DADiSP Filters -Filter Functions
Filter Functions
Although most users access DADiSP/Filters through the dialog based interface, DADiSP/Filters includes over standalone 50 functions. The following table is a summary of each function
* Indicates new or improved Version 5.0 functions.
FIR Filter Functions
| bandpass | Designs a FIR linear phase bandpass filter |
| bandstop | Designs a FIR linear phase bandstop filter |
| diff | Designs a FIR differentiator |
| fastfilter | FFT based FIR filtering |
| highpass | Designs a FIR linear phase highpass filter |
| hilbert | Designs a FIR Hilbert transformer |
| kwbpass* | Designs a Kaiser window FIR bandpass filter |
| kwbstop* | Designs a Kaiser window FIR bandstop filter |
| kwhpass* | Designs a Kaiser window FIR highpass filter |
| kwlpass* | Designs a Kaiser window FIR lowpass filter |
| lowpass | Designs a FIR linear phase lowpass filter |
| remez | Creates multiband FIR linear phase filters |
IIR Filter Functions
| bessel* | Designs an IIR Bessel filter |
| butterworth | Designs an IIR Butterworth filter |
| cascade | Filters a time domain input with an IIR filter |
| cheby1 | Designs an IIR Chebychev I filter |
| cheby2 | Designs an IIR Chebychev II filter |
| elliptic | Designs an IIR Elliptical filter |
Filter Response Functions
| filtgrpdelay* | Calculates group delay of any filter |
| filtmag* | Calculates any filter magnitude response |
| filtimp* | Calculates any filter impulse response |
| filtphase* | Calculates any filter phase response |
| firmag | Calculates FIR filter magnitude response |
| firphase | Calculates FIR filter phase response |
| iirimp* | Calculates IIR filter impulse response |
| iirmag* | Calculates IIR filter magnitude response |
| iirphase* | Calculates IIR filter phase response |
Filter Coefficient Conversion Functions
| cas2dir* | Converts Cascade form to Direct form |
| dir2cas* | Converts Direct form to Cascade form |
| fir2dir* | Converts FIR impulse form to Direct form |
| fir2cas* | Converts FIR impulse form to Cascade form |
Filtering Functions
| dirfilter* | Apply Direct form filter in the time domain |
| dirfilterF* | Apply Direct form filter in the frequency domain |
| filtdataF* | Apply any filter in the frequency domain |
| filtdata* | Apply any filter in the time domain |
| firfilterF* | Apply FIR filter in the frequency domain |
| firfilter | Apply FIR filter in the time domain |
| iirfilterF* | Apply IIR filter in the frequency domain |
| iirfilter | Apply IIR filter in the time domain |
Misc Filter Functions
| filtzeros* | Calculates zeros of any filter |
| filtpoles* | Calculates poles of any filter |
| fir | Evaluates a FIR difference equation |
| firpz | Creates an FIR filter zero plot |
| firzeros | Calculates zeros of an FIR filter |
| fullfir | Converts FIR filter to full band linear phase |
| iir | Evaluates an IIR difference equation |
| iirgrpdelay* | Calculates group delay of an IIR filter |
| iirpoles | Calculates poles of an IIR filter |
| iirpz | Creates an IIR filter pole-zero plot |
| iirzeros | Calculates zeros of an IIR filter |
| polecoef | Converts IIR biquad to direct pole coeff form |
| quantize* | Quantize filter coefficients to N bits |
| zerocoef | Converts IIR biquad to direct zero coeff form |
| unwrap | Phase unwrapping using Schafer’s algorithm |
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