Independent component analysis: algorithms and applications
Neural Networks
Speech signal enhancement through adaptive wavelet thresholding
Speech Communication
Blind source separation combining independent component analysis and beamforming
EURASIP Journal on Applied Signal Processing
IEEE Transactions on Information Technology in Biomedicine - Special section on affective and pervasive computing for healthcare
Computing linear transforms of symbolic signals
IEEE Transactions on Signal Processing
Information extraction from sound for medical telemonitoring
IEEE Transactions on Information Technology in Biomedicine
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Despite recent advances in the area of home telemonitoring, the challenge of automatically detecting the sound signatures of activities of daily living of an elderly patient using nonintrusive and reliable methods remains. This paper investigates the classification of eight typical sounds of daily life from arbitrarily positioned two-microphone sensors under realistic noisy conditions. In particular, the role of several source separation and sound activity detection methods is considered. Evaluations on a new four-microphone database collected under four realistic noise conditions reveal that effective sound activity detection can produce significant gains in classification accuracy and that further gains can be made using source separation methods based on independent component analysis. Encouragingly, the results show that recognition accuracies in the range 70%-100% can be consistently obtained using different microphone-pair positions, under all but the most severe noise conditions.