This paper explores the possibility and extent of non-uniqueness in the acoustic-to-articulatory inversion of speech, from a statistical point of view. It proposes a technique to estimate the non-uniqueness, based on finding peaks in the conditional probability function of the articulatory space. The paper corroborates the existence of non-uniqueness in a statistical sense, especially in stop consonants, nasals and fricatives. The relationship between the importance of the articulator position and non-uniqueness at each instance is also explored.
Cite as: Ananthakrishnan, G., Neiberg, D., Engwall, O. (2009) In search of non-uniqueness in the acoustic-to-articulatory mapping. Proc. Interspeech 2009, 2799-2802, doi: 10.21437/Interspeech.2009-715
@inproceedings{ananthakrishnan09_interspeech,
author={G. Ananthakrishnan and D. Neiberg and Olov Engwall},
title={{In search of non-uniqueness in the acoustic-to-articulatory mapping}},
year=2009,
booktitle={Proc. Interspeech 2009},
pages={2799--2802},
doi={10.21437/Interspeech.2009-715}
}