Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2003.11b
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- Pages.195-198
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- 2003
An Improvement of Korean Speech Recognition Using a Compensation of the Speaking Rate by the Ratio of a Vowel length
모음길이 비율에 따른 발화속도 보상을 이용한 한국어 음성인식 성능향상
Abstract
The accuracy of automatic speech recognition system depends on the presence of background noise and speaker variability such as sex, intonation of speech, and speaking rate. Specially, the speaking rate of both inter-speaker and intra-speaker is a serious cause of mis-recognition. In this paper, we propose the compensation method of the speaking rate by the ratio of each vowel's length in a phrase. First the number of feature vectors in a phrase is estimated by the information of speaking rate. Second, the estimated number of feature vectors is assigned to each syllable of the phrase according to the ratio of its vowel length. Finally, the process of feature vector extraction is operated by the number that assigned to each syllable in the phrase. As a result the accuracy of automatic speech recognition was improved using the proposed compensation method of the speaking rate.
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