1. A multichannel system comprising: an acquisition portion configured to acquire a multichannel signal; and a multichannel noise reduction module configured to obtain noise correlation between a plurality of channels of the multichannel signal, the multichannel noise reduction module further configured to obtain a signal characteristic in each of the plurality of channels and remove signal noise based on (i) the correlated noise and (ii) at least one of an uncorrelated noise in each channel or the obtained signal characteristic in each channel.