ISCA Archive Interspeech 2008
ISCA Archive Interspeech 2008

Glottal spectral separation for parametric speech synthesis

João P. Cabral, Steve Renals, Korin Richmond, Junichi Yamagishi

The great advantage of using a glottal source model in parametric speech synthesis is the degree of parametric flexibility it gives to transform and model aspects of voice quality and speaker identity. However, few studies have addressed how the glottal source affects the quality of synthetic speech.

Here, we have developed the Glottal Spectral Separation (GSS) method which consists of separating the glottal source effects from the spectral envelope of the speech. It enables us to compare the LF-model with the simple impulse excitation, using the same spectral envelope to synthesize speech. The results of a perceptual evaluation showed that the LF-model clearly outperformed the impulse. The GSS method was also used to successfully transform a modal voice into a breathy or tense voice, by modifying the LF-parameters.

The proposed technique could be used to improve the speech quality and source parametrization of HMM-based speech synthesizers, which use an impulse excitation.

doi: 10.21437/Interspeech.2008-176

Cite as: Cabral, J.P., Renals, S., Richmond, K., Yamagishi, J. (2008) Glottal spectral separation for parametric speech synthesis. Proc. Interspeech 2008, 1829-1832, doi: 10.21437/Interspeech.2008-176

  author={João P. Cabral and Steve Renals and Korin Richmond and Junichi Yamagishi},
  title={{Glottal spectral separation for parametric speech synthesis}},
  booktitle={Proc. Interspeech 2008},