Dr.-Ing. Christian Müller

Christian Müller is a Senior Researcher at the German Research Institute for Artificial Intelligence. From 2006 to 2008, he has been a visiting researcher at the International Computer Science Institute (ICSI) in Berkeley, California. During his stay at ICSI, he was able to acquire substantial post-doctoral experience in human language technology. He earned a Ph.D. in Computer Science at Saarland University in January 2006. His dissertation "Zweistufige kontextsensitive Sprecherklassifikation am Beispiel von Alter und Geschlecht" (Two-layered Context-Sensitive Speaker Classification on the Example of Age and Gender) was supervised by Prof. Wolfgang Wahlster and graded Magna Cum Laude. From 1994 to 2001, he studied Computational Linguistics at Saarland University where he graduated with distinction. He also holds an IT-Business Apprenticeship.

speech and human language technology in general; more specifically: speaker classification (age, gender, cognitive load, emotions, etc), speaker recognition, language recognition, acoustic event detection.

Christian Müller served as a member of the program committees of the following journals, conferences and workshops:

• the IEEE Transactions on Audio, Speech and Language Processing journal (as well as the latest special issue on speaker and language recognition)
• the ACM Speech Communication journal
• the Odyssey 2008 Speaker and Language Recognition Workshop
• the 10th European Conference on Speech Communication and Technology (Eurospeech/Interspeech 2007)
• the 32nd International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2007)
• the International Conference on Intelligent User Interfaces (IUI 2007)
• the IADIS International Conference on Interfaces and Human Computer Interaction (IHCI2007)
• the International workshop on Paralinguistic Speech in association with the 16th International Conference on Phonetic Sciences
• the workshop on Searching Spontaneous Conversational Speech at the 30th Annual International ACM SIGIR (Special Interest Group on Information Retrieval) Conference
• the ACM Workshop on Educational Multimedia and Multimedia Education (EMME 2007) in conjunction with ACM Multimedia 2007.

books

Müller, C.(ed.) (2007). Speaker Classification II - Selected Projects.Springer, New York - Berlin..


Müller, C.(ed.) (2007). Speaker Classification I - Fundamentals, Features, and Methods.Springer, New York - Berlin..


Müller, C. (2006). Zweistufige kontextsensitive Sprecherklassifikation am Beispiel von Alter und Geschlecht [Two-layered Context-Sensitive Speaker Classification on the Example of Age and Gender].Akademische Verlagsgesellschaft Aka, Berlin..


theses

Müller, C. (2005). Zweistufige kontextsensitive Sprecherklassifikation am Beispiel von Alter und Geschlecht [Two-layered Context-Sensitive Speaker Classification on the Example of Age and Gender]. Phd-thesis, Computer Science Institute, University of the Saarland, Germany.


Müller, C. (2001). Symptome von Zeitdruck und kognitiver Belastung in gesprochener Sprache: eine experimentelle Untersuchung [Symptoms of cognitive load and time pressure in spoken language: an experimental study]. Diploma thesis, Computational linguistics institute, University of the Saarland, Germany.


journal articles and book chapters

Jameson, A., Kiefer, J., Müller, C., Wittig, F., & Rummer, R. (2008). Assessment of a user's time pressure and cognitive load on the basis of features of speech. In M. Crocker & J. Siekmann (Hrsg.), "Resource-adaptive cognitive systems". Berlin: Springer.


G. Friedland, O. Vinyals, Y. Huang, C. Müller: Prosodic and other Long-Term Features for Speaker Diarization, accepted for IEEE Transactions on Audio, Speech, and Language Processing. 2009 (to appear)

conference and workshop contributions

Müller, C., Biel, J., Kim, E., and Rosario, D. (2008). Speech-overlapped Acoustic Event Detection for Automotive Applications. In Proceedings of the Interspeech 2008. Brisbane, Australia.


Müller, C. and Biel, J. (2008). The ICSI 2007 Language Recognition System. In Proceeedings of the Odyssey 2008 Workshop on Speaker and Language Recognition. Stellenbosch, South Africa.


Feld, M. and Müller, C. (2008). Speaker Classification for Mobile Devices. In Proceedings of the 2nd IEEE International Interdisciplinary Conference on Portable Information Devices (Portable 2008). Garmisch-Partenkirchen, Germany.


Müller, C. (2007). Classifying Speakers According to Age and Gender. In Speaker Classification II. Heidelberg - New York - Berlin: Springer.


Müller, C. and Burkhardt, F. (2007). Combining Short-term Cepstral and Long-term Prosodic Features for Automatic Recognition of Speaker Age. In Proceedings of the Interspeech 2007. Antwerp, Belgium.


Metze, F., Ajmera, J., Englert, R., Bub, U., Burkhardt, F., Stegmann, J., Müller, C., Huber, R., Andrassy, B., Bauer, J., and Littel, B. (2007). Comparison of Four Approaches to Age and Gender Recognition for Telephone Applications. In Proceedings of the 32nd International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2007). Honolulu, Hawaii.


