영어발음 자동평가 모델

Title
영어발음 자동평가 모델
Other Titles
Automatic Evaluation Model of English Pronunciation
Author(s)
윤규철
Keywords
pronunciation; evaluation; spectrum; F0; intensity; duration; discriminant analysis; 발음; 평가; 스펙트럼; 억양; 강도; 길이; 판별분석; pronunciation; evaluation; spectrum; F0; intensity; duration; discriminant analysis
Issue Date
201104
Publisher
한국중원언어학회
Citation
언어학 연구, no.19, pp.149 - 168
Abstract
The purpose of this paper is to build an automatic evaluation model of English pronunciation. The technique proposed in Yoon (2009) is extended to include the evaluation of segmental proficiency in the form of spectral comparison. A target English sentence is uttered by a group of “good” Korean speakers learning English, another group of “bad” speakers and the third group of model native speakers of English. Each of the utterances of the good and bad groups is compared against all of the utterances of the model group in terms of four factors; spectrum, F0, intensity and duration. Comparison of the spectral envelops, F0 contours, intensity contours and segmental durations between the two matching utterances yielded 4-dimensional coordinates, which were then plotted in a 4-dimensional model space. This creates an automatic evaluation model of English pronunciation proficiency in the form of a discriminant function. The leave-one-out cross- validation created 24 models the predictive power of which was then tested with the use of discriminant analyses. The tests reveal that the prediction rate was 67% for the good group and 80% for the bad group.
URI
http://hdl.handle.net/YU.REPOSITORY/25344
ISSN
1975-8251
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문과대학 > 영어영문학과 > Articles
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