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• W67160382 abstract "We consider the problem of blind separation of sources from a set of their linear mixtures. It was discovered recently, that exploiting the sparsity of sources, appropriately represented according to some signal dictionary, dramatically improves the quality of separation. In this study we take advantage of the properties of multiscale transforms, such as wavelet or wavelet packets, to decompose signals into sets of local features with various degrees of sparsity. We study how the separation error is affected by the sparsity of decomposition coefficients, and by the misfit between the probabilistic model of these coefficients and their actual distribution. Our error estimator, based on the Taylor expansion of the quasi-ML function, is used in selection of the best subsets of coefficients, utilized in turn for further separation. The performance of the algorithm is verified on noise-free and noisy data. Experiments with simulated signals, musical sounds and images demonstrate significant improvement of separation quality over previously reported results." @default.
• W67160382 created "2016-06-24" @default.
• W67160382 creator A5028565537 @default.
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• W67160382 date "2003-01-01" @default.
• W67160382 modified "2023-09-27" @default.
• W67160382 title "Multiscale Framework For Blind Source Separation" @default.
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