This paper presents two time-scale pitch-scale modification

techniques to be used in speech synthesis systems. They have

been applied to Microsoft’s Whistler system, which is based on

concatenative synthesis. Both methods are based on a sourcefilter

model, one of them using LPC parameters and the other

one using cepstral parameters. The proposed methods achieve

high quality prosody modification, retain the characteristics of

the donor speaker, allow for spectral manipulation (to reduce

spectral discontinuities at unit boundaries), yield compact

acoustic inventories and improved voiced fricatives.

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In  Proc. of the Int. Conf. on Acoustics, Speech, and Signal Processing

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