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In this paper, an improved nonnegative matrix factorization (NMF) algorithm is proposed for single channel blind source separation and applied to speech enhancement. By adding time correlation item to objective function to constrain the time-varying gain coefficients of noise, it can achieve better effect of speech enhancement. We propose an efficient algorithm to optimize objective function with...
In this paper, the local generalized Gaussian mixture model (LGGMM) is proposed to blindly separate speech signals in reverberation environment. First, time delay and attenuation ratio of speech signal to the microphone array are estimated by detection of single source points. Second, by using LGGMM to determine the dominant sources at every time-frequency point, the speech signals are separated....
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