Forensic Voice Comparison with Japanese Vowel Acoustics - A Likelihood Ratio-based Approach Using Segmental Cepstra
نویسنده
چکیده
The suitability of vowel cepstral spectra for forensic voice comparison is explored within a likelihood ratio-based framework. Noncontemporaneous landline telephone recordings of 297 male Japanese speakers are compared using only two replicates each of their five vowels. 14 cepstrally-mean-subtracted LPC CCs from dc to 5 kHz are used as features. Multivariate likelihood ratios estimated for the 297 targetand 43956 nontarget trials give good results: an equal error rate of 0.28% and log likelihood ratio cost of 0.013. It is concluded that the approach has some merit.
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