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Method and system for preselection of suitable units for concatenative speech

  • US 7,460,997 B1
  • Filed: 08/22/2006
  • Issued: 12/02/2008
  • Est. Priority Date: 06/30/2000
  • Status: Expired due to Fees
First Claim
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1. A computing device that generates a database for use in speech synthesis, the computing device generating the database according to a method comprising:

  • selecting a triphone sequence;

    calculating a preselection cost for each 5-phoneme sequence where a unit of the 5-phoneme sequence is allowed to match any identically labeled phoneme in a database and at least two units of the 5-phoneme sequence vary over the entire phoneme universe; and

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

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

    performing the union of the N least cost units for all combinations of the at least two units;

    storing the union created in the step of performing the union in the triphone preselection cost database; and

    repeating steps of selecting, calculating and storing a group of the selected triphone sequences for each possible triphone sequence.

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