Speaker verification under degraded conditions using vowel like and nonvowel like regions

Abstract

This thesis proposes a speaker verification system by independent processing of vowel like regions VLRs and non vowel like regions non VLRs for achieving better SV perfor mance under clean and degraded conditions VLRs are defined as the speech regions belonging to vowels diphthongs and semivowels and rest of the consonants as non VLRs Methods are proposed for detecting VLRs and non VLRs using excitation source informa tion The VLR onset point VLROPs and end points VLREPs are hypot