5th International Conference on Spoken Language Processing

Sydney, Australia
November 30 - December 4, 1998

Empowering Knowledge Based Speech Understanding through Statistics

Julia Fischer, Juergen Haas, Elmar Nöth, Heinrich Niemann, Frank Deinzer

Chair for Pattern Recognition, University of Erlangen-Nuremberg, Germany

In this paper we present an innovative approach to speech understanding which is based on a fine-grained knowledge representation automatically compiled from a semantic network and on iterative optimization. Besides allowing an efficient exploitation of parallelism, any-time capability is provided since after each iteration step a (sub-)optimal solution is always available. We apply this approach to a real-world task, which is a dialog system able to answer queries about the German train timetable. In order to speed up the search for the best interpretation of an utterance we make use of statistical methods, e.g. neural networks, n-grams, and classification trees, which are trained on application relevant utterances collected over the public telephone network. At the moment the real-time factor for interpreting the initial user's utterance is 0.7.

Full Paper

Bibliographic reference.  Fischer, Julia / Haas, Juergen / Nöth, Elmar / Niemann, Heinrich / Deinzer, Frank (1998): "Empowering knowledge based speech understanding through statistics", In ICSLP-1998, paper 0369.