Intel® Integrated Performance Primitives Developer Guide and Reference

ID 790148
Date 11/07/2023
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of 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.