Ιδρυματικό Αποθετήριο
Πολυτεχνείο Κρήτης
Πολυτεχνείο Κρήτης
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| URI | http://purl.tuc.gr/dl/dias/20C6344E-E7B0-47BA-A2F2-1EEC52249659 | - |
| Αναγνωριστικό | http://www.sciencedirect.com/science/article/pii/S016763939900045X | - |
| Αναγνωριστικό | https://doi.org/10.1016/S0167-6393(99)00045-X | - |
| Γλώσσα | en | - |
| Μέγεθος | 10 pages | el |
| Τίτλος | Combination of machine scores for automatic grading of pronunciation quality | en |
| Δημιουργός | Horacio Franco | en |
| Δημιουργός | Neumeyer Leonardo | en |
| Δημιουργός | Digalakis Vasilis | en |
| Δημιουργός | Διγαλακης Βασιλης | el |
| Δημιουργός | Ronen Orith | en |
| Εκδότης | Elsevier | en |
| Περίληψη | This work is part of an effort aimed at developing computer-based systems for language instruction; we address the task of grading the pronunciation quality of the speech of a student of a foreign language. The automatic grading system uses SRI's DecipherTM continuous speech recognition system to generate phonetic segmentations. Based on these segmentations and probabilistic models we produce different pronunciation scores for individual or groups of sentences that can be used as predictors of the pronunciation quality. Different types of these machine scores can be combined to obtain a better prediction of the overall pronunciation quality. In this paper we review some of the best-performing machine scores and discuss the application of several methods based on linear and nonlinear mapping and combination of individual machine scores to predict the pronunciation quality grade that a human expert would have given. We evaluate these methods in a database that consists of pronunciation-quality-graded speech from American students speaking French. With predictors based on spectral match and on durational characteristics, we find that the combination of scores improved the prediction of the human grades and that nonlinear mapping and combination methods performed better than linear ones. Characteristics of the different nonlinear methods studied are discussed. | en |
| Τύπος | Peer-Reviewed Journal Publication | en |
| Τύπος | Δημοσίευση σε Περιοδικό με Κριτές | el |
| Άδεια Χρήσης | http://creativecommons.org/licenses/by/4.0/ | en |
| Ημερομηνία | 2015-11-02 | - |
| Ημερομηνία Δημοσίευσης | 2000 | - |
| Θεματική Κατηγορία | Automatic pronunciation scoring | en |
| Θεματική Κατηγορία | Combination of scores | en |
| Θεματική Κατηγορία | Hidden Markov models | en |
| Θεματική Κατηγορία | Speech recognition | en |
| Θεματική Κατηγορία | Pronunciation quality assessment | en |
| Θεματική Κατηγορία | Language instruction systems | en |
| Θεματική Κατηγορία | Computer aided language learning | en |
| Βιβλιογραφική Αναφορά | H. Franco, L. Neumeyer, V. Digalakis and O. Ronen, "Combination of machine scores for automatic grading of pronunciation quality," Speech Commun., vol. 30, no. 2-3, pp. 121-130, Feb. 2000. doi:10.1016/S0167-6393(99)00045-X | en |
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