Title :
Optimization of acoustic-to-articulatory mapping
Author :
Prado, P.P.L. ; Shiva, E.H. ; Childers, D.G.
Author_Institution :
Dept. of Electr. Eng., Florida Univ., FL, USA
Abstract :
An optimization approach for estimating vocal tract configurations from the speech signal is presented. The scheme concatenates a gradient search and linear successive approximation, providing fast convergence and small errors. The objective function is generated by the least-absolute-value (l1-norm) error between the model-derived and the speech-derived first three formants. The gradient search is accelerated by using an algorithm inspired by the Fletcher-Reeves method. Linear successive approximation assures convergence in the region near the optimum articulatory vector. Constraints are imposed on the articulatory parameters to avoid physiologically impossible configurations
Keywords :
convergence; optimisation; speech analysis and processing; acoustic-to-articulatory mapping; constraints; fast convergence; gradient search; linear successive approximation; optimization; small errors; speech signal; vocal tract configurations; Acceleration; Convergence; Linear approximation; Measurement techniques; Multidimensional systems; Pharynx; Signal mapping; Speech analysis; Tongue; Vectors;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-0532-9
DOI :
10.1109/ICASSP.1992.226127
