3. Speech signal and source-filter model
This approach is based on a source-filter model of speech signal production, controlled by a limited number of parameters. The synthesis consists of two stages:
1. using contextual rules, phonetic-prosodic information is transformed into commands for specifying the temporal evolution of synthesis model parameters;
2. the parameter values thus determined are used by the vocoder to synthesize the acoustic signal.
Historically, this type of technique was the first to emerge, as early as the late 1950s, with the vocoders of the time, and rules developed explicitly through the analysis of phonetic-acoustic corpora. It is still used today, after a period of eclipse in favor of unit concatenation techniques (§
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Speech signal and source-filter model
Prosody
Bibliography
- (1) - SPROAT (R.), MOEBIUS (B.), MAEDA (K.), TZOUKERMANN (E.) - Multilingual text analysis. - Dans Multilingual Text-To-Speech Synthesis – The Bell Labs Approach, SPROAT (R.) et coll. éd., Kluwer Academic Publishers (1998). Ce livre décrit en détail les procédures de synthèse de l'anglais et d'autres langues, et donne une introduction au...
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Acapela http://www.acapela-group.com/
Acapela is the new name of the group formed by BaBel Technologies SA and Babel-Infovox AB, which also absorbed ELAN speech. Acapela offers a wide range of multilingual synthesis solutions, initially developed through research at the Royal Institute of Technology...
Magazines, conferences
Recent developments in the techniques presented here are regularly the subject of articles.
In journals devoted to speech processing:
• IEEE Transactions on Speech and Audio Processing ;
• Speech Communication ;
• Computer Speech and Language ;
• EURASIP Journal...
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