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The Goodness of Pronunciation algorithm applied to disordered speech

Pellegrini, Thomas and Fontan, Lionel and Mauclair, Julie and Farinas, Jérôme and Robert, Marina The Goodness of Pronunciation algorithm applied to disordered speech. (2014) In: The 15th Annual Conference of the International Speech Communication Association - INTERSPEECH 2014, 14 September 2014 - 18 September 2014 (Singapore, Singapore).

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Abstract

In this paper, we report on a study with the aim of automatically detecting phoneme-level mispronunciations in 32 French speakers suffering from unilateral facial palsy at four different clinical severity grades. We sought to determine if the Goodness of Pronunciation (GOP) algorithm, which is commonly used in Computer-Assisted Language Learning systems to detect learners' individual errors, could also detect segmental deviances in disordered speech. For this purpose, speech read by the 32 speakers was aligned and GOP scores were computed for each phone realization. The highest scores, which indicate large dissimilarities with standard phone realizations, were obtained for the most severely impaired speakers. The corresponding speech subset was manually transcribed at phone-level. 8.3% of the phones differed from standard pronunciations extracted from our lexicon. The GOP technique allowed to detect 70.2% of mispronunciations with an equal rate of about 30% of false rejections and false acceptances. The phone substitutions detected by the algorithm confirmed that some of the speakers have difficulties to produce bilabial plosives, and showed that other sounds such as sibilants are prone to mispronunciation. Another interesting finding was the fact that speakers diagnosed with a same pathology grade do not necessarily share the same pronunciation issues.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Other partners > Université Paris Descartes - Paris V (FRANCE)
Other partners > Université Paris Ouest Nanterre La Défense (FRANCE)
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Deposited By: IRIT IRIT
Deposited On:24 Apr 2015 08:29

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