QuantInv

Performs inverse quantization on a block.

Syntax

IppStatus ippiQuantInv_DV_16s_C1I(Ipp16s* pSrcDst, Ipp16s* pDequantTable);

Parameters

pSrcDst	Pointer to the block.
pDequantTable	Pointer to the dequantization table.

Description

This function is declared in the ippvc.h header file. The function ippiQuantInv_DV_16s_C1I performs inverse quantization on a block. Each of the decoded DCT coefficients in the block should be inverse quantized through multiplying by a corresponding value from the weighting matrix and division on 2¹⁴. Selection of dequantization table depends of the block type.

See Example "Inverse Quantization Tables" and Example "ippiQuantInv_DV_16s_C1I Usage" for an example of the function usage.

This function is used in the DV decoder included into Intel IPP Samples. See introduction to DV.

Return Values

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