发明名称 |
Method and system for reducing dimensionality of the spectrogram of a signal produced by a number of independent processes |
摘要 |
Embodiments of the invention disclose a system and a method for reducing a dimensionality of a spectrogram matrix. The method constructs an intermediate time basis matrix and an intermediate frequency basis matrix and applies iteratively a non-negative matrix factorization (NMF) to the intermediate time basis matrix and the intermediate frequency basis matrix until a termination condition is reached, wherein the NMF is subject to a constraint on a an independence regularization term, wherein the constraint is in a form of a gradient of the term.
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申请公布号 |
EP2312576(A2) |
申请公布日期 |
2011.04.20 |
申请号 |
EP20100010084 |
申请日期 |
2010.09.21 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
WILSON, KEVIN W.;RAMAKRISHNAN, BHIKSHA R. |
分类号 |
G10L11/00 |
主分类号 |
G10L11/00 |
代理机构 |
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地址 |
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