2 ms·
If anyone ever runs out of precision using IIR filters: convert to second-order section (SOS). I stumbled upon this trick a few years ago and it's a game chang
by willis936 5y ago
If anyone ever runs out of precision using IIR filters: convert to second-order section (SOS). I stumbled upon this trick a few years ago and it's a game changer. No need for FIR.
- mochomocha 5y agoYep. The other advantages are that now you can parallelize compute, and you get lower latency.
- hcrisp 5y agoI found the same. I once computed a high-order (something like 100) low-pass Butterworth using SOS sections as a test and did not notice any instability in the filtered signal. The key was to directly derive the SOS coefficients using bilinear transformation.