Computes a shape-constrained FIR filter using the covariance method.
Syntax
IppStatus ippsFIRGenMidBand_AMRWBE_16s(const Ipp16s* pSrcSignal, const Ipp16s* pSrcSideSignal, Ipp16s* pTaps);
Parameters
pSrcSignal |
Pointer to the source signal, [-8...319]. |
pSrcSideSignal |
Pointer to the real side signal [320]. |
pTaps |
Pointer to the FIR coefficients of length [9]. |
Description
The function ippsFIRGenMidBand_AMRWBE is declared in ippsc.h file. This function computes a shape-constrained FIR filter minimizing the expression:
The filter coefficients are computed with the covariance method using a modified Cholesky algorithm.
See also 3GPP TS 26.290: “Extended AMR Wideband Speech Codec; Transcoding functions", clauses 5.5.2.3 [AMRWB+].
Return Values
ippStsNoErr |
Indicates no error. |
ippStsNullPtrErr |
Indicates an error when one of the specified pointer is NULL. |