Source-filter parametric synthesis enables voice modification that unit-selection cannot.
Evidence
One benefit of statistical parametric synthesis is that the source–filter-type synthesis of speech signals provides possibilities for changing the characteristics of voice, such as speaking styles and prosodic features, and possibly even provides multilingual support (Zen et al., 2009). With the unit-selection method, such modifications are a bit complicated, as voice conversion techniques have to be utilized (Stylianou et al., 1998), which may degrade the quality of the speech. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2263
Categorization
- XREF: The source-filter model of speech connects to the reader’s broader acoustics knowledge of vocal tract filtering. — connects to: Unit-selection synthesis achieves naturalness at the cost of huge databases and inflexibility; Statistical parametric synthesis quality surpasses knowledge-based but trails unit-selection synthesis.; Different voice qualities result from distinct vocal fold modes
- corroborated: 2 independent passages support this claim — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2263