void SpectralNoiseSuppression::process(const MatrixXR& spectrum, MatrixXR* noise, MatrixXR* result){
const int rows = spectrum.rows();
const int cols = spectrum.cols();
(*result).resize(rows, cols);
(*result) = spectrum;
//DEBUG("SPECTRALNOISESUPPRESSION: Calculate wrapped magnitude.");
// Calculate the wrapped magnitude of the spectrum
_g = (1.0 / (_k1 - _k0 + 1.0) * spectrum.block(0, _k0, rows, _k1 - _k0).cwise().pow(1.0/3.0).rowwise().sum()).cwise().cube();
//cout << (_g) << endl;
for ( int i = 0; i < cols; i++ ) {
(*result).col(i) = (((*result).col(i).cwise() * _g.cwise().inverse()).cwise() + 1.0).cwise().log();
}
//cout << (*result) << endl;
//DEBUG("SPECTRALNOISESUPPRESSION: Estimate spectral noise.");
// Estimate spectral noise
_bands.process((*result), noise);
//DEBUG("SPECTRALNOISESUPPRESSION: Suppress spectral noise.");
// Suppress spectral noise
(*result) = ((*result) - (*noise)).cwise().clipUnder();
}
void SpectralODFPhase::phaseDeviation(const MatrixXC& spectrum, const MatrixXR& spectrumArg, MatrixXR* odfValue) {
const int rows = spectrum.rows();
const int cols = spectrum.cols();
_phaseDiff = spectrumArg.block(1, 0, rows - 1, cols) - spectrumArg.block(0, 0, rows - 1, cols);
_instFreq = _phaseDiff.block(1, 0, rows - 2, cols) - _phaseDiff.block(0, 0, rows - 2, cols);
if (_weighted)
_instFreq.array() *= spectrum.block(2, 0, rows - 2, cols).array().abs();
if (_normalize) {
(*odfValue) = _instFreq.rowwise().sum().array() / (cols * spectrum.block(2, 0, rows - 2, cols).array().abs().rowwise().sum());
return;
}
(*odfValue) = _instFreq.rowwise().sum() / cols;
return;
}
Real PitchSaliency::saliency(Real period, Real deltaPeriod, Real tLow, Real tUp, const MatrixXR& spectrum){
const int cols = spectrum.cols();
Real sum = 0.0;
for ( int m = 1; m < _numHarmonics; m++ ) {
int begin = (int)round(m * _fftSize / (period + (deltaPeriod / 2.0)));
int end = min((int)round(m * _fftSize / (period - (deltaPeriod / 2.0))), cols - 1);
if (begin < end) sum += harmonicWeight(period, tLow, tUp, m) * spectrum.block(0, begin, 1, end - begin).maxCoeff();
}
return sum;
}
