Applies the post filter to multiple samples.
Syntax
IppStatus ippsPostFilter_G728_16s (Ipp16s gl, Ipp16s glb, Ipp16s kp, Ipp16s tiltz, const Ipp16s* pCoeffs, const Ipp16s* pSrc, Ipp16s* pDst, IppsPostFilterState_G728_16s* pMem);
Parameters
gl |
The LTP scaling factor. |
glb |
The LTP product term. |
kp |
The LTP lag, pitch period of the current frame. |
tiltz |
The STP tilt-compensation coefficient. |
pCoeffs |
Pointer to the post filter coefficients vector [20]: B1, ..., B10, A1 , ..., A10. |
pSrc |
Pointer to the input speech vector [5]; elements -kp ,...,-1 must be given as memory of the LTP filter. |
pDst |
Pointer to the output post-filtered speech vector [5]. |
pMem |
Pointer to the post filter state structure. |
Description
The function ippsPostFilter_G728 is declared in ippsc.h file. This function performs filtering of input samples by one at a time according to the transfer function that is comprised of LTP filter and STP filter parts:
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when one of the specified pointer is NULL. |