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Zero-phase inverse filtering for extraction of source characteristics

Ananthapadmanabha, T and Yegnanarayana, B (2003) Zero-phase inverse filtering for extraction of source characteristics. In: IEEE International Conference on ICASSP '77. Acoustics, Speech, and Signal Processing, May 1977.

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Abstract

The instants at which significant excitation of vocal tract take place during voicing are referred to as epochs. Epochs and strengths of excitation pulses at epochs are useful in characterizing voice source. Epoch filtering technique proposed by the authors determine epochs from speech waveform. In this paper we propose zero-phase inverse filtering to obtain strengths of excitation pulses at epochs. Zero-phase inverse filter compensates the gross spectral envelope of short-time spectrum of speech without affecting phase characteristics. Linear prediction analysis is used to realize the zero-phase inverse filter. Source characteristics that can be derived from speech using this technique are illustrated with examples.

Item Type: Conference Paper
Additional Information: Copyright 1977 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 27 Dec 2011 08:24
Last Modified: 27 Dec 2011 08:24
URI: http://eprints.iisc.ernet.in/id/eprint/42902

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