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Accounting for phase cancellations in non-negative matrix factorization using weighted distances

Ewert, S, Plumbley, MD and Sandler, M (2014) Accounting for phase cancellations in non-negative matrix factorization using weighted distances In: Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).

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Abstract

Techniques based on non-negative matrix factorization (NMF) have been successfully used to decompose a spectrogram of a music recording into a dictionary of templates and activations. While advanced NMF variants often yield robust signal models, there are usually some inaccuracies in the factorization since the underlying methods are not prepared for phase cancellations that occur when sounds with similar frequency are mixed. In this paper, we present a novel method that takes phase cancellations into account to refine dictionaries learned by NMF-based methods. Our approach exploits the fact that advanced NMF methods are often robust enough to provide information about how sound sources interact in a spectrogram, where they overlap, and thus where phase cancellations could occur. Using this information, the distances used in NMF are weighted entry-wise to attenuate the influence of regions with phase cancellations. Experiments on full-length, polyphonic piano recordings indicate that our method can be successfully used to refine NMF-based dictionaries.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Vision Speech and Signal Processing
Authors :
AuthorsEmailORCID
Ewert, SUNSPECIFIEDUNSPECIFIED
Plumbley, MDUNSPECIFIEDUNSPECIFIED
Sandler, MUNSPECIFIEDUNSPECIFIED
Date : May 2014
Identification Number : 10.1109/ICASSP.2014.6853676
Additional Information : Copyright 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Depositing User : Symplectic Elements
Date Deposited : 22 Apr 2015 15:56
Last Modified : 09 May 2015 13:33
URI: http://epubs.surrey.ac.uk/id/eprint/807423

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