LORIA - Université Nancy 1
Session JEP poster P1 Lundi 9 Juin - 16h00 18h00
Inversion des fricatives par codebook hypercuboïque
- Farid Feiz ( LORIA)
- Blaise Potard ( LORIA)
- Yves Laprie ( LORIA)
- Résumé : The objective is to recover the vocal tract shape dynamics from the speech signal of vowels and fricatives. The method relies on the analysis-by-synthesis paradigm and is an extension of the method proposed by Ouni and Laprie which exploits a hypercubic articulatory table to represent the synthesis facet, i.e. Maeda's articulatory model. The first major modification is the use of parallelepiped instead of cubes. The new construction strategy only subdivides the articulatory space in the articulatory direction which gives rise to the strongest non-linearities. This enables a substantial reduction of the table size. The second major modification is the inversion of fricative sounds. In addition to the articulatory parameters the relative location of the noise source downstream the constriction is taken into account. This gives rise to three different articulatory codebooks, each corresponding to the relative position of the source with respect to the main constriction. This new inversion method has been evaluated on VCV sequences.
Session JEP poster P4 Mardi 10 Juin - 14h00 16h00
Inversion acoustique-articulatoire dynamique par codebook hypercuboïque : premiers résultats
- Blaise Potard ( LORIA - Université Nancy 1)
- Résumé : Our goal is to recover articulatory information from the speech signal by acoustic-to-articulatory inversion. Like most inversion methods proposed in the literature, our method relies on the analysis-by-synthesis paradigm, here based on Maeda's articulatory model. After an overall description of the inversion method the paper presents a few inversions of formants frequencies trajectories obtained from synthesizing articulatory data and compare the obtained articulatory trajectories to the original.