Sixth International Conference on Spoken Language Processing (ICSLP 2000)

Beijing, China
October 16-20, 2000

Rejection and Key-Phrase Spottin Techniques Using a Mumble Model in a Czech Telephone Dialog System

Ludek Müller, Filip Jurcicek, Lubos Smidl

Department of Cybernetics, University of West Bohemia in Pilsen, Czech Republic

This paper describes an implementation of a mumble model in a real-time Czech telephone dialog system, and its contribution to speech recognition. A short overview of the Czech telephone dialog system with a special focus on its speech recognition module is given. Furthermore, the structure of a mumble model is described. A new rejection technique based on a local time comparison between a mumble’s score and a word’s score, evaluated by a Viterbi search is explained. A key-phrase spotting technique using a mumble model is shown. The both techniques have been evaluated with a Czech telephone database. The results show the 25.1% equal error rate of the rejection technique and 15.5% equal error rate of the key-phrase spotting technique.


Full Paper

Bibliographic reference.  Müller, Ludek / Jurcicek, Filip / Smidl, Lubos (2000): "Rejection and key-phrase spottin techniques using a mumble model in a czech telephone dialog system", In ICSLP-2000, vol.1, 134-137.