Phase and level difference fusion for robust multichannel source separation

Inter-channel phase (IPD) and level (ILD) differences are common features in multichannel source separation algorithms like DUET and MENUET. However, their utility depends strongly on the configuration of the array and what microphone pairs are used to calculate them. IPDs are most useful when extracted from microphones that are close together as this avoids spatial aliasing. In contrast, ILD clusters are only well separated for widely spaced microphones. We investigate this trade-off between IPD and ILD features and propose a method to best combine them for multichannel source separation. Experimental results demonstrate the utility of this approach.

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