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Musical instrument classification using non-negative matrix factorization algorithms and subset feature selection

Benetos, E., Kotti, M. & Kotropoulos, C. (2006). Musical instrument classification using non-negative matrix factorization algorithms and subset feature selection. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, 5, pp. 221-224. ISSN 1520-6149


In this paper, a class of algorithms for automatic classification of individual musical instrument sounds is presented. Several perceptual features used in sound classification applications as well as MPEG-7 descriptors were measured for 300 sound recordings consisting of 6 different musical instrument classes. Subsets of the feature set are selected using branchand-bound search, obtaining the most suitable features for classification. A class of classifiers is developed based on the non-negative matrix factorization (NMF). The standard NMF method is examined as well as its modifications: the local, the sparse, and the discriminant NMF. The experimental results compare feature subsets of varying sizes alongside the various NMF algorithms. It has been found that a subset containing the mean and the variance of the first mel-frequency cepstral coefficient and the AudioSpectrumFlatness descriptor along with the means of the AudioSpectrumEnvelope and the AudioSpectrumSpread descriptors when is fed to a standard NMF classifier yields an accuracy exceeding 95%.

Publication Type: Conference or Workshop Item (Paper)
Additional Information: DOI: 10.1109/ICASSP.2006.1661252 © 2006 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, 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.
Publisher Keywords: cepstral analysis, classification algorithms, electronic mail, feature extraction, informatics, instruments, MPEG 7 Standard, music information retrieval, spatial databases, testing
Subjects: M Music and Books on Music > M Music
Q Science > QA Mathematics > QA76 Computer software
Departments: School of Mathematics, Computer Science & Engineering > Computer Science
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