Huang, Y., Vinyals, O., Friedland, G., Müller, C., Mirghafori, N., and Wooters, C. (2007). A Fast-Match Approach for Robust, faster than Real-Time Speaker Diarization. In Proceedings of the tenth biannual IEEE workshop on Automatic Speech Recognition and Understanding (ASRU 2007). Kyoto, Japan.


Stegmann, J., Burkhardt, F., Oberle, F., Eckert, M., Englert, R., and Müller, C. (2006). Einsatz der Sprecherklassifizierung in Sprachdialogsystemen [Application of Speaker Classification in Speech-based Dialog Systems]. In Tagungsband der 7. ITG-Fachtagung Sprachkommunikation [Proceedings of the 7th ITG-Conference on Speech Communication]. Kiel, Germany.


Müller, C. and Feld, M. (2006). Towards a Multilingual Approach on Speaker Classification. In Proceedings of the 11th International Conference on Speech and Computer (SPECOM 2006). St. Petersburg, Russia: Anatolya Publishers (pp. 120 -- 124).


Müller, C. (2006). Two-Layered Speaker Classification Using Dynamic Bayesian Networks. In Proceedings of the IASTED International Conference on Computational Intelligence (CI 2006). San Francisco, CA.


Müller, C. (2006). Automatic Recognition of Speakers Age and Gender on the Basis of Empirical Studies. In Proceedings of the 9th International Conference on Spoken Language Processing (Interspeech 2006 -- ICSLP). Pittsburg, PA, USA.


Wilamowitz--Moellendorff, M., Müller, C., Jameson, A., Brandherm, B., and Schwartz, T. (2005). Recognition of Time Pressure via Physiological Sensors: Is the User's Motion a Help or a Hindrance?. In Proceedings of the Workshop on Adapting the Interaction Style to Affective Factors in conjunction with the User Modeling (UM05) conference. Edinburgh, UK (pp. 43--48).


Müller, C. (2005). Estimating the Acoustic Context to Improve Speaker Classification. Presented as poster at the Fifth International and Interdisciplinary Conference on Modeling and Using Context (CONTEXT-05). Paris, France..


Jameson, A., Großmann-Hutter, B., Müller, C., Wittig, F., Kiefer, J., and Rummer, R. (2005). Recognition of Psychologically Relevant Aspects of Context on the Basis of Features of Speech. In Proceedings of the Second International Workshop on Modeling and Retrieval of Context in conjunction with IJCAI'05. Edinburgh, UK.


Krüger, A., Butz, A., Müller, C., Stahl, C., Wasinger, R., Steinberg, K., and Dirschl, A. (2004). The Connected User Interface: Realizing a Personal Situated Navigation Service. In Proceedings of IUI 2004. Madeira, Portugal: ACM Press.


Wittig, F. and Müller, C. (2003). Implicit Feedback for User-Adaptive Systems by Analyzing the User's Speech. In ABIS-03, Adaptivität und Benutzermodellierung in interaktiven Softwaresystemen. Karlsruhe, Germany.


Müller, C., Wittig, F., and Baus, J. (2003). Exploiting Speech for Recognizing Elderly Users to Respond to their Special Needs. In Proceedings of the Eighth European Conference on Speech Communication and Technology (Eurospeech 2003). Geneva, Switzerland (pp. 1305 -- 1308).


Müller, C. and Wittig, F. (2003). Speech as a Source for Ubiquitous User Modeling. In Proceedings of the Workshop on User Modeling in Ubiquitous Computing in conjunction with the Ninth International Conference on User Modeling (UM 2003). Pittsburgh, USA (pp. 46 -- 50).


Müller, C. and Wasinger, R. (2002). Adapting Multimodal Input for the Elderly. In ABIS-02, Adaptivität und Benutzermodellierung in interaktiven Softwaresystemen. Hannover, Germany.


Müller, C. (2002). Multimodal Dialog in a Pedestrian Navigation System. In Proceedings of ISCA Tutorial and Research Workshop on Multi-Modal Dialogue in Mobile Environments. Kloster Irsee, Germany (pp. 42 -- 44).


Krüger, A., Kruppa, M., Müller, C., and Wasinger, R. (2002). Readapting Multimodal Presentations to Heterogenous User Groups. In Proceedings of the AAAI-Workshop on Intelligent and Situation-Aware Media and Presentations. Edmonton, Alberta, Canada (pp. 46--54).


Müller, C., Großmann-Hutter, B., Jameson, A., Rummer, R., and Wittig, F. (2001). Recognizing Time Pressure and Cognitive Load on the Basis of Speech: An Experimental Study. In UM2001, User Modeling: Proceedings of the Eighth International Conference. New York - Berlin: Springer (pp. 24 -- 33).


Großmann-Hutter, B. and Müller, C. (1999). Experimentelle Untersuchung von Spracheingaben unter kognitiver Belastung zur Benutzermodellbildung. In ABIS-99, Adaptivität und Benutzermodellierung in interaktiven Softwaresystemen. Magdeburg, Germany: Otto-von-Guericke University.