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Considering the problem that the typical MCRA (Minima-Controlled Recursive Averaging) noise estimate algorithm fails to update the power spectrum of noise effectively when the speech is present, so this paper proposes a noise estimate algorithm based on minima controlled GARCH model. The noise signal is modeled as a GARCH process in time-frequency domain and then the proposed noise estimate algorithm is achieved combined with the basis of the framework of MCRA method. Experimental and testing results indicate that the proposed algorithm can estimate the spectrum of noise more accurately compared with the reference methods. When the proposed algorithm is applied into speech enhancement, a better performance can be achieved as well. © 2016, Chinese Institute of Electronics. All right reserved.
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