dc.creator | Giannoulis P., Potamianos G., Maragos P. | en |
dc.date.accessioned | 2023-01-31T07:42:14Z | |
dc.date.available | 2023-01-31T07:42:14Z | |
dc.date.issued | 2018 | |
dc.identifier | 10.23919/EUSIPCO.2018.8553520 | |
dc.identifier.isbn | 9789082797015 | |
dc.identifier.issn | 22195491 | |
dc.identifier.uri | http://hdl.handle.net/11615/72376 | |
dc.description.abstract | In this paper, we propose two multi-channel extensions of non-negative matrix factorization (NMF) for acoustic event detection. The first method performs decision fusion on the activation matrices produced from independent single-channel sparse-NMF solutions. The second method is a novel extension of single-channel NMF, incorporating in its objective function a multi-channel reconstruction error and a multi-channel class sparsity term on the activation matrices produced. This class sparsity constraint is used to guarantee that the NMF solutions at a given time will contain only a few classes activated across all channels. This indirectly forces the channels to seek solutions on which they agree, thus increasing robustness. We evaluate the proposed methods on a multi-channel database of overlapping acoustic events and various background noises collected inside a smart office space. Both proposed methods outperform the single-channel baseline, with the second approach achieving a 15.4% relative error reduction in terms of F-score. © EURASIP 2018. | en |
dc.language.iso | en | en |
dc.source | European Signal Processing Conference | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85059800601&doi=10.23919%2fEUSIPCO.2018.8553520&partnerID=40&md5=fbed22443287a3c2388913c4d7414003 | |
dc.subject | Chemical activation | en |
dc.subject | Factorization | en |
dc.subject | Office buildings | en |
dc.subject | Signal processing | en |
dc.subject | Acoustic event detections | en |
dc.subject | Activation matrices | en |
dc.subject | Background noise | en |
dc.subject | Multi channel | en |
dc.subject | Nonnegative matrix factorization | en |
dc.subject | Objective functions | en |
dc.subject | Reconstruction error | en |
dc.subject | Sparsity constraints | en |
dc.subject | Matrix algebra | en |
dc.subject | European Signal Processing Conference, EUSIPCO | en |
dc.title | Multi-channel non-negative matrix factorization for overlapped acoustic event detection | en |
dc.type | conferenceItem | en |