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Authors: Toshiki Iso and Kenichi Yamazaki

Affiliation: Network Laboratories, NTT DoCoMo, Inc., Japan

Keyword(s): Context extraction, sensors, cell phone, wavelet packet, Kohonen self-organizing map, ubiquitous service, accelerometer.

Related Ontology Subjects/Areas/Topics: Design and Implementation of Signal Processing Systems ; Multidimensional Signal Processing ; Multimedia ; Multimedia Signal Processing ; Multimedia Systems and Applications ; Telecommunications

Abstract: To realize ubiquitous services such as presence services and health care services, we propose an algorithm to extract ”personal user context” such as user’s behavior; it processes information gathered by a three-axis accelerometer mounted on a cell phone. Our algorithm has two main functions; one is to extract feature vectors by analyzing sensor data in detail by wavelet packet decomposition. The other is to flexibly cluster personal user context by combining a self-organizing algorithm with Bayesian theory. A prototype that implements the algorithm is constructed. Experiments on the prototype show that the algorithm can identify personal user contexts such as walking, running, going up/down stairs, and walking fast with an accuracy of about 88[%].

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Paper citation in several formats:
Iso, T. and Yamazaki, K. (2006). EXTRACTING PERSONAL USER CONTEXT WITH A THREE-AXIS SENSOR MOUNTED ON A FREELY CARRIED CELL PHONE. In Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2006) - SIGMAP; ISBN 978-972-8865-64-1, SciTePress, pages 224-231. DOI: 10.5220/0001568902240231

@conference{sigmap06,
author={Toshiki Iso. and Kenichi Yamazaki.},
title={EXTRACTING PERSONAL USER CONTEXT WITH A THREE-AXIS SENSOR MOUNTED ON A FREELY CARRIED CELL PHONE},
booktitle={Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2006) - SIGMAP},
year={2006},
pages={224-231},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001568902240231},
isbn={978-972-8865-64-1},
}

TY - CONF

JO - Proceedings of the International Conference on Signal Processing and Multimedia Applications (ICETE 2006) - SIGMAP
TI - EXTRACTING PERSONAL USER CONTEXT WITH A THREE-AXIS SENSOR MOUNTED ON A FREELY CARRIED CELL PHONE
SN - 978-972-8865-64-1
AU - Iso, T.
AU - Yamazaki, K.
PY - 2006
SP - 224
EP - 231
DO - 10.5220/0001568902240231
PB - SciTePress