AVS

This section describes video coding functions for encoding, decoding, processing and presenting of digital audio-video in accordance with AVS ([AVS]) standard. These functions apply to high and standard resolution of digital broadcast, laser digital media storage, broadband network streaming and multimedia communication etc.

The following enumeration is used to indicate prediction modes of the Intra_8x8 prediction process for luma samples (9.8.2 of [AVS]):

typedef enum {   IPP_8x8_VERT    = 0,  
               		IPP_8x8_HOR      = 1,
               		IPP_8x8_DC       = 2,
              		 IPP_8x8_DIAG_DL  = 3,
               		IPP_8x8_DIAG_DR  = 4,
             } IppIntra8x8PredMode_AVS;

The table below shows the correspondence between prediction modes and constants of enum IppIntra8x8PredMode_AVS.


Name of Constant	Prediction Mode	Chapter in AVS
IPP_8x8_VERT	Intra_8x8_Vertical	9.8
IPP_8x8_HOR	Intra_8x8_Horizontal	9.8
IPP_8x8_DC	Intra_8x8_DC	9.8
IPP_8x8_DIAG_DL	Intra_8x8_Diagonal_Down_Left	9.8
IPP_8x8_DIAG_DR	Intra_8x8_Diagonal_Down_Right	9.8

The following enumeration is used to indicate prediction modes of the intra prediction process for chroma samples (9.8.3 of AVS):

typedef enum {   IPP_CHROMA_DC    = 0,  
               		IPP_CHROMA_HOR   = 1,
               		IPP_CHROMA_VERT  = 2,
              		 IPP_CHROMA_PLANE = 3,
              } IppIntraChromaPredMode_AVS;

The table below shows the correspondence between prediction modes and constants of enum IppIntraChromaPredMode_AVS.


Name of Constant	Prediction Mode	Chapter in AVS
IPP_CHROMA_DC	Intra_Chroma_DC	9.8
IPP_CHROMA_HOR	Intra_Chroma_Horizontal	9.8
IPP_CHROMA_VERT	Intra_Chroma_Vertical	9.8
IPP_CHROMA_PLANE	Intra_Chroma_Plane	9.8

AVS Decoder Functions
Function Short Name	Description
Entropy Decoding
DecodeLumaBlockIntra_AVS	Decodes luminance coefficients of an intra block.
DecodeLumaBlockInter_AVS	Decodes luminance coefficients of an inter block.
DecodeChromaBlock_AVS	Decodes chrominance coefficients of a block.
Inter Prediction
InterpolateLumaBlock_AVS	Performs interpolation for motion estimation of the luma component.
WeightPrediction_AVS	Applies weighting process to a predicted block.
Macroblock Reconstruction
ReconstructLumaIntra_AVS	Reconstructs intra luma macroblock.
ReconstructLumaInter_AVS	Reconstructs inter luma macroblock.
ReconstructChromaIntra_AVS	Reconstructs intra chroma macroblock.
ReconstructChromaInter_AVS	Reconstructs inter chroma macroblock.
Deblocking Filtering
FilterDeblockingLuma_VerEdge_AVS	Performs deblocking filtering on the vertical edges of the luma 16x16 macroblock.
FilterDeblockingLuma_HorEdge_AVS	Performs deblocking filtering on the horizontal edges of the luma 16x16 macroblock.
FilterDeblockingChroma_VerEdge_AVS	Performs deblocking filtering on the vertical edges of the chroma 8x8 macroblock.
FilterDeblockingChroma_HorEdge_AVS	Performs deblocking filtering on the horizontal edges of the chroma 8x8 macroblock.

AVS Encoder Functions
Function Short Name	Description
Forward Transform and Quantization
TransformQuant8x8Fwd_AVS	Performs forward transform and quantization for 8X8 residual blocks.
Macroblock Disassembling
DisassembleLumaIntra_AVS	Disassembles intra luma macroblocks.
DisassembleChroma420Intra_AVS	Disassembles intra chroma macroblocks.