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Method for facilitating text to speech synthesis using a differential vocoder

  • US 20070106513A1
  • Filed: 11/10/2005
  • Published: 05/10/2007
  • Est. Priority Date: 11/10/2005
  • Status: Abandoned Application
First Claim
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1. A method for facilitating text to speech synthesis, comprising:

  • providing a database of preconditioned encoded speech tokens, each of the preconditioned encoded speech tokens in a differential encoding format;

    receiving a call from a text to speech engine for a requested speech waveform unit, the requested speech waveform unit corresponding to a text segment to be synthesized into speech;

    retrieving from the database of preconditioned encoded speech tokens a preconditioned encoded speech token corresponding to the requested speech waveform unit;

    pre-appending a seed token onto the preconditioned encoded speech token, to provide a seeded preconditioned encoded speech token;

    decoding the seeded preconditioned encoded speech token with a differential vocoder to provide a seeded speech waveform unit having a seed portion followed by a speech waveform portion;

    removing the seed portion from the seeded speech waveform unit to provide the requested speech waveform unit; and

    returning the requested speech waveform unit to the text to speech engine.

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