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Method and system for preselection of suitable units for concatenative speech

  • US 7,124,083 B2
  • Filed: 11/05/2003
  • Issued: 10/17/2006
  • Est. Priority Date: 06/30/2000
  • Status: Expired due to Term
First Claim
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1. A triphone preselection cost database for use in speech synthesis, the database generated according to a method comprising:

  • 1) selecting a triphone sequence u1-u2-u3;

    2) calculating a preselection cost for each 5-phoneme sequence ua-u1-u2-u3-ub, where u2 is allowed to match any identically labeled phoneme in a database and the units ua and ub vary over the entire phoneme universe; and

    3) storing a group of the selected triphone sequences exhibiting the lowest costs in a triphone preselection cost database by;

    a) determining a plurality of N least cost database units for the particular 5-phoneme context;

    b) performing the union of the N least cost units for all combinations of ua and ub;

    c) storing the union created in step b) in a triphone preselection cost database; and

    d) repeating steps

         1)–

    3) for each possible triphone sequence.

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