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Real-time text-to-speech conversion system

  • US 4,692,941 A
  • Filed: 04/10/1984
  • Issued: 09/08/1987
  • Est. Priority Date: 04/10/1984
  • Status: Expired due to Fees
First Claim
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1. A machine method of converting electrical signals representing text to audible speech in real time, comprising the steps of:

  • (a) storing, in the memory of a data processing device, a plurality of digitized waveforms consisting of groups of digitally encoded samples, said waveforms being representative of portions of phonemes and of transitions between phonemes;

    (b) analyzing said signals to determine a sequence of phonemes and transitions indicative of the pronunciation of said text;

    (c) generating a sequence of codes representing said phonemes and transitions;

    (d) using said codes to select groups of said digitized waveforms, each said group representing a phoneme or a transition;

    (e) concatenating the waveforms in each of said groups to form a waveform representing the speech sound corresponding to one of said phonemes or transitions;

    (f) alternatingly concatenating said phoneme-representing waveform groups and said transition-representing waveform groups to form a composite waveform train representing in digitized form, the spoken equivalent of said text; and

    (g) converting said digitized composite waveform into an audible analog signal representative thereof.

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