ShapeEnvelopFrequency

Performs the shaping of the frequency envelope of the excitation signal.

Syntax

IppStatus ippsShapeEnvelopFrequency_G7291_16s(const Ipp16s pSrc[208], const Ipp16s pSrcEnvelopFreq[12], Ipp16s pDst[80], Ipp16s pDstFilterCoeffs[33], Ipp16s pMem[32]);

Parameters

pSrc	Pointer to the excitation input signal.
pSrcEnvelopFreq	Pointer to the input desired frequency envelope.
pDst	Pointer to the shaped output signal.
pDstFilterCoeffs	Pointer to the filtering coefficients of the frequency envelope shaping.
pMem	Pointer to the memory supplied for frequency envelope parameters.

Description

The function ippsShapeEnvelopFrequency_G7291 is declared in the ippsc.h file. The shaping of the frequency envelope of the excitation signal utilizes the decode frequency envelope parameters to obtain a signal with a frequency envelope which is near-identical to the frequency envelope of the encoder side higher-band signal. See [ITU7291] section 7.2.4.

Return Values

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