public DefaultSpectrogramConfig()
{
Overlap = 64;
WdftSize = 2048;
FrequencyRange = new FrequencyRange { Min = 318, Max = 2000 };
LogBase = 2;
LogBins = 32;
ImageLength = 128;
UseDynamicLogBase = false;
NormalizeSignal = false;
Stride = new IncrementalStaticStride(5115, ImageLength * Overlap);
}
public DefaultFingerprintingConfiguration()
{
FingerprintLength = 128;
Overlap = 64;
SamplesPerFingerprint = FingerprintLength * Overlap;
WdftSize = 2048;
MinFrequency = 318;
MaxFrequency = 2000;
TopWavelets = 200;
SampleRate = 5512;
LogBase = 2;
Stride = new IncrementalStaticStride(5115, FingerprintLength * Overlap);
LogBins = 32;
NormalizeSignal = false;
UseDynamicLogBase = false;
}
public void IncrementalStaticStrideTest()
{
IncrementalStaticStride incrementalStatic = new IncrementalStaticStride(5115);
Assert.AreEqual(5115 - 8192, incrementalStatic.NextStride);
}
public void IncrementalStaticStrideTest()
{
IncrementalStaticStride incrementalStatic = new IncrementalStaticStride(5115, SamplesPerFingerprint);
Assert.AreEqual(5115 - SamplesPerFingerprint, incrementalStatic.GetNextStride());
}
public void CutLogarithmizedSpectrumWithAnIncrementalStaticStride()
{
var stride = new IncrementalStaticStride(new DefaultFingerprintConfiguration().SamplesPerFingerprint / 2, new DefaultFingerprintConfiguration().SamplesPerFingerprint, 0);
var config = new CustomSpectrogramConfig { Stride = stride };
int logSpectrumLength = (config.ImageLength * 24) + config.Overlap;
var logSpectrum = GetLogSpectrum(logSpectrumLength);
var cutLogarithmizedSpectrum = spectrumService.CutLogarithmizedSpectrum(logSpectrum, SampleRate, config);
Assert.AreEqual(48, cutLogarithmizedSpectrum.Count);
double lengthOfOneFingerprint = (double)config.ImageLength * config.Overlap / SampleRate;
for (int i = 0; i < cutLogarithmizedSpectrum.Count; i++)
{
Assert.IsTrue(System.Math.Abs(cutLogarithmizedSpectrum[i].Timestamp - (i * lengthOfOneFingerprint / 2)) < Epsilon);
}
}
public void CutLogarithmizedSpectrumWithAnIncrementalStaticStride()
{
DefaultFingerprintConfiguration config = new DefaultFingerprintConfiguration();
int logSpectrumLength = (config.FingerprintLength * 24) + config.Overlap;
var stride = new IncrementalStaticStride(config.SamplesPerFingerprint / 2, config.SamplesPerFingerprint, 0);
var logSpectrum = new float[logSpectrumLength][];
for (int i = 0; i < logSpectrumLength; i++)
{
logSpectrum[i] = new float[32];
}
var cutLogarithmizedSpectrum = spectrumService.CutLogarithmizedSpectrum(logSpectrum, stride, config.FingerprintLength, config.Overlap);
Assert.AreEqual(48, cutLogarithmizedSpectrum.Count);
}
