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Authors: Alejandro Antonio Torres García ; Carlos Alberto Reyes García and Luis Villaseñor Pineda

Affiliation: National Institute for Astrophysics Optics and Electronics, Mexico

Keyword(s): Silent Speech Interfaces (SSI), Electroencephalograms (EEG), Unspoken Speech, DiscreteWavelet Transform (DWT), Classification.

Related Ontology Subjects/Areas/Topics: Artificial Intelligence ; Biomedical Engineering ; Biomedical Signal Processing ; Data Manipulation ; Health Engineering and Technology Applications ; Human-Computer Interaction ; Methodologies and Methods ; Neurocomputing ; Neurotechnology, Electronics and Informatics ; Pattern Recognition ; Physiological Computing Systems ; Sensor Networks ; Soft Computing ; Speech Recognition ; Wavelet Transform

Abstract: This work aims to interpret the EEG signals associated with actions to imagine the pronunciation of words that belong to a reduced vocabulary without moving the articulatory muscles and without uttering any audible sound (unspoken speech). Specifically, the vocabulary reflects movements to control the cursor on the computer. We have recorded EEG signals from 21 subjects using a markers based basic protocol. The discrete wavelet transform (DWT) is used to extract features from the delimited windows, and a subset of them with frequency ranges below 32 Hz is further selected. These subsets are used to train four classifiers: Naive Bayes (NB), Random Forests (RF), support vector machine (SVM), and Bagging-RF. The results are still preliminary but encouraging because the accuracy rates are above 20%, i.e. up to chance for five classes. The implementation process as well as some experiments with their corresponding results are shown.

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Paper citation in several formats:
Antonio Torres García, A.; Alberto Reyes García, C. and Villaseñor Pineda, L. (2012). TOWARD A SILENT SPEECH INTERFACE BASED ON UNSPOKEN SPEECH. In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing (BIOSTEC 2012) - BIOSIGNALS; ISBN 978-989-8425-89-8; ISSN 2184-4305, SciTePress, pages 370-373. DOI: 10.5220/0003769603700373

@conference{biosignals12,
author={Alejandro {Antonio Torres García}. and Carlos {Alberto Reyes García}. and Luis {Villaseñor Pineda}.},
title={TOWARD A SILENT SPEECH INTERFACE BASED ON UNSPOKEN SPEECH},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing (BIOSTEC 2012) - BIOSIGNALS},
year={2012},
pages={370-373},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003769603700373},
isbn={978-989-8425-89-8},
issn={2184-4305},
}

TY - CONF

JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing (BIOSTEC 2012) - BIOSIGNALS
TI - TOWARD A SILENT SPEECH INTERFACE BASED ON UNSPOKEN SPEECH
SN - 978-989-8425-89-8
IS - 2184-4305
AU - Antonio Torres García, A.
AU - Alberto Reyes García, C.
AU - Villaseñor Pineda, L.
PY - 2012
SP - 370
EP - 373
DO - 10.5220/0003769603700373
PB - SciTePress