Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)
- Volume 17 Issue 3
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- Pages.12-19
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- 1980
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- 1016-135X(pISSN)
A Spoken Korean-Digits Recognition System Based on Linear Prdiction Spectra
선형예측에 의한 숫자음성 자동인식
Abstract
A speech recognition system for separately pronounced Korean digits is described. The system is composed of four stages ; parameter extraction, segmentation by voiced-unovied analysis, formant tracking and pattern matching. Digit speech is segmented into an unvoiced segment and/or a voiced one using ZCR and energy measurements, then to estimate the first three formant frequencies a relatively simple formant tracking scheme is applied to the raw formant data extracted from linear prediction spectra. Finally, pattern matching is made using dynamic programmig method. Recognition experiment is carried out for 150 digit utterences spoken by three male speakers, and recgnition rate 94 % is obtained.
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