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KMID : 0917520040110030131
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Journal of Speech Sciences
2004 Volume.11 No. 3 p.131 ~ p.142
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A Study on Speaker Identification Parameter Using Difference and Correlation Coeffieicent of Digit_sound Spectrum
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Lee Hoo-Dong
Kang Sun-Mee
Chang Moon-Soo
Yang Byung-Gon
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Abstract
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Speaker identification system basically functions by comparing spectral energy of an individual production model with that of an input signal. This study aimed to develop a new speaker identification system from two parameters from the spectral energy of numeric sounds: difference sum and correlation coefficient. A narrow-band spectrogram yielded more stable spectral energy across time than a wide-band one. In this paper, we collected empirical data from four male speakers and tested the speaker identification system. The subjects produced 18 combinations of three-digit numeric. sounds !en times each. Five productions of each three-digit number were statistically averaged to make a model for each speaker. Then, the remaining five productions were tested on the system. Results showed that when the threshold for the absolute difference sum was set to 1200, all the speakers could not pass the system while everybody could pass if set to 2800. The minimum correlation coefficient to allow all to pass was 0.82 while the coefficient of 0.95 rejected all. Thus, both threshold levels can be adjusted to the need of speaker identification system, which is desirable for further study.
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KEYWORD
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Speaker Identification, Narrow-Band Spectrogram, spectral energy, difference sum, correlation coefficient
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