/// <summary>
/// Constructor
/// </summary>
/// <param name="options">LPC options</param>
public LpcExtractor(LpcOptions options) : base(options)
{
_order = options.LpcOrder;
FeatureCount = _order + 1;
_blockSize = MathUtils.NextPowerOfTwo(2 * FrameSize - 1);
_convolver = new Convolver(_blockSize);
_reversed = new float[FrameSize];
_cc = new float[_blockSize];
}
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
var ofd = new OpenFileDialog();
if (ofd.ShowDialog() != DialogResult.OK)
{
return;
}
using (var stream = new FileStream(ofd.FileName, FileMode.Open))
{
var waveFile = new WaveFile(stream);
_signal = waveFile[Channels.Left];
}
_fft = new RealFft(512);
var options = new LpcOptions
{
SamplingRate = _signal.SamplingRate,
LpcOrder = 16,
FrameDuration = FrameDuration,
HopDuration = HopDuration
};
var lpcExtractor = new LpcExtractor(options);
//var lpcExtractor = new LpccExtractor(options);
//var lpcExtractor = new PlpExtractor(_signal.SamplingRate, 10,
// lpcOrder: 8,
// rasta: 0.94,
// filterbankSize: 20,
// //lifterSize: 22,
// window: WindowTypes.Hann);
_lpcVectors = lpcExtractor.ParallelComputeFrom(_signal);
FillFeaturesList(_lpcVectors, lpcExtractor.FeatureDescriptions, lpcExtractor.TimeMarkers(_lpcVectors.Count));
lpcListView.Items[0].Selected = true;
spectrumPanel.Line = ComputeSpectrum(0);
spectrumPanel.Markline = EstimateSpectrum(0);
spectrumPanel.ToDecibel();
lpcPanel.Line = _lpcVectors[0].Skip(1).ToArray();
}
