군집화에 의한 자연발화 모음의 포먼트 대푯값 추정 연구
Obtaining Formant Frequencies of Vowels Using Clustering in Spontaneous Speech
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Abstract
This study investigates a method of finding vowel frequencies using clustering. A vowel has several data points for formant frequency that are generally obtained using a formant tracker. However, it is hard to say that any number from the data points is representative of the formant frequency of the vowel. There is general agreement that the so-called steady state of the vowel is the area where the representative formant frequency should be obtained, but there is no consensus on how to define the steady state and how to calculate the representative formant frequency of the vowel. This study shows how the representative formant frequency of a vowel is obtained using clustering after calculating the Root Mean Square Error (RMSE) of the consecutive formant values within the middle 33.3% and 50% of the vowel period. This method can reduce the size of the standard deviation of formant frequencies of the vowel so that the representative formant values have greater explanatory potential.
참고문헌 (21)
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