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Duration Modification Using Glottal Closure Instants and Vowel Onset Points by K. Sreenivasa Rao; B. Yegnanarayana is a Computer Science article available to read on EtoBox.

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This paper proposes a method for duration (time scale) modification using glottal closure instants (GCI, also known as instants of significant excitation) and vowel onset points (VOP). In general, most of the time scale modification methods attempt to vary the duration of speech segments uniformly over all regions. But it is observed that consonant regions and transition regions between a consonant and the following vowel, and between two consonant regions do not vary appreciably with speaking rate. The proposed method implements the duration modification without changing the durations of the transition and consonant regions. Vowel onset points are used to identify the transition and consonant regions. A VOP is the instant at which the onset of the vowel takes place, which corresponds to the transition from a consonant to the following vowel in most cases. The VOPs are computed using the Hilbert envelope of linear prediction (LP) residual. The instants of significant excitation correspond to the instants of glottal closure (epochs) in the case of voiced speech, and to some random excitations, like the onset of burst, in the case of nonvoiced speech. Manipulation of duration is achi

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Author

K. Sreenivasa Rao; B. Yegnanarayana

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0167-6393)

Published

2009

Language

EN

Field

Computer Science (Physical Sciences)