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DV serial: use HP filter before interpolation and LP filter. Set HP -3dB corner at 300 Hz (for 8 kHz sampling rate)

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This commit is contained in:
f4exb
2018-06-24 02:29:54 +02:00
parent 39bb65a198
commit 175e4ca98a
4 changed files with 52 additions and 44 deletions
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sdrbase/dsp/filtermbe.cpp
+12 -2
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@@ -20,8 +20,8 @@
const float MBEAudioInterpolatorFilter::m_lpa[3] = {1.0, 1.392667E+00, -5.474446E-01};
const float MBEAudioInterpolatorFilter::m_lpb[3] = {3.869430E-02, 7.738860E-02, 3.869430E-02};
const float MBEAudioInterpolatorFilter::m_hpa[3] = {1.000000e+00, 1.955578e+00, -9.565437e-01};
const float MBEAudioInterpolatorFilter::m_hpb[3] = {9.780305e-01, -1.956061e+00, 9.780305e-01};
const float MBEAudioInterpolatorFilter::m_hpa[3] = {1.000000e+00, 1.667871e+00, -7.156964e-01};
const float MBEAudioInterpolatorFilter::m_hpb[3] = {8.459039e-01, -1.691760e+00, 8.459039e-01};
MBEAudioInterpolatorFilter::MBEAudioInterpolatorFilter() :
m_filterLP(m_lpa, m_lpb),
@@ -37,3 +37,13 @@ float MBEAudioInterpolatorFilter::run(const float& sample)
{
return m_useHP ? m_filterLP.run(m_filterHP.run(sample)) : m_filterLP.run(sample);
}
float MBEAudioInterpolatorFilter::runHP(const float& sample)
{
return m_filterHP.run(sample);
}
float MBEAudioInterpolatorFilter::runLP(const float& sample)
{
return m_filterLP.run(sample);
}