AdaptiveCodebookSearch

Searches for the adaptive codebook index and the lag, and computes the adaptive vector.

Syntax

IppStatus ippsAdaptiveCodebookSearch_RTA_32f(const Ipp32f* pSrcAdptTarget, const Ipp32f* pSrcImpulseResponse, int subFrameSize, const Ipp32f* pSrcBoundary[4], Ipp32f* pSrcDstExc[372], Ipp32f* pSrcDstLag, int* pDstAdptIndex, Ipp32f* pDstAdptContribution, int deltaSearchRange, int searchFlag);

Parameters

pSrcAdptTarget	Pointer to the input target signal [subFrameSize].
pSrcImpulseResponse	Pointer to the input impulse response [subFrameSize].
subFrameSize	Size of the subframe.
pSrcBoundary	Pointer to the input adaptive codebook search boundary.
pSrcDstExc	Pointer to the input/output excitation buffer.
pSrcDstLag	Pointer to the input/output lag.
pDstAdptIndex	Pointer to the output adaptive codebook search index.
pDstAdptContribution	Pointer to the output adaptive codebook search contribution [subFrameSize].
deltaSearchRange	Delta search range value.
searchFlag	Search flag, possible values: 0 - full search. 1 - search around OLP.

Description

The function ippsAdaptiveCodebookSearch_RTA is declared in the ippsc.h file.

This function searches for the adaptive codebook index and the lag, using the target signal and the past filtered excitation, and computes the adaptive vector. The result is applied to the subframe.

Return Values

ippStsNoErr	Indicates no error.
IppStsNullPtrErr	Indicates an error when one of the specified pointers is NULL.
IppStsSizeErr	Indicates an error when subFrameSize is less than or equal to 0; or searchFlag is not equal to 0 or 1.