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We present a dual-channel noise reduction method for small mobile devices. Our method incorporates phase difference between channels into the conventional MMSE spectral amplitude estimator. It is possible to suppress unwanted directional noise signals, whose incident direction is different from that of the target speech signal. Experimental results show that the proposed method outperformed conventional...
This paper presents a novel speech enhancement method based on first-order differential microphone array (DMA) system. The enhancement algorithm is implemented in three steps. In the first step, a time-delay of arrival (TDOA) estimator is used to determine the time difference between two microphone signals, and the intrinsic delay parameter of DMA is adjusted accordingly. In the second step, DMA speech...
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