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Soft decision combining for dual channel noise reduction

We present a ﬂexible dual channel noise reduction algorithm that combines the information of two microphone channels in the discrete Fourier transform domain. This algorithm can cope with substantially different signal-to-noise ratios at different time-frequency bins in both channels. The output is obtained by combining the outputs of two single channel ﬁlters and a dual channel ﬁlter weighted by the probability of speech presence. The algorithm has a low latency and does not require any additional information such as the microphone positions.