rtf_create_fir_bandpass(3) [debian man page]
RTF_CREATE_FIR_LOWPASS(3) rtfilter library RTF_CREATE_FIR_LOWPASS(3) NAME
rtf_create_fir_lowpass, rtf_create_fir_highpass, rtf_create_fir_bandpass - Creates FIR lowpass, highpass and bandpass windowed sinc filters SYNOPSIS
#include <rtf_common.h> hfilter rtf_create_fir_lowpass(unsigned int nch, int proctype, double fc, unsigned int hlen, KernelWindow wndtype); hfilter rtf_create_fir_highpass(unsigned int nch, int proctype, double fc, unsigned int hlen, KernelWindow wndtype); hfilter rtf_create_fir_bandpass(unsigned int nchann, int proctype, double fc_low, double fc_high, unsigned int hlen, KernelWindow wndtype); DESCRIPTION
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 nor- malized 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, HAM- MING_WINDOW or RECT_WINDOW (see a book on signal processing for details about their meaning). RETURN VALUE
Returns the handle to the created filter in case of success, NULL otherwise. SEE ALSO
rtf_create_filter(3), rtf_destroy_filter(3) EPFL
2010 RTF_CREATE_FIR_LOWPASS(3)
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RTF_CREATE_FIR_LOWPASS(3) rtfilter library RTF_CREATE_FIR_LOWPASS(3) NAME
rtf_create_fir_lowpass, rtf_create_fir_highpass, rtf_create_fir_bandpass - Creates FIR lowpass, highpass and bandpass windowed sinc filters SYNOPSIS
#include <rtf_common.h> hfilter rtf_create_fir_lowpass(unsigned int nch, int proctype, double fc, unsigned int hlen, KernelWindow wndtype); hfilter rtf_create_fir_highpass(unsigned int nch, int proctype, double fc, unsigned int hlen, KernelWindow wndtype); hfilter rtf_create_fir_bandpass(unsigned int nchann, int proctype, double fc_low, double fc_high, unsigned int hlen, KernelWindow wndtype); DESCRIPTION
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 nor- malized 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, HAM- MING_WINDOW or RECT_WINDOW (see a book on signal processing for details about their meaning). RETURN VALUE
Returns the handle to the created filter in case of success, NULL otherwise. SEE ALSO
rtf_create_filter(3), rtf_destroy_filter(3) EPFL
2010 RTF_CREATE_FIR_LOWPASS(3)