Formant Analysis of Bangla Vowel for Automatic Speech Recognition

摘要

To provide new technological benefits to the mass people, nowadays, regional and local languagerecognition draws attention to the researchers. Similarly to other languages, Bangla speech recognitionscheme is demandable. A formant is considered as the resonance frequency of vocal tract. Formantfrequencies play an important role for the purpose of automatic speech recognition, due to its noise robustcharacteristics. In this paper, Bangla vowels are investigated to acquire formant frequencies and itscorresponding bandwidth from continuous Bangla sentences, which are considered as potential parametersfor wide voice applications. For the purpose of formant analysis, cepstrum based formant estimation andLinear Predictive Coding (LPC) techniques are used. In order to acquire formant characteristics, enrichcontinuous sentences and widely available Bangla language corpus namely “SHRUTI” is considered.Intensive experimentation is carried out to determine formant characteristics (frequency and bandwidth) ofBangla vowels for both male and female speakers. Finally, vowel recognition accuracy of Bangla languageis reported considering first three formants..