VE7UWU/sdrangel
1
0
Fork 0
mirror of https://github.com/f4exb/sdrangel.git synced 2026-05-28 02:57:00 -04:00
Code Issues Projects Releases Wiki Activity

Freq Scanner voice squelch: voice pitch validation (1)

Browse Source
This commit is contained in:
f4exb 2026-02-15 21:41:58 +01:00
parent 65e999f842
commit 8107bd102f
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
plugins/channelrx/freqscanner/freqscannersink.cpp
View File

@ -495,6 +495,27 @@ Real FreqScannerSink::voiceActivityLevel(int bin, int channelBins, bool isLSB) c
if (broadPeakCount >= 2)
{
// Check if signal is properly centered (not off-tune by 1 kHz or more)
// For correctly tuned voice, first formant (F1) should be 300-1000 Hz from carrier
// If mistuned by 1 kHz, F1 would appear at 1300-2000 Hz
int carrierBin = isLSB ? endBin : startBin;
bool hasLowFormant = false;
for (int p = 0; p < peakBins.size(); p++)
{
float freqOffset = std::abs(peakBins[p] - carrierBin) * binBW;
// Check if at least one broad peak is in F1 range (300-1000 Hz)
if (freqOffset >= 300.0 && freqOffset <= 1000.0) {
hasLowFormant = true;
break;
}
}
// If no formants in low range, signal is likely mistuned by >1 kHz
if (!hasLowFormant) {
return 0.0;
}
// Base score from number of broad peaks
score = std::min(broadPeakCount / 4.0f, 1.0f);