Abstract
The study of dynamic aspects of speech production in Portuguese is very important to characterize vowel nasalization. In this context, the analysis of velum movement remains a challenging task and only a few studies present articulatory descriptions of Portuguese nasal vowels.
Advances in real-time MRI (magnetic resonance imaging) allow the acquisition of vocal tract images with reasonable spatial and temporal resolution to enable observation and quantification of articulatory movements. The resulting data consists of large image sequences and the structures of interest (e.g., oral cavity) have to be identified (segmented) throughout to enable analysis which can be a time consuming task.
This article presents a segmentation tool for real-time MR image sequences of the oral and nasal cavities. The proposed tool has been implemented using MevisLab and provides features for the analysis of the resulting data.
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References
Sampson, R.: Nasal Vowel Evolution in Romance. Oxford University Press (1999)
Lacerda, A., Head, B.: Análise de sons nasais e sons nasalizados do português. Revista do Laboratório de Fonética Experimental de Coimbra 6, 5–70 (1966)
Lovatto, L., Amelot, A., Crevier-Buchman, L., Basset, P., Vaissière, J.: A fiberscopic analysis of nasal vowels in Brazilian Portuguese. In: ICPhS 2007, Saarbrücken, pp. 549–552 (2007)
Sousa, E.M.d.: Para a caracterização fonético-acústica da nasalidade no Português do Brasil. Msc dissert. in linguistics, Univ. Est. de Campinas, Brasil (1994)
Ashby, S., Cummins, F., Barbosa, S., Campani, N.: Nasal heads or nasal tails? a pan lusophone survey of preconsonantal murmur. In: ICPhS 2011, Hong Kong (2011)
Oliveira, C., Martins, P., Teixeira, A.: Speech rate effects on European Portuguese nasal vowels. In: InterSpeech, Brighton (2009)
Shosted, R.: Excrescent nasal codas in brazilian portuguese: an electropalato- graphic study. In: ICPhS 2011, Hong Kong (2011)
Teixeira, A., Vaz, F., Príncipe, J.: Influence of dynamics in the perceived naturalness of Portuguese nasal vowels. In: ICPhS, San Francisco (1999)
Oliveira, C., Teixeira, A.: On gestures timing in European Portuguese nasals. In: ICPhS, Saarbrücken (2007)
Martins, P., Carbone, I., Silva, A., Teixeira, A.: An MRI study of European Portuguese nasals, Antwerp (2007)
Martins, P., Carbone, I., Pinto, A., Silva, A., Teixeira, A.: European Portuguese MRI based speech production studies. Speech Communication 50(11-12), 925–952 (2008)
Falcão, A., Udupa, J., Samarasekera, S., Sharma, S., Hirsch, B., Lotufo, R.: User-steered image segmentation paradigms: Live wire and live lane. Graphical Models and Image Processing 60(4), 233–260 (1998)
Teixeira, A., Martins, P., Oliveira, C., Ferreira, C., Silva, A., Shosted, R.: Real-time MRI for Portuguese: Database, Methods and Applications. In: Caseli, H., Villavicencio, A., Teixeira, A., Perdigão, F. (eds.) PROPOR 2012. LNCS, vol. 7243, pp. 306–317. Springer, Heidelberg (2012)
Engwall, O., Delvaux, V., Metens, T.: Interspeaker variation in the articulation of French nasal vowels. In: Proc. 7th ISSP, Ubatuba, pp. 3–10 (2006)
Oliveira, C.: Do Grafema ao Gesto: Contributos Linguísticos para um Sistema de Síntese de Base Articulatória. PhD thesis, University of Aveiro (2009)
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Silva, S., Martins, P., Oliveira, C., Silva, A., Teixeira, A. (2012). Segmentation and Analysis of the Oral and Nasal Cavities from MR Time Sequences. In: Campilho, A., Kamel, M. (eds) Image Analysis and Recognition. ICIAR 2012. Lecture Notes in Computer Science, vol 7325. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-31298-4_26
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DOI: https://doi.org/10.1007/978-3-642-31298-4_26
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