AdaptiveCodebookSearch

Searches for the integer delay and the fraction delay, and computes the adaptive vector.

Syntax

IppStatus ippsAdaptiveCodebookSearch_G7291_16s(const Ipp16s pSrcAdptTarget[40], const Ipp16s pSrcImpulseResponse[40], const Ipp16s pSrcPrevExcitation[154], Ipp16s pDstDelay[2], Ipp16s lagMin, Ipp16s lagMax, int subFrame);

Parameters

pSrcAdptTarget	Pointer to the target signal for the adaptive-codebook search vector.
pSrcImpulseResponse	Pointer to the impulse response of the weighted synthesis filter vector.
pSrcPrevExcitation	Pointer to the previous and updated excitation vector.
pDstDelay	Pointer to the output integer and fraction delays vector.
lagMin	Minimum value of the searching range.
lagMax	Maximum value of the searching range.
subFrame	Subframe number, either 0 or 1.

Description

The function ippsAdaptiveCodebookSearch_G7291 are declared in the ippsc.h file. It searches for the integer delay T and the fraction delay t, using the target signal and the past filtered excitation, and computes the adaptive vector. The search is performed in the subframes subFrame.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when one of the specified pointers is NULL.
ippStsRangeErr	Indicates an error when subFrame is not equal to 0 or 1.
ippStsRangeErr	Indicates an error when lagMin is less than 20, or greater than 143 or lagMax.
ippStsRangeErr	Indicates an error when lagMax is less than 20, or greater than 143 or lagMin.