Samples
FAQ
- What is Text-to-Speech ?
- How does it work ?
- Where can voice solutions be used ?
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How does it work ?
In order to reproduce the natural sound of each language, a narrator records a series of texts, (poetry, political news, sports results, stock exchange updates, etc.) which contain every possible sound in the chosen language.
These recordings are then sliced and organised into an acoustic data base.
During database creation, each recorded utterance is segmented into some or all of the following: diphones, syllables, morphemes, words, phrases, and sentences.
To reproduce words from a text, the TTS system begins by carrying out a sophisticated linguistic analysis that transposes written text into phonetic text.
A grammatical and syntactic analysis then enables the system to define how to pronounce each word in order to reconstruct the sense. We call this the prosody: it gives the rhythm and intonation of a sentence.
Finally, the system produces information associating the phonetic writing with the tone and required length of the pronunciation.
The chain of analysis ends here and sound is generated by selecting the best units stocked in the acoustic data base.
