rtf_get_type(3) [debian man page]

RTF_GET_TYPE(3) 						 rtfilter library						   RTF_GET_TYPE(3)

NAME

       rtf_get_type - Gets the input or output data type of a filter

SYNOPSIS

       #include <rtfilter.h>

       int rtf_get_type(hfilter filt, int in);

DESCRIPTION

       This function returns the data type of the input or output of the filter filt depending on in. If in is zero, then the returned type is the
       output data type. If in is non-zero, the function returns the input data type of the filter.

       In case of the success, the returned type will be one of the constants (RTF_FLOAT, RTF_DOUBLE, RTF_CFLOAT or RTF_CDOUBLE)  defined  in  the
       man page of rtf_create_filter(3).

RETURN VALUE

       Returns the requested data type in case of success, -1 otherwise.

SEE ALSO

       rtf_create_filter(3)

EPFL
								       2010							   RTF_GET_TYPE(3)

RTF_CREATE_BANDPASS_ANALYTIC(3) 				 rtfilter library				   RTF_CREATE_BANDPASS_ANALYTIC(3)

NAME

       rtf_create_bandpass_analytic - Creates an IIR filter estimating the analytic signal in a bandpass.

SYNOPSIS

       #include <rtf_common.h>

       hfilter rtf_create_bandpass_analytic(unsigned int nch, int proctype,
					    double fl, double fh,
					    unsigned int num_pole);

DESCRIPTION

       rtf_create_chebychev()  creates a IIR chebychev filter processing nch channels of data type specified by proctype. The output of the filter
       is the analytic signal of the bandpassed data between the normalized frequencies fl and fh. The num_pole parameter specifies the number	of
       poles of the Chebychev filter used as the basis of the analytic filter.

       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 Z-transform of this filter has complex coefficients. So like rtf_create_filter(3) the created filter will output complex values keeping
       the precision specified by proctype.

       It  is  important  to  note  that  this	filter can quickly become unstable as the number of pole specified increased. Please refers to the
       authors of the library to know the stability domain (TODO: provides the stability domain here)

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_BANDPASS_ANALYTIC(3)