whitening.py 文件源码

def _get_whitening_matrix(self):
        Xcov = numpy.dot(self.silences.T, self.silences)/self.silences.shape[0]
        d,V  = eigh(Xcov)
        D    = numpy.diag(1./numpy.sqrt(d + self.fudge))
        self.whitening_matrix = numpy.dot(numpy.dot(V,D), V.T).astype(numpy.float32)