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Speech synthesis with weighted parameters at phoneme boundaries

  • US 5,659,664 A
  • Filed: 06/06/1995
  • Issued: 08/19/1997
  • Est. Priority Date: 03/17/1992
  • Status: Expired due to Fees
First Claim
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1. A method of speech synthesis comprising the steps of:

  • determining a set of control parameters required for the control of the synthesis of the speech;

    storing said control parameters in either a matrix or as a sequence list of each polyphone;

    defining a behavior of a given control parameter with respect to a time period around each phoneme boundary;

    weighting each of said matrix or sequence list by an individual weight function;

    forming a weighted mean value for joining polyphones by multiplication by a cosine function;

    joining polyphones by use of said weighted mean values which are defined by associating two matrices or sequence lists;

    matching a duration of each phoneme to a neighboring polyphone by quantizing the duration for one parameter sampling interval; and

    synthesizing a speech signal from said phonemes.

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