On the limitations of voice conversion techniques in emotion identification tasks. Barra, R.; Montero, J. M.; Macías, J.; Gutiérrez Arriola, J. M.; Ferreiros, J.; and Pardo, J. M. In Interspeech 2007. Proceedings of the 8th Annual Conference of the International Speech Communication Association, pages 2233-2236. Antwerp, Belgium, August 27-31, 2007.
On the limitations of voice conversion techniques in emotion identification tasks [pdf]Paper  abstract   bibtex   
The growing interest in emotional speech synthesis urges effective emotion conversion techniques to be explored. This paper estimates the relevance of three speech components (spectral envelope, residual excitation and prosody) for synthesizing identifiable emotional speech, in order to be able to customize voice conversion techniques to the specific characteristics of each emotion. The analysis has been based on a listening test with a set of synthetic mixed-emotion utterances that draw their speech components from emotional and neutral recordings. Results prove the importance of transforming residual excitation for the identification of emotions that are not fully conveyed through prosodic means (such as cold anger or sadness in our Spanish corpus)
@incollection{barra_limitations_2007,
	Author = {Barra, Roberto and Montero, Juan Manuel and Macías, Javier and Gutiérrez Arriola, Juana María and Ferreiros, Javier and Pardo, José Manuel},
	Booktitle = {Interspeech 2007. Proceedings of the 8th Annual Conference of the International Speech Communication Association},
	Date = {2007},
	Date-Modified = {2016-09-24 18:55:58 +0000},
	File = {Attachment:files/870/Barra et al. - 2007 - On the limitations of voice conversion techniques in emotion identification tasks.pdf:application/pdf},
	Keywords = {emotions, speaking styles, speech synthesis, speech technology},
	Pages = {2233-2236},
	Publisher = {Antwerp, Belgium, August 27-31, 2007},
	Title = {On the limitations of voice conversion techniques in emotion identification tasks},
	Url = {http://www-gth.die.upm.es/research/documentation/AI-104Ont-07.pdf},
	Abstract = {The growing interest in emotional speech synthesis urges effective emotion conversion techniques to be explored. This paper estimates the relevance of three speech components (spectral envelope, residual excitation and prosody) for synthesizing identifiable emotional speech, in order to be able to customize voice conversion techniques to the specific characteristics of each emotion. The analysis has been based on a listening test with a set of synthetic mixed-emotion utterances that draw their speech components from emotional and neutral recordings. Results prove the importance of transforming residual excitation for the identification of emotions that are not fully conveyed through prosodic means (such as cold anger or sadness in our Spanish corpus)},
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