Third ESCA/COCOSDA Workshop on Speech Synthesis

November 26-29, 1998
Jenolan Caves House, Blue Mountains, NSW, Australia

Experiments in Voice Quality Modification of Natural Speech Signals: The Spectral Approach

Christophe d’Alessandro, Boris Doval

LIMSI-CNRS, Orsay, France

Voice quality is currently a key issue in speech synthesis research. The lack of realistic intra-speaker voice quality variation is an important source of concern for concatenation-based synthesis methods. A challenging problem is to reproduce the voice quality changes that are occuring in natural speech when the vocal e ort is varying. A new method for voice quality modification is presented. It takes advantage of a spectral theory for voice source signal representation. An algorithm based on periodic-aperiodic decomposition and spectral processing (using the short-term Fourier transform) is described. The use of adaptive inverse filtering in this framework is also discussed. Applications of this algorithm may include: pre-processing of speech corpora, modification of voice quality parameters together with intonation in synthesis, voice transformation. Some experiments are reported, showing convincing voice quality modifications for various speakers.


Full Paper (with 6 sound examples linked from within the paper)

Bibliographic reference.  d’Alessandro, Christophe / Doval, Boris (1998): "Experiments in Voice Quality Modification of Natural Speech Signals: The Spectral Approach", In SSW3-1998, 277-282.