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METHOD AND SYSTEM FOR VOICE SYNTHESIS

  • US 20150149181A1
  • Filed: 07/02/2013
  • Published: 05/28/2015
  • Est. Priority Date: 07/06/2012
  • Status: Abandoned Application
First Claim
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1. A method for generating a set of sound signals (9) representative of a text (3) to be converted into audio signals intelligible to a user, comprising the following steps:

  • a) supply, in a database (1), a set of acoustic units, each acoustic unit corresponding to the synthetic acoustic formation of a phoneme or of a diphoneme, said database (1) comprising acoustic units corresponding to the whole set of phonemes or diphonemes used for a given language,b) identify a list of pre-calculated expressions (10), each pre-calculated expression comprising one or more complete word texts,c) record, for each pre-calculated expression, an acoustic frame (7) corresponding to the pronouncing of said pre-calculated expression,d) decompose, by virtue of cross-correlation calculations, each recorded acoustic frame into a sequenced table (5) comprising a series of acoustic unit references from the database modulated at least by one amplitude form factor (α

    (i)A) and by one temporal form factor (α

    (i)T),e1) search through the text (3) to be converted, identify at least a first portion of the text (11) corresponding to at least one pre-calculated expression and decompose into phonemes at least a second portion of the text (12) which does not comprise a pre-calculated expression,e2) insert in place of each pre-calculated expression the equivalent recording from the sequenced table (5), and select, for each phoneme of the second portion of the text (12), one acoustic unit from the database (1),f) prepare a concatenation of acoustic units (19) corresponding to the first and second portions of text (11, 12), in a manner ordered according to the text (3) to be converted,g) generate the audio signals (9) corresponding to said concatenation of acoustic units.

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