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For a reading tutor, the most important task is to detect the reading miscues such as insertions, omissions, etc. This paper constructed a Chinese reading miscues detection system based on technologies of general large vocabulary continuous speech recognition and proposed two methods to improve the performance of the detection. The first is to align the reference to the confusion network resulted...
In this paper, we present a CALL system with novel two-pass architecture for sentence reading miscues detection. The research is concentrated on the effect of the language model (LM) of the system, which is necessary for recognizing what is actually spoken by the speaker. We compared the two situations of using LM or not in a one-pass baseline system at first, and found that LM can lead to relatively...
This paper discusses the vowel pronunciation quality assessment of our computer assisted Mandarin Chinese learning system. Under the speech recognition framework, phonetic pronunciation assessment is usually based on the phonetic posterior probability score, which may be computed by normalizing the frame-based posterior probability or be calculated on the phone segment directly. By the first method,...
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