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- W4376552516 abstract "Nonnegative matrix factorization (NMF) is a popular method for audio spectral unmixing. While NMF is traditionally applied to off-the-shelf time-frequency representations based on the short-time Fourier or Cosine transforms, the ability to learn transforms from raw data attracts increasing attention. However, this adds an important computational overhead. When assumed orthogonal (like the Fourier or Cosine transforms), learning the transform yields a non-convex optimization problem on the orthogonal matrix manifold. In this paper, we derive a quasi-Newton method on the manifold using sparse approximations of the Hessian. Experiments on synthetic and real audio data show that the proposed algorithm out-performs state-of-the-art first-order and coordinate-descent methods by orders of magnitude. A Python package for fast TL-NMF is released online at https://github.com/pierreablin/tlnmf." @default.
- W4376552516 created "2023-05-16" @default.
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- W4376552516 date "2018-11-06" @default.
- W4376552516 modified "2023-09-30" @default.
- W4376552516 title "A Quasi-Newton algorithm on the orthogonal manifold for NMF with transform learning" @default.
- W4376552516 doi "https://doi.org/10.48550/arxiv.1811.02225" @default.
- W4376552516 hasPublicationYear "2018" @default.
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