Speech segment network approach for optimization of synthesis unit set

Naoto Iwahashi, Yoshinori Sagisaka

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In this paper, a speech segment network approach for the construction of a suitable synthesis unit set with which high-quality speech can be synthesized, and yet which is of small enough size to be practical, is proposed. The speech segment network approach selects a synthesis unit set in which segmental and/or inter-segmental distortions are minimized by using combinatorial optimization methods such as iterative improvement and simulated annealing. Experimental results using diphone segments have shown that the suitable diphone unit sets, with total or maximum of inter-segmental distortion reduced by about 35 and 30%, respectively, can be constructed using this method. This reduction rate was enhanced as the segment candidate population increased. Effectiveness of this unit set design was also perceptually confirmed by a listening test, using speech synthesized with the selected diphone unit set.

Original languageEnglish
Pages (from-to)335-352
Number of pages18
JournalComputer Speech and Language
Issue number4
Publication statusPublished - 1995 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Software
  • Theoretical Computer Science
  • Human-Computer Interaction


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