AdaptiveCodebookSearch

Performs the adaptive codebook search.

Syntax

IppStatus ippsAdaptiveCodebookSearch_AMRWBE_16s(const Ipp16s* pSrcAdptTarget, const Ipp16s* pSrcImpulseResponse, const Ipp16s* pSrcOpenLoopLag, Ipp16s* pPitchLag, Ipp16s* pPitchLagBounds, Ipp16s* pSrcDstExcitation, Ipp16s* pFracPitchLag, Ipp16s* pAdptIndex, int subFrame, IppSpchBitRate mode, Ipp16s pitchOffset);

Parameters

pSrcAdptTarget	Pointer to the 64-element adaptive target signal vector.
pSrcImpulseResponse	Pointer to the 64-element impulse response of the weighted synthesis filter.
pSrcOpenLoopLag	Pointer to a two-element vector of the OLP lags.
pPitchLag	Pointer to the output previous integral pitch lag.
pPitchLagBounds	Pointer to the bounds of the output previous integral pitch lag.
pSrcDstExcitation	Pointer to the input/output 321-element excitation vector.
pFracPitchLag	Pointer to the output fractional pitch lag obtained during the adaptive codebook search.
pAdptIndex	Pointer to the coded closed-loop pitch index.
subFrame	Subframe number.
mode	Coder mode.
pitchOffset	Offset for the pitch adjustment, value range (-17, 17).

Description

The ippsAdaptiveCodebookSearch_AMRWBE function is declared in ippsc.h file. This function is the extension of the function ippsAdaptiveCodebookSearch_AMRWB. The pitchOffset parameter controls the adjustment of the search ranges. If value of pitchOffset = 0, both functions are identical.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when one of the specified pointer is NULL.
ippStsSizeErr	Indicates an error when pitchOffset is out of the range (-17, 17), or when mode has an illegal value.