MPEG-4

This section contains functions for encoding and decoding of video data according to ISO/IEC 14496-2 MPEG-4 standard (see [ISO14496A]).

The use of some functions described in this section is demonstrated in Intel® IPP Samples downloadable from http://www.intel.com/cd/software/products/asmo-na/eng/220046.htm .

MPEG-4 Video Decoder Functions
Function Short Name	Description
Motion Compensation
Copy8x8QP_MPEG4, Copy16x8QP_MPEG4, Copy16x16QP_MPEG4	Copy a block with quarter-pixel accuracy.
OBMC8x8HP_MPEG4, OBMC16x16HP_MPEG4, OBMC8x8QP_MPEG4	Perform the overlapped block motion compensation (OBMC).
Sprite and Global Motion Compensation
WarpInit_MPEG4	Initializes IppiWarpSpec_MPEG4 structure for further usage in GMC or Sprite reconstruction.
WarpGetSize_MPEG4	Returns size of IppiWarpSpec_MPEG4 structure.
WarpLuma_MPEG4	Warps arbitrary rectangular luminance region.
WarpChroma_MPEG4	Warps arbitrary rectangular chrominance region.
CalcGlobalMV_MPEG4	Calculates Global Motion Vector for one macroblock.
ChangeSpriteBrightness_MPEG4	Change brightness after sprite warping.
Inverse Quantization
QuantInvIntraInit_MPEG4, QuantInvInterInit_MPEG4	Initialize specification structures for QuantInvIntra_MPEG4 and QuantInvInter_MPEG4 respectively.
QuantInvIntraGetSize_MPEG4, QuantInvInterGetSize_MPEG4	Return the size of the initialized specification structures.
QuantInvIntra_MPEG4, QuantInvInter_MPEG4	Perform inverse quantization on intra/inter coded block.
VLC Decoding
DecodeDCIntra_MPEG4	Decodes one DC coefficient for intra coded block.
DecodeCoeffsIntra_MPEG4	Decodes DCT coefficients for intra coded block.
DecodeCoeffsIntraRVLCBack_MPEG4	Decodes DCT coefficients in backward direction for intra coded block using RVLC.
DecodeCoeffsInter_MPEG4	Decodes DCT coefficients for inter coded block.
DecodeCoeffsInterRVLCBack_MPEG4	Decodes DCT coefficients in backward direction for inter coded block using RVLC.
ReconstructCoeffsInter_MPEG4	Decodes DCT coefficients, performs inverse scan and inverse quantization for inter coded block.
Postprocessing
FilterDeblocking8x8HorEdge_MPEG4, FilterDeblocking8x8VerEdge_MPEG4	Perform deblocking filtering on a horizontal or vertical edge of two adjacent blocks.
FilterDeringingThreshold_MPEG4	Computes threshold values for the deringing filtering through a macroblock.
FilterDeringingSmooth8x8_MPEG4	Performs deringing filtering of a block.

MPEG-4 Video Encoder Functions
Function Short Name	Description
Quantization
QuantIntraInit_MPEG4, QuantInterInit_MPEG4	Initialize specification structures for QuantIntra_MPEG4 and QuantInter_MPEG4 respectively.
QuantIntraGetSize_MPEG4, QuantInterGetSize_MPEG4	Return the size of the initialized specification structures.
QuantIntra_MPEG4, QuantInter_MPEG4	Perform quantization on intra/inter coded block.
VLC Encoding
EncodeDCIntra_MPEG4	Encodes one DC coefficient for intra coded block.
EncodeCoeffsIntra_MPEG4	Encodes DCT coefficients for intra coded block.
EncodeCoeffsInter_MPEG4	Encodes DCT coefficients for inter coded block.