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In this paper, independent component analysis (ICA) in a subband domain has been extended into a feed-forward network. The feed-forward network maximizes mutual independence of separated current frames using information from the both current and previous multi-channel frames of speech signals captured by a microphone array. To guide into a proper separation preventing permutation and arbitrary scaling,...
This paper investigates multichannel speech enhancement for colocated microphone recordings based on Independent Component Analysis (ICA). Comparisons are made between co-located microphone arrays that contain microphones with mixed polar responses with traditional uniform linear arrays formed from omni-directional microphones. It is shown that polar responses of the microphones are a key factor in...
This letter aims at complementing previous empirical work regarding a certain beamforming technique for blind speech extraction that uses a local quadratic approximation of a Kurtosis expression. It is shown here that the proposed method possesses a fixed-point property which means that it remains at an optimal solution once this solution has been reached. The proposed method's fixed-point property...
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