AdaptiveCodebookContribution

Updates target vector for codebook search by subtracting adaptive codebook contribution.

Syntax

IppStatus ippsAdaptiveCodebookContribution_G729_16s (Ipp16s gain, const Ipp16s* pFltAdptVector, const Ipp16s* pSrcAdptTarget, Ipp16s* pDstAdptTarget);

IppStatus ippsAdaptiveCodebookContribution_G729_32f (Ipp32f gain, const Ipp32f* pFltAdptVector, const Ipp32f* pSrcAdptTarget, Ipp32f* pDstAdptTarget);

Parameters

gain	Adaptive codebook gain g_p.
pFltAdptVector	Pointer to the input filtered adaptive codebook vector y( n).
pSrcAdptTarget	Pointer to the input target vector x(n).
pDstAdptTarget	Pointer to the output updated target vector x'( n).

Description

The function ippsAdaptiveCodebookContribution_G729 is declared in the ippsc.h file. This function subtracts the adaptive codebook contribution from the target signal and stores updated target vector as follows:

x'( n) = x(n) - g_p * y( n) , n = 0,..., 39

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when one of the specified pointers is NULL.