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Processing device for speech synthesis by addition of overlapping wave forms

  • US 5,524,172 A
  • Filed: 04/04/1994
  • Issued: 06/04/1996
  • Est. Priority Date: 09/02/1988
  • Status: Expired due to Term
First Claim
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1. Method of speech synthesis from speech sound elements comprising the steps of:

  • (a) analyzing at least voiced sounds of the sound element, by windowing by means of a filtering window having an amplitude decreasing to zero at the edges of the window, whose width is at least substantially equal to the shorter of an original fundamental period and a fundamental synthesis period,(b) replacing the signals resulting from windowing corresponding to each sound element with a time shift thereof equal to the fundamental synthesis period, which is lesser than or greater than the original fundamental period responsive to prosodic information relative to the fundamental synthesis period, and(c) summing the thus shifted signal to synthesize speech, said method being devoid of a modification of a pitch period of the speech sounds elements by spectral transformation between steps (a) and (b).

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