Real-Time MRI for portuguese

Authors:
António Teixeira;Paula Martins;Catarina Oliveira;Carlos Ferreira;Augusto Silva;Ryan Shosted
Affiliations:
DETI/IEETA, University of Aveiro, Aveiro, Portugal;ESSUA/IEETA, University of Aveiro, Aveiro, Portugal;ESSUA/IEETA, University of Aveiro, Aveiro, Portugal;Institute of Biomedical Research in Light and Image, Faculty of Medicine, University of Coimbra, Coimbra, Portugal;DETI/IEETA, University of Aveiro, Aveiro, Portugal;Dep. of Linguistics, University of Illinois at Urbana-Champaign, Illinois
Venue:
PROPOR'12 Proceedings of the 10th international conference on Computational Processing of the Portuguese Language
Year:
2012

Citing 2
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European Portuguese MRI based speech production studies

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Segmentation and analysis of the oral and nasal cavities from MR time sequences

ICIAR'12 Proceedings of the 9th international conference on Image Analysis and Recognition - Volume Part II

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Abstract

In this paper, we present a database of synchronized audio and Real-Time Magnetic Resonance Imaging (RT-MRI) in order to study dynamic aspects of the production of European Portuguese (EP) sounds. Currently, data have been acquired from one native speaker of European Portuguese. The speech corpus was primarily designed to investigate nasal vowels in a wide range of phonological contexts, but also includes examples of other EP sounds. The RT-MRI protocol developed for the acquisition of the data is detailed. Midsagittal and oblique images were acquired with a frame rate of 14 frames/s, resulting in a temporal resolution of 72 ms. Different image processing tools (automatic and semi-automatic) applied for inspection and analysis of the data are described. We demonstrate the potential of this database and processing techniques with some illustrative examples of Portuguese nasal vowels, taps, trills and laterals.