
Zitatschlüssel koester2014d
Autor Köster, Friedemann and Möller, Sebastian and Skowronek, Janto
Jahr 2014
Adresse Geneva
Nummer COM 12 – C 196 – E
Monat sep
Institution International Telecommunication Union
Zusammenfassung In this contribution, we present a graphical-user-interface for the annotation process of the P.TCA schema. Using available exemplary listening material, an annotation experiment following the P.TCA guidelines was conducted with na"ive listeners. The annotations are analysed with respect to their frequency and accuracy in comparison to expert listeners. Further findings about the improvement of the P.TCA methodology are presented.
Typ der Publikation ITU-T Contribution
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