Real-time MRI for Portuguese: Database, methods and applications

António Teixeira, Paula Martins, Catarina Oliveira, Carlos Ferreira, Augusto Silva, Ryan Shosted

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish (US)
Title of host publicationComputational Processing of the Portuguese Language
Subtitle of host publication10th International Conference, PROPOR 2012
Place of PublicationBerlin
Number of pages12
ISBN (Print)9783642288845
StatePublished - 2012
Event10th International Conference on Computational Processing of Portuguese, PROPOR 2012 - Coimbra, Portugal
Duration: Apr 17 2012Apr 20 2012

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume7243 LNAI
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other10th International Conference on Computational Processing of Portuguese, PROPOR 2012


  • European Portuguese
  • Real-Time MRI
  • laterals
  • nasal vowels
  • speech dynamics
  • taps
  • trills

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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