Abstract
Many applications of computer-aided language learning system lack of evaluation and feedback of learning speech.An oral English training system was described.Besides normal speech evaluation,error detection based on phoneme alignment and phoneme recognition was provided.Recommendations for improvement queried from correction knowledge base and prosody modified speech offer learners a timely help.The experimental results show that most mistakes made unconsciously by high-level 2nd language speakers can be corrected by this system.
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