Speaker Verification Using the Shape of the Glottal Excitation Function for Vowels
Michael Wagner · 2006
This paper seeks to establish a baseline for the potential contribution of the shape of the glottal source waveform to speaker recognition. A textdependent speaker verification experiment was performed with 4 monosyllabic words spoken repeatedly by the 16 speakers of the TI46 speech data corpus. A single fundamental period was automatically extracted from each vowel centre and inversefiltered to obtain an approximation of one period of the glottal excitation function for the vowel. The shape of each excitation period was analysed using the magnitude and phase information obtained by means of the discrete Fourier transform. The analysis is independent of both vocal tract and fundamental frequency information and a speaker verification test yields average equalerror rates of 20 % for the female speakers and 31 % for the male speakers. 1.