4th International Conference on Spoken Language Processing

Philadelphia, PA, USA
October 3-6, 1996

Towards Understanding Spontaneous Speech: Word Accuracy vs. Concept Accuracy

M. Boros (1), W. Eckert (2), Florian Gallwitz (2), Günther Görz (1), G. Hanrieder (1), Heinrich Niemann (1,2)

(1) Bayerisches Forschungszentrum für Wissensbasierte Systeme (FORWISS), Erlangen, Germany
(2) Lehrstuhl für Mustererkennung (Informatik 5), Universität Erlangen/Nürnberg, Erlangen, Germany

In this paper we describe an approach to automatic evaluation of both the speech recognition and understanding capabilities of a spoken dialogue system for train time table information. We use word accuracy for recognition and concept accuracy for understanding performance judgement. Both measures are calculated by comparing these modules' output with a correct reference answer. We report evaluation results for a spontaneous speech corpus with about 10000 utterances. We observed a nearly linear relationship between word accuracy and concept accuracy.

Full Paper

Bibliographic reference.  Boros, M. / Eckert, W. / Gallwitz, Florian / Görz, Günther / Hanrieder, G. / Niemann, Heinrich (1996): "Towards understanding spontaneous speech: word accuracy vs. concept accuracy", In ICSLP-1996, 1009-1012.