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Kalman-Filter Based Join Cost for Unit-Selection Speech Synthesis

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vepa_eurospeech03.pdf (118.6Kb)
Date
2003
Author
Vepa, Jithendra
King, Simon
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Abstract
We introduce a new method for computing join cost in unit-selection speech synthesis which uses a linear dynamical model (also known as a Kalman filter) to model line spectral frequency trajectories. The model uses an underlying subspace in which it makes smooth, continuous trajectories. This subspace can be seen as an analogy for underlying articulator movement. Once trained, the model can be used to measure how well concatenated speech segments join together. The objective join cost is based on the error between model predictions and actual observations. We report correlations between this measure and mean listener scores obtained from a perceptual listening experiment. Our experiments use a state-of-the art unit-selection text-to-speech system: `rVoice' from Rhetorical Systems Ltd.
URI
http://hdl.handle.net/1842/1118
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  • CSTR publications
  • Linguistics and English Language publications

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