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Authors: Lucas D. Terissi and Juan C. Gómez

Affiliation: Laboratory for System Dynamics and Signal Processing, FCEIA, Universidad Nacional de Rosario, Argentina

Keyword(s): Hidden Markov Models, Audio-Visual Speech Processing, Facial Animation.

Related Ontology Subjects/Areas/Topics: Applications ; Audio and Speech Processing ; Biometrics and Pattern Recognition ; Digital Signal Processing ; Image and Video Processing, Compression and Segmentation ; Multidimensional Signal Processing ; Multimedia ; Multimedia Signal Processing ; Multimodal Signal Processing ; Pattern Recognition ; Software Engineering ; Telecommunications

Abstract: A speech driven MPEG-4 compliant facial animation system is proposed in this paper. The main feature of the system is the audio-to-visual conversion based on the inversion of an Audio-Visual Hidden Markov Model. The Hidden Markov Model Inversion algorithm is derived for the general case of considering full covariance matrices for the audio-visual observations. A performance comparison with the more common case of considering diagonal covariance matrices is carried out. Experimental results show that the use of full covariance matrices is preferable since it leads to an accurate estimation of the visual parameters, yielding the same performance as in the case of using diagonal covariance matrices, but with a less complex model.

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Paper citation in several formats:
D. Terissi, L. and C. Gómez, J. (2008). HMM INVERSION WITH FULL AND DIAGONAL COVARIANCE MATRICES FOR AUDIO-TO-VISUAL CONVERSION. In Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2008) - SIGMAP; ISBN 978-989-8111-60-9, SciTePress, pages 168-173. DOI: 10.5220/0001941001680173

@conference{sigmap08,
author={Lucas {D. Terissi}. and Juan {C. Gómez}.},
title={HMM INVERSION WITH FULL AND DIAGONAL COVARIANCE MATRICES FOR AUDIO-TO-VISUAL CONVERSION},
booktitle={Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2008) - SIGMAP},
year={2008},
pages={168-173},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001941001680173},
isbn={978-989-8111-60-9},
}

TY - CONF

JO - Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2008) - SIGMAP
TI - HMM INVERSION WITH FULL AND DIAGONAL COVARIANCE MATRICES FOR AUDIO-TO-VISUAL CONVERSION
SN - 978-989-8111-60-9
AU - D. Terissi, L.
AU - C. Gómez, J.
PY - 2008
SP - 168
EP - 173
DO - 10.5220/0001941001680173
PB - SciTePress

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