Abstract

We report on a method of modeling real‐time MRI articulatory speech data using the Haskins task dynamic application (TaDA) framework. TaDA models speech using a set of discrete dynamical regimes that control the formation of vocal tract constrictions (gestures). An utterance can be specified by a gestural score: the pattern of activation of these regimes in time. Individual model articulator degrees of freedom are automatically coordinated according the concurrent demands of the unfolding constrictions. Our modeling procedure consists of two stages: (1) After determining the outline of the midsagittal upper airway, time series of constriction measurements are derived which allow the estimation of the subject‐specific parameters relating the articulator and constriction domains. (2) Gradient descent is utilized to adjust the activation intervals of the gestural score generated by TaDA for that utterance so that the …

Date

April 1, 2009

Authors

Erik Bresch, Louis Goldstein, Shrikanth Narayanan

Journal

The Journal of the Acoustical Society of America

Volume

125

Issue

4_Supplement

Pages

2498-2498

Publisher

Acoustical Society of America