Evaluation of mel and gammatone filter banks used for spectral analysis in comparison with the direct use of Fft

Abstract

This paper analyses the development of Automatic Speech Recognition systems in relation to the varied types of spectral analysis methods used. A critical evaluation of Mel and Gammatone filter banks used for spectral analysis in comparison with the direct use of FFT spectral values is considered. Research was based on understanding the effectiveness of existing Automatic Speech Recognition systems are specifically focused on Mel and Gammatone filter banks in comparison with FFT spectral values.