EUROSPEECH 2003 - INTERSPEECH 2003
A series of perceptual experiments using morphed emotional speech sounds was conducted. A high-quality speech modification procedure STRAIGHT  extended to enable auditory morphing was used for providing CD quality test stimuli. The test results indicated that naturalness of morphed speech samples were comparable to natural speech samples and resynthesized samples without any modifications when interpolated. It also indicated that the proposed morphing procedure enables to provide stimulus continuum between different emotional expressions. Partial morphing tests were also conducted to evaluate relative contributions and interdependence between spectral, temporal and source parameters.
Bibliographic reference. Matsui, Hisami / Kawahara, Hideki (2003): "Investigation of emotionally morphed speech perception and its structure using a high quality speech manipulation system", In EUROSPEECH-2003, 2113-2116.