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한국인 영어 학습자의 발음 정확성 자동 측정방법에 대한 연구
정현성 ( Hyunsong Chung ),장태엽 ( Tae Yeoub Jang ),윤원희 ( Weonhee Yun ),윤일승 ( Ilsung Yun ),사재진 ( Jaejin Sa ) 한국외국어대학교 언어연구소 2008 언어와 언어학 Vol.0 No.42
This paper presents a method of automatically assessing non-native speech produced by Korean learners of English. After an input utterance is processed by an automatic aligner to produce information on phoneme and word boundaries, the key modules are designed to output separate scores in each level of segmentals and prosody. For segmental evaluation, the HMM log likelihood scoring method has been adopted to properly compare input speech with native pronunciation. For prosodic scoring, rhythm metrics are employed to capture the rhythm characteristics of the learners`` native language that are expected to remain in their English utterances. The results of correlation analyses between the automatic scores and human raters`` scores suggest that the proposed method can be further applied to enhance performance of pronunciation self-education tools for EFL learners.