Developer Reference

  • 2020
  • 10/21/2020
  • Public Content
Contents

FIRGenHighpass

Computes highpass FIR filter coefficients.

Syntax

IppStatus ippsFIRGenHighpass_64f(Ipp64f
rFreq
, Ipp64f*
pTaps
, int
tapsLen
, IppWinType
winType
, IppBool
doNormal
, Ipp8u*
pBuffer
);
Include Files
ipps.h
Domain Dependencies
Headers:
ippcore.h
,
ippvm.h
Libraries:
ippcore.lib
,
ippvm.lib
Parameters
rFreq
Normalized cutoff frequency, must be in the range (0, 0.5).
pTaps
Pointer to the array where computed tap values are stored. The number of elements in the array is
tapsLen
.
tapsLen
Number of elements in the array containing the tap values; must be equal or greater than 5.
winType
Specifies what type of window is used in computations. The
winType
must have one of the following values:
ippWinBartlett
Bartlett window;
ippWinBlackman
Blackman window;
ippWinHamming
Hamming window;
ippWinHann
Hann window.
doNormal
Specifies normalized or non-normalized sequence of the filter coefficients is computed. The
doNormal
must have one of the following values:
ippTrue
The function computes normalized sequence of coefficients.
ippFalse
The function computes non-normalized sequence of coefficients.
pBuffer
Pointer to the buffer for internal calculations. To get the size of the buffer, use the
ippsFIRGenGetBufferSize
function.
Description
This function computes
tapsLen
coefficients for highpass FIR filter the cutoff frequency
rFreq
by windowing the ideal infinite filter coefficients. The parameter
winType
specifies the type of the window. For more information on window types used by the function, see Windowing Functions.he computed coefficients are stored in the array
pTaps
.
Return Values
ippStsNoErr
Indicates no error.
ippStsNullPtrErr
Indicates an error when the
pTaps
pointer is
NULL
.
ippStsSizeErr
Indicates an error when the
tapsLen
is less than 5, or
rFreq
is out of the range.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.