rtf_create_fir_lowpass, rtf_create_fir_highpass, rtf_create_fir_bandpass - Creates FIR lowpass, highpass

rtf_create_fir_lowpass() creates a lowpass windowed sinc filter processing nchann channels of  data  type
       specified by proctype with fc as normalized cutoff frequency and hlen as the half length of the window.

       rtf_create_fir_highpass() is the same as rtf_create_fir_lowpass() but creates a highpass filter.

       rtf_create_fir_bandpass()  is  the  same  but  creates  a  bandpass  filter  with  fc_low  and fc_high as
       respectively the lowpass and highpass normalized cutoff frequencies.

       A normalized frequency is the ratio between the absolute frequency and the  sampling  frequency  (i.e.  a
       value of 1.0 refers to the sampling frequency).

       The  parameter  proctype  has the same meaning as in rtf_create_filter(3). Refers to its manpage for more
       details.

       The parameter wndtype specifies the type of window applied to the  impulse  response  and  can  take  the
       following  values:  BLACKMAN_WINDOW,  HAMMING_WINDOW  or RECT_WINDOW (see a book on signal processing for
       details about their meaning).

       rtf_create_fir_lowpass,  rtf_create_fir_highpass, rtf_create_fir_bandpass - Creates FIR lowpass, highpass
       and bandpass windowed sinc filters

       Returns the handle to the created filter in case of success, NULL otherwise.

rtf_create_filter(3), rtf_destroy_filter(3)

EPFL                                                  2010                             RTF_CREATE_FIR_LOWPASS(3)

#include<rtf_common.h>hfilterrtf_create_fir_lowpass(unsignedintnch,intproctype,doublefc,unsignedinthlen,KernelWindowwndtype);hfilterrtf_create_fir_highpass(unsignedintnch,intproctype,doublefc,unsignedinthlen,KernelWindowwndtype);hfilterrtf_create_fir_bandpass(unsignedintnchann,intproctype,doublefc_low,doublefc_high,unsignedinthlen,KernelWindowwndtype);