Abstract

Real-time Magnetic Resonance Imaging (RT-MRI) is a powerful method for quantitative analysis of speech. Current state-of-the-art methods use constrained reconstruction to achieve high frame rates and spatial resolution. The reconstruction involves two free parameters that can be retrospectively selected: 1) the temporal resolution and 2) the regularization parameter λ, which balances temporal regularization and fidelity to the collected MRI data. In this work, we study the sensitivity of derived quantitative measures of vocal tract function to these two parameters. Specifically, the cross-distance between the tongue tip and the alveolar ridge was investigated for different temporal resolutions (21, 42, 56 and 83 frames per second) and values of the regularization parameter. Data from one subject is included. The phrase ‘one two three four five’was repeated 8 times at a normal pace. The results show that 1) a high …

Date

2016

Authors

Johannes Töger, Yongwan Lim, Sajan Goud Lingala, Shrikanth S Narayanan, Krishna S Nayak

Conference

INTERSPEECH

Pages

165-169