Assessment of dutch pronunciation by means of automatic speech recognition technology.
Catia Cucchiarini, Febe de Wet, Helmer Strik, Lou Boves · 1998
Experiments were carried out to determine whether log-likelihood ratios (LRs) can be employed to improve automatic assessment of Dutch pronunciation. Read speech of natives and non-natives was judged by three groups of expert raters and was then analyzed by means of a continuous speech recognizer. Three automatic measures were calculated, two LRs and rate of speech (ros), and then compared with the expert ratings. It appears that expert ratings of pronunciation quality can accurately be predicted on the basis of ros alone and that LRs do not contribute to better prediction. However, LRs can be useful to automatic pronunciation assessment because they can help detect fast speakers who produce totally wrong sentences. 1. INTRODUCTION The eventual aim of the research reported on in this paper is to develop an automatic system of pronunciation grading for Dutch by using speech recognition technology. As in other studies [1, 2, 3], in this investigation the performance of the speech recog...