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arXiv 2009.05288eess.AScs.SDeess.SP
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盲源分离的广义最小失真原理

Generalized Minimal Distortion Principle for Blind Source Separation

LINE Corporation(LINE公司)

Robin Scheibler

摘要:

本文从盲源分离(BSS)的角度重新研究了源图像的估计问题。我们推广了传统的最小失真原则,最大似然估计与模型的剩余频谱。由于剩余频谱图通常包含其他来源,我们建议使用混合范数模型,让我们微调时间和频率的稀疏性。我们建议进行最小化的混合范数通过优化,导致迭代重加权最小二乘算法。该算法很好地平衡了效率和易于实现。我们评估所提出的方法的性能,适用于两个著名的确定BSS和一个联合BSS去混响算法。我们发现,它是可能的调整参数,以提高分离高达2分贝,没有增加失真,并在很小的计算成本。该方法为提高盲源分离的性能提供了一种廉价、简便的方法。

英文摘要:

We revisit the source image estimation problem from blind source separation (BSS). We generalize the traditional minimum distortion principle to maximum likelihood estimation with a model for the residual spectrograms. Because residual spectrograms typically contain other sources, we propose to use a mixed-norm model that lets us finely tune sparsity in time and frequency. We propose to carry out the minimization of the mixed-norm via majorization-minimization optimization, leading to an iteratively reweighted least-squares algorithm. The algorithm balances well efficiency and ease of implementation. We assess the performance of the proposed method as applied to two well-known determined BSS and one joint BSS-dereverberation algorithms. We find out that it is possible to tune the parameters to improve separation by up to 2 dB, with no increase in distortion, and at little computational cost. The method thus provides a cheap and easy way to boost the performance of blind source separation.

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