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The Scientific World Journal
Volume 2014, Article ID 627189, 12 pages
Research Article

Voice Quality Modelling for Expressive Speech Synthesis

1Computer Science, Multimedia and Telecommunication Studies, Universitat Oberta de Catalunya (UOC), Rambla del Poblenou 156, 08018 Barcelona, Spain
2Grup de Recerca en Tecnologies Mèdia (GTM), Universitat Ramon Llull, La Salle, Quatre Camins 2, 08022 Barcelona, Spain

Received 25 August 2013; Accepted 13 November 2013; Published 22 January 2014

Academic Editors: L. Angrisani and J. A. Apolinario Jr.

Copyright © 2014 Carlos Monzo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents the perceptual experiments that were carried out in order to validate the methodology of transforming expressive speech styles using voice quality (VoQ) parameters modelling, along with the well-known prosody (, duration, and energy), from a neutral style into a number of expressive ones. The main goal was to validate the usefulness of VoQ in the enhancement of expressive synthetic speech in terms of speech quality and style identification. A harmonic plus noise model (HNM) was used to modify VoQ and prosodic parameters that were extracted from an expressive speech corpus. Perception test results indicated the improvement of obtained expressive speech styles using VoQ modelling along with prosodic characteristics.