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Apparatus, methods, and programming for speech synthesis via bit manipulations of compressed database

  • US 20040073428A1
  • Filed: 10/10/2002
  • Published: 04/15/2004
  • Est. Priority Date: 10/10/2002
  • Status: Abandoned Application
First Claim
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1. A method of performing text-to-speech synthesis comprising:

  • storing a plurality of encoded speech snippets, each including a sequence of one or more encoded sound representations produced by linear predictive encoding of speech sounds corresponding to a sequence of one or more phonemes, where a plurality of said snippets correspond to sequences of phonemes that are shorter than any of the words in which such a sequence of phonemes occurs;

    storing a desired phonetic representation, indicating a sequence of phonemes to be generated as speech sounds; and

    storing a desired pitch contour, indicating which of different possible pitch values are to be used in the generation of the speech sounds of different phonemes in the phonetic representation;

    selecting from said stored snippets a sequence of such snippets that correspond to the sequence of phonemes in the phonetic representation and concatenating those snippets into a synthesized sequence of such snippets;

    altering the encoded representations associated with one or more of the selected snippets associated with said synthesized sequence to cause the pitch values of the speech sounds represented by each such encoded representation to more closely match the pitch values indicated for the selected snippet'"'"'s corresponding one or more phonemes in the pitch contour; and

    using a linear predictive decoder to convert the synthesized sequences of snippets, including said altered snippets, into a waveform signal representing a sequence of speech sound corresponding to the phonetic representation and the pitch contour.

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