QuantInv_MPEG2

Performs inverse quantization for non-intra frames according to MPEG-2 standard.

Syntax

IppStatus ippiQuantInv_MPEG2_16s_C1I(Ipp16s* pSrcDst, int QP, Ipp16s* pQPMatrix);

Parameters

pSrcDst	Pointer to the start of the block.
QP	Quantizer read from the bit stream.
pQPMatrix	Pointer to the quantizing matrix imposed by MPEG standard or user-defined.

Description

This function is declared in the ippvc.h header file. The function ippiQuantInv_MPEG2_16s_C1I multiplies the DCT coefficients from pSrcDst by QP and by corresponding values from pQPMatrix and sends the result back to pSrcDst.

Return Values

ippStsNoErr	Indicates no error.
ippStsNullPtrErr	Indicates an error when at least one input pointer is NULL.