LPCInverseFilter_G728

Computes the LPC prediction residual.

Syntax

IppStatus ippsLPCInverseFilter_G728_16s (const Ipp16s* pSrcSpeech, const Ipp16s* pCoeffs, Ipp16s* pDstResidual, IppsPostFilterAdapterState_G728* pMem);

Parameters

pSrcSpeech

Pointer to the quantized speech buffer [-240...0...4].

pCoeffs

Pointer to the 10 th-order LPC filter coefficients [10].

pDstResidual

Pointer to the LPC prediction residual vector [-140...0...99].

pMem

Pointer to the postfilter adapter memory.

Description

The function ippsLPCInverseFilter_G728_16s is declared in ippsc.h file. This function computes the LPC prediction residual vector for the current decoded speech vector. The 10th-order LPC inverse filter implements the following function:



Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error when at least one of the specified pointers is NULL.

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