MAJORIZATION-MINIMIZATION ALGORITHM FOR SMOOTH ITAKURA-SAITO NONNEGATIVE MATRIX FACTORIZATION
Non-negative Tensor Factorization and Blind Separation
Přednášející: Cédric Févotte, Autoři: Cédric Févotte, CNRS LTCI / Télécom ParisTech, France
Nonnegative matrix factorization (NMF) with the Itakura-Saito divergence has proven efficient for audio source separation and music transcription, where the signal power spectrogram is factored into a ``dictionary'' matrix times an ``activation'' matrix. Given the nature of audio signals it is expected that the activation coefficients exhibit smoothness along time frames. This may be enforced by penalizing the NMF objective function with an extra term reflecting smoothness of the activation coefficients. We propose a novel regularization term that solves some deficiencies of our previous work and leads to an efficient implementation using a majorization-minimization procedure.
Informace o přednášce
| Nahráno: | 2011-05-26 16:35 - 16:55, Club B |
|---|---|
| Přidáno: | 21. 6. 2011 17:20 |
| Počet zhlédnutí: | 123 |
| Rozlišení videa: | 1024x576 px, 512x288 px |
| Délka videa: | 0:23:19 |
| Audio stopa: | MP3 [7.90 MB], 0:23:19 |
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