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Improvements in Pronunciation Evaluation Based on Speech Technology



Год выпуска: 2012
Автор: Dean Luo and Yu Qiao
Издательство: LAP Lambert Academic Publishing
Страниц: 148
ISBN: 9783659182716
Описание
The main goal of this research in this book is to improve automatic pronunciation evaluation of reading-aloud and shadowing based on speech technology for Computer-Assisted Language Learning (CALL) systems. We first investigate the effects and problems of Maximum Likelihood Linear Regression (MLLR) speaker adaptation when used in pronunciation evaluation of reading-aloud. Following the analysis, we propose a novel method, Regularized Maximum Likelihood Regression (Regularized-MLLR) adaptation, to solve the problem of the adverse effects of MLLR adaptation. This method uses a group of teachers' data to regularize learners' transformation matrices so that erroneous pronunciations will not be erroneously transformed as correct ones. Several novel methods are also introduced to improve segmental (phone) and prosodic evaluation of shadowing, which is a popular language teaching practice that is a kind of “repeat-after-me” type exercise, but rather than waiting until the end of the phrase...


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Юлия
Спасибо Юля. Кстати курсовая по законности произвела практически фурор у самой строгой преподавательницы. Еще раз огромное спасибо.