Epoch Extraction by Phase Modelling of Speech Signals

Vijayan, K and Kodukula, Sri Rama Murty (2016) Epoch Extraction by Phase Modelling of Speech Signals. Circuits, Systems, and Signal Processing, 35 (7). pp. 2584-2609. ISSN 0278-081X

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Abstract

Epochs are instants of significant excitation of vocal-tract system in speech production process. In this paper, we attempt to extract information about epochs from phase spectra of speech signals. The phase spectrum of speech is modelled as the response of an allpass (AP) filter, and the resulting error signal is used for epoch extraction. The parameters of AP model are estimated by imposing sparsity constraints on the error signal. The error signal, thus obtained, exhibits prominent peaks at epoch locations. The epochal candidates obtained from the error signal are refined using a dynamic programming algorithm. The performance of the proposed method is consistent across genders and is comparable with the state-of-the-art methods.

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IITH Creators:	IITH Creators ORCiD Kodukula, Sri Rama Murty https://orcid.org/0000-0002-6355-5287
Item Type:	Article
Uncontrolled Keywords:	Phase spectrum, Allpass modelling, Entropy, Cauchy distribution, Epoch extraction,
Subjects:	Electrical Engineering > Wireless Communication Electrical Engineering > Electrical and Electronic
Divisions:	Department of Electrical Engineering
Depositing User:	Team Library
Date Deposited:	17 Jun 2016 09:00
Last Modified:	05 Dec 2017 03:57
URI:	http://raiithold.iith.ac.in/id/eprint/2465
Publisher URL:	https://doi.org/10.1007/s00034-015-0166-6
OA policy:	http://www.sherpa.ac.uk/romeo/issn/0278-081X/
Related URLs:	Google Scholar

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