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- W2071650246 abstract "Computer-Assisted Language Learning (CALL) applications for improving the oral skills of low-proficient learners have to cope with non-native speech that is particularly challenging. Since unconstrained non-native ASR is still problematic, a possible solution is to elicit constrained responses from the learners. In this paper, we describe experiments aimed at selecting utterances from lists of responses. The first experiment on utterance selection indicates that the decoding process can be improved by optimizing the language model and the acoustic models, thus reducing the utterance error rate from 29-26% to 10-8%. Since giving feedback on incorrectly recognized utterances is confusing, we verify the correctness of the utterance before providing feedback. The results of the second experiment on utterance verification indicate that combining duration-related features with a likelihood ratio (LR) yield an equal error rate (EER) of 10.3%, which is significantly better than the EER for the other measures in isolation." @default.
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- W2071650246 date "2010-01-01" @default.
- W2071650246 modified "2023-10-11" @default.
- W2071650246 title "Optimizing Automatic Speech Recognition for Low-Proficient Non-Native Speakers" @default.
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- W2071650246 doi "https://doi.org/10.1155/2010/973954" @default.
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