Voice activity detection apparatus and method
A voice activity detection and voice activity technology, applied in the field of signal processing, can solve problems such as system performance degradation and inaccurate indication
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[0046] These and other aspects of the invention will be further described below by way of example with reference to the accompanying drawings.
[0047] In the statistical model used in the present invention (also described in Cho et al.), by testing two hypotheses, H 0 and H 1 , to make a voice activity determination, where, H 0 indicates the absence of speech, while H 1 Indicates the presence of speech.
[0048] The statistical model assumes that each spectral component of speech and noise has a complex Gaussian distribution, where the noise is additive and uncorrelated with speech. Based on this assumption, given H 0,k and H 1,k , noise spectral component (noisy spectral component) X k The conditional probability density function (PDF) of is as follows:
[0049] P ( X k | H 0 , k ...
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