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An auditory-based measure for improved phone segment concatenation

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2 Author(s)
Chappell, D.T. ; Robust Speech Process. Lab., Duke Univ., Durham, NC, USA ; Hansen, J.H.L.

This paper describes a new auditory-based distance measure intended for use in a concatenated synthesis technique wherein the time- and frequency-domain characteristics are used to perform natural-sounding speaker synthesis. Whereas most concatenation systems use large databases (often +100,000 units), we begin from a small, limited database (approx. 400 units) and use a new spectral distortion measure to aid in the selection of phones for optimal concatenation. At the transition between speech segments, the new auditory-based distance metric assesses perceived discontinuities in the frequency domain. The distortion measure, which employs the Carney (see J. Acoust. Soc. Am., vol.93, p.401-17, 1993) auditory model, is used to select phones which minimize the perceived distortion between concatenated segments. Moreover, time- and frequency-domain methods can shape the prosodic and spectral characteristics of each speech segment. The final results demonstrate improved performance over standard concatenation methods applied to small databases

Published in:

Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on  (Volume:3 )

Date of Conference:

21-24 Apr 1997