Unit selection speech synthesis has reached high levels of naturalness and intelligibility for neutral read aloud speech. However, synthetic speech generated using neutral read aloud data lacks all the attitude, intention and spontaneity associated with everyday conversations. Unit selection is heavily data dependent and thus in order to simulate human conversational speech, or create synthetic voices for believable virtual characters, we need to utilise speech data with examples of how people talk rather than how people read. In this paper we included carefully selected utterances from spontaneous conversational speech in a unit selection voice. Using this voice and by automatically predicting type and placement of lexical fillers and filled pauses we can synthesise utterances with conversational characteristics. A perceptual listening test showed that it is possible to make synthetic speech sound more conversational without degrading naturalness.
Prediction and realisation of conversational characteristics by utilising spontaneous speech for unit selection
S. Andersson,Kallirroi Georgila,D. Traum,M. Aylett,R. Clark
Published 2010 in Proceedings of the International Conference on Speech Prosody
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- Publication year
2010
- Venue
Proceedings of the International Conference on Speech Prosody
- Publication date
2010-05-01
- Fields of study
Linguistics, Computer Science
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