Sixth ISCA Workshop on Speech Synthesis

Bonn, Germany
August 22-24, 2007

Modelling Voiceless Speech Segments by means of an Additive Procedure based on the Computation of Formant Sinusoids

Ingo Hertrich, Hermann Ackermann

Department of General Neurology, University of Tübingen, Germany

A previously developed vowel synthesis algorithm implements formants as sinusoids, amplitude- and phase-modulated by the fundamental frequency (Hertrich and Ackermann, 1999, Journal of the Acoustical Society of America, 106, 2988- 2990). The present study extends this approach to the modelling of the acoustic characteristics of aperiodic speech segments. To these ends, a voiceless signal component is generated by adding at each sample point a random parameter onto the formants' phase progression. Voiceless stop consonants then can be modelled, e.g., by combining a release burst, i.e., an interval in which the formant sinusoids abruptly increase and gradually decrease in amplitude, with formantshaped noise components, representing inter-articulator frication, aspiration, and breathy vowel onset.

Full Paper   Presentation (ppt)

Bibliographic reference.  Hertrich, Ingo / Ackermann, Hermann (2007): "Modelling voiceless speech segments by means of an additive procedure based on the computation of formant sinusoids", In SSW6-2007, 178-181.