Reducing Audible Spectral Discontinuities


Klabbers, Esther and Veldhuis, Raymond (2001) Reducing Audible Spectral Discontinuities. IEEE Transactions on Speech and Audio Processing, 9 (1). pp. 39-51. ISSN 1063-6676

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Abstract:In this paper, a common problem in diphone synthesis is discussed, viz., the occurrence of audible discontinuities at diphone boundaries. Informal observations show that spectral mismatch is most likely the cause of this phenomenon.We first set out to find an objective spectral measure for discontinuity. To this end, several spectral distance measures are related to the results of a listening experiment. Then, we studied the feasibility of extending the diphone database with context-sensitive diphones to reduce the occurrence of audible discontinuities. The number of additional diphones is limited by clustering consonant contexts that have a similar effect on the surrounding vowels on the basis of the best performing distance measure. A listening experiment has shown that the addition of these context-sensitive diphones significantly reduces the amount of audible discontinuities.
Item Type:Article
Copyright:© 2001 IEEE
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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Metis ID: 201728