좁은대역 스펙트럼의 차이값과 상관계수에 의한 화자확인 연구 = A Study on Speaker Identification by Difference Sum and Correlation Coefficients of Narrow-band Spectrum

다국어 초록 (Multilingual Abstract)

We examined some problems in speaker identification procedures: transormation of acoustic parameters into auditory scales, invalied measurement values, and comparability of spectral energy values across the frequency range. To resolve those probems, we analyzed the acoustic spectral energy of three Korean numbers produced by ten female students from narrow-bank spectrograms at 19 proportional time points of each voiced segment. Then, cells of the first five spectral matrices were averaged to form a matrix model for each speaker. The correlation coefficients and sum of the absolute amplitude difference in each pair of the spectral models of the ten subjects were obtained. Also, some individual matrix models were compared to those of the same subject or the other subject with a similar spectral model. Results showed that in numbers '2' and '9' subjects could not be clearly distinguishedfrom the others but in number '4' it shed some possibility of setting threshold values forspeaker identification if we employed the coefficients and the sum of absolute difference. Further studies would be desirable on various combinations of the range of long-term average spectra and the degree of signal pre-emphasis.