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  Tracking contours of orofacial articulators from real-time MRI of speech.

Labrunie, M., Badin, P., Voit, D., Joseph, A. A., Lamalle, L., Vilain, C., et al. (2016). Tracking contours of orofacial articulators from real-time MRI of speech. In Proceedings of Interspeech 2016 (pp. 470-474). Red Hook, N.Y.: Curran. doi:10.21437/Interspeech.2016-78.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-AEC0-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-B004-1
Genre: Conference Paper

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 Creators:
Labrunie, M., Author
Badin, P., Author
Voit, D.1, Author              
Joseph, A. A.1, Author              
Lamalle, L., Author
Vilain, C., Author
Boë, L. J., Author
Frahm, J.1, Author              
Affiliations:
1Biomedical NMR Research GmbH, MPI for biophysical chemistry, Max Planck Society, ou_578634              

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 Abstract: We introduce a method for predicting midsagittal contours of orofacial articulators from real-time MRI data. A corpus of about 26 minutes of speech has been recorded of a French speaker at a rate of 55 images / s using highly undersampled radial gradient-echo MRI with image reconstruction by nonlinear inversion. The contours of each articulator have been manually traced for a set of about 60 images selected – by hierarchical clustering – to optimally represent the diversity of the speaker articulations. The data serve to build articulator-specific Principal Component Analysis (PCA) models of contours and associated image intensities, as well as multilinear regression (MLR) models that predict contour parameters from image parameters. The contours obtained by MLR are then refined, using the local information about pixel intensity profiles along the contours' normals, by means of modified Active Shape Models (ASM) trained on the same data. The method reaches RMS of predicted points to reference contour distances between 0.54 and 0.93 mm, depending on articulators. The processing of the corpus demonstrated the efficiency of the procedure, despite the possibility of further improvements. This work opens new perspectives for studying articulatory motion in speech.

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Language(s): eng - English
 Dates: 2016-09
 Publication Status: Published online
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 Identifiers: DOI: 10.21437/Interspeech.2016-78
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Title: Interspeech 2016
Place of Event: San Francisco, Calif.
Start-/End Date: 2016-09-08 - 2016-09-12

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Title: Proceedings of Interspeech 2016
Source Genre: Proceedings
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Publ. Info: Red Hook, N.Y. : Curran
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 470 - 474 Identifier: -