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A publicação pode ser exportada nos seguintes formatos: referência da APA (American Psychological Association), referência do IEEE (Institute of Electrical and Electronics Engineers), BibTeX e RIS.

Exportar Referência (APA)
Dias, J., Pellegrini, T, Hedayati, V., Trancoso, I. & Hämäläinen, A. (2014). Speaker age estimation for elderly speech recognition in European Portuguese. In Chng E.S. and Li H. and Meng H. and Ma B. and Xie L (Ed.), 15th Annual Conference of the International Speech Communication Association (INTERSPEECH 2014). Singapura: International Speech and Communication Association.
Exportar Referência (IEEE)
J. M. Dias et al.,  "Speaker age estimation for elderly speech recognition in European Portuguese", in 15th Annu. Conf. of the Int. Speech Communication Association (INTERSPEECH 2014), Chng E.S. and Li H. and Meng H. and Ma B. and Xie L, Ed., Singapura, International Speech and Communication Association, 2014
Exportar BibTeX
@inproceedings{dias2014_1708489667410,
	author = "Dias, J. and Pellegrini, T and Hedayati, V. and Trancoso, I. and Hämäläinen, A.",
	title = "Speaker age estimation for elderly speech recognition in European Portuguese",
	booktitle = "15th Annual Conference of the International Speech Communication Association (INTERSPEECH 2014)",
	year = "2014",
	editor = "Chng E.S. and Li H. and Meng H. and Ma B. and Xie L",
	volume = "",
	number = "",
	series = "",
	publisher = "International Speech and Communication Association",
	address = "Singapura",
	organization = "ISCA International Speech and Communication Association "
}
Exportar RIS
TY  - CPAPER
TI  - Speaker age estimation for elderly speech recognition in European Portuguese
T2  - 15th Annual Conference of the International Speech Communication Association (INTERSPEECH 2014)
AU  - Dias, J.
AU  - Pellegrini, T
AU  - Hedayati, V.
AU  - Trancoso, I.
AU  - Hämäläinen, A.
PY  - 2014
SN  - 2308-457X
CY  - Singapura
AB  - Phone-like acoustic models (AMs) used in large-vocabulary automatic speech recognition (ASR) systems are usually trained with speech collected from young adult speakers. Using such models, ASR performance may decrease by about 10% absolute when transcribing elderly speech. Ageing is known to alter speech production in ways that require ASR systems to be adapted, in particular at the level of acoustic modeling. In this study, we investigated automatic age estimation in order to select age-specific adapted AMs. A large corpus of read speech from European Portuguese speakers aged 60 or over was used. Age estimation (AE) based on i-vectors and support vector regression achieved mean error rates of about 4.2 and 4.5 years for males and females, respectively. Compared with a baseline ASR system with AMs trained using young adult speech and a WER of 13.9%, the selection of five-year-range adapted AMs, based on the estimated age of the speakers, led to a decrease in WER of about 9.3% relative (1.3% absolute). Comparable gains in ASR performance were observed when considering two larger age ranges (60-75 and 76-90) instead of six five-year ranges, suggesting that it would be sufficient to use the two large ranges only.
ER  -