Articulatory-to-acoustic mapping for inverse problem
Mutual dependence of articulatory parameters allows the reducing of codebook volume and helps to improve conditions for global optimum search, The initial approximations of articulatory vectors for the inverse problem solving are sampled along the trajectories of articulatory parameters in synthesized syllables. Piece-wise linear mapping of the space of articulatory parameters onto the space of acoustic parameters, the minimal value of cross-sectional area of the vocal tract and the Reynolds number accelerate the process of optimization over 100 times.
mapping inverse problem codebook global optimum speech