Segmentwise unit selection

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Segmentwise unit selection

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© The Institution of Engineering and Technology
Published

Unit selection speech systems generate synthetic speech by concatenation of acoustic units extracted from a natural recording. Given a large speech database, the sequence of units with the best global cost is chosen by means of a Viterbi search. In this reported work, it is shown that small subcosts not related to perceptual measures can affect the sequence of units that is finally chosen, with a potential effect on the quality of synthetic speech. A segmentwise unit selection approach that minimises this effect is then proposed.

Inspec keywords: audio databases; speech synthesis; search problems

Other keywords: unit selection speech systems; speech database; Viterbi search; synthetic speech generation; segmentwise unit selection; natural recording

Subjects: Speech recognition and synthesis; Speech processing techniques; Combinatorial mathematics; Other DBMS; Combinatorial mathematics

References

    1. 1)
    2. 2)
      • Tokuda, K., Kobayashi, T., Imai, S.: `Speech parameter generation from HMM using dynamic features', ICASSP, 1995, Detroit, MI, USA.
    3. 3)
      • Black, A., Taylor, P.: `Automatically clustering similar units for unit selection in speech synthesis', Proc. Eurospeech, 1997, Rhodes, Greece, 2, p. 601–604.
    4. 4)
      • Hunt, A., Black, A.: `Unit selection in a concatenative speech synthesis system using a large speech database', Proc. of ICASSP, 1996, 1, p. 373–376, Taipei, Taiwan.
    5. 5)
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