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SPEECH SYNTHESIZER, SPEECH SYNTHESIZING METHOD AND PROGRAM PRODUCT

  • US 20120089402A1
  • Filed: 10/12/2011
  • Published: 04/12/2012
  • Est. Priority Date: 04/15/2009
  • Status: Active Grant
First Claim
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1. A speech synthesizer comprising:

  • an analyzer that performs a text analysis of an input document and extract a linguistic feature used for prosody control;

    a first estimator that selects a first prosody model adapted to the extracted linguistic feature from predetermined first prosody models that are models of speech prosody information and that estimates prosody information that maximizes a first likelihood representing probability of the selected first prosody model;

    a selector that selects, from a speech unit storage storing speech units, a plurality of speech units that minimizes a cost function determined in accordance with the prosody information estimated by the first estimator;

    a generator that generates a second prosody model that is a model of prosody information of the selected speech units;

    a second estimator that estimates prosody information that maximizes a third likelihood calculated on the basis of the first likelihood and a second likelihood representing probability of the second prosody model; and

    a synthesizer that generates synthetic speech by concatenating the selected speech units on the basis of the prosody information estimated by the second estimator.

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