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Dr.-Ing. Friedemann Köster
- © Q&U
Research Field
- Quality of Speech and Audio
- Speech- and Signal Processing
Research Topics
- Multidimensional Diagnostic Analysis of Conversational Speech Quality
Biography
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.
Projects
- Subjektive Messung und instrumentelle Schätzung von Sprachqualität in einer Konversationssituation auf Basis von perzeptiven Dimensionen
- User-Friendly Estimation of Speech Quality for Telecommunications and
Network Carriers (UFESQ)
Teaching
Address:
Quality and Usability Lab
Deutsche Telekom Laboratories
TU Berlin
Ernst-Reuter-Platz 7
D-10587 Berlin, Germany
Telefon:
+49 30 8353 58255
+49 151 14745202
Publications
| Zitatschlüssel | moeller2013g |
|---|---|
| Autor | Möller, Sebastian and Köster, Friedemann and Skowronek, Janto and Schiffner, Falk |
| Buchtitel | Proc. 4th International Workshop on Perceptual Quality of Systems (PQS 2013) |
| Seiten | 30–35 |
| Jahr | 2013 |
| ISBN | 978-0470012352 |
| Ort | Vienna, Austria |
| Adresse | Vienna, Austria |
| Monat | 2-4 Septemner |
| Herausgeber | Schatz, R. and Hoßfeld, Tobias |
| Wie herausgegeben | full |
| Organisation | FTW |
| Zusammenfassung | We present an analysis of technical causes and corresponding perceptual dimensions of the quality of transmitted speech. Four experts annotated speech files of a common database according to a methodology which is currently being discussed for the future ITU-T Recommendation P.TCA. The annotations are analyzed with respect to their frequency and consistency, and compared to overall quality values as well as perceptual dimension scores, obtained either from subjective experiments or from instrumental models. This way, links can be drawn between technical causes and perceptual dimensions in diagnostic quality assessment of transmitted speech, and the proposed procedures of several upcoming ITU-T Recommendations can be initially validated. |