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Formant Estimation of Speech Using Discrete Hartley Transform
(2015-08-04T07:34:25Z) Madhukar, B N; Sanjay, Jain; Satyanarayana, P. S.
This paper presents a new method for formant estimation of speech signal using Discrete Hartley Transformapproach. Hitherto, the formant estimation of speech was carried out in temporal and frequency domains using Discrete Fourier Transform (DFT) based approach. A new approach of accomplishing this in the frequency domain using DHT, rather than using the DFT, is proposed. DFT, being a complex transform, takes more computation time for finding the formant frequencies of the speech signal, but DHT being a real transform takes less computation time to do the same with less memory requirement. The relationship between DFT and DHT is made use of for computing the formants, rather than using the DFT directly. The usage of DHT method is found to be optimal than using the direct DFT approach thereby saving implementation cost substantially in the formant estimation of speech signals. The analysis is done by comparing the usage of DFT directly on the speech signal and then using DHT, there by seeing the performance of these mathematical transforms based on computation time, which is used as a performance metric for validating the veracity of performance of the two discrete transforms concerned.