Module hbf

Half-band filters and cascades

Used to perform very efficient high-dynamic range rate changes by powers of two.

Structs

HbfDec

Half band decimator (decimate by two)

HbfDecCascade

Half-band decimation filter cascade with optimal taps

HbfInt

Half band interpolator (interpolation rate 2)

HbfIntCascade

Half-band interpolation filter cascade with optimal taps.

SymFir

Symmetric FIR filter prototype.

Constants

HBF_CASCADE_BLOCK

Max low-rate block size (HbfIntCascade input, HbfDecCascade output)

HBF_PASSBAND

Passband width in units of lowest sample rate

HBF_TAPS

140 dB stopband, 2 µdB passband ripple, limited by f32 dynamic rangeotherwise like HBF_TAPS_98.

HBF_TAPS_98

Standard/optimal half-band filter cascade taps

Traits

Filter

Filter input items into output items.