*** EE6 anchor code is intended for coding HDR/WCG  video *******
it contains luma adaptive QP technology by Sharp and chroma QP scaling by Ericsson used in MPEG-HDR anchor3.2. Refer JCTVC-W0054 for details.  

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//           Chroma QP scaling                                     ////
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Changes related to chroma QP scaling are under ERICSSON_CHROMA_QPSCALE

## example config parameters. They are already included in the per-sequence config files

WCGPPSChromaQpScale                 : -0.46       # Linear chroma QP offset mapping (scale) based on QP
WCGPPSChromaQpOffset                : 9.26        # Linear chroma QP offset mapping (offset) based on QP
WCGPPSCbQpScale                     : 1.14        # Scale factor depending on capture and representation color space
WCGPPSCrQpScale                     : 1.79        # Scale factor depending on capture and representation color space 


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/// Luma adaptive QP control  with explicit delta QP signalling  ////
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Changes related to luma adaptive QP with explicit delta QP signalling are under macros starting with   SHARP_

### example config parameters 1: enable luma adaptive delta QP at CTU level
###
LumaLevelToDeltaQPMode        : 1           # Luma activity based deltaQP control  -- 0: disabled;  1: send dQP
MaxCuDQPDepth                 : 0           # Max depth of delta QP, should be less than MaxPartitionDepth

### example config parameters 2: enable luma adaptive delta QP at CU level of depth 3
LumaLevelToDeltaQPMode        : 1           # Luma activity based deltaQP control  -- 0: disabled;  1: send dQP;
MaxCuDQPDepth                 : 1           # Max depth of delta QP, should be less than MaxPartitionDepth
isSDR                         : 1           # 1 (default): SDR in PQ2100 container,   0: HDR

Note: the per-sequence config files have been modifed to use the converted SDR files, ChromaQpScale etc. parameters.

Related Macros:
(1) #define SHARP_LUMA_DELTA_QP                1            ///< enable luma adaptive QP, only intended for HDR or SDR data in ST-2084 

There are two default LUT table defined in the code,  parameter isSDR specified in sequence config file is used to select which LUT is used. 
This is also used to get the correct weight to compute the WPSNR inside the code. The LUT table can also be input from a file through command line or config file parameter LumaDQPFile

(3) 
#define SHARP_WEIGHT_DISTORTION              1            ///< use weighted distortion in RD decision
#define SHARP_WEIGHT_DISTORTION_OUTPUT       1            ///< printout weighted PSNR

To make RD decision align with the luma adaptive QP adjustment, JVET-C0095 proposed a weighted PSNR metric.
They are incorporated into encoder RD decision, and are enabled by the above macros.
The weighted PSNR is printed out in the encoder log file as:

WPSNR SUMMARY---------------------------------------------------
	Total Frames |   Bitrate     Y-PSNR    U-PSNR    V-PSNR    YUV-PSNR
        7    w     210.9357   36.6616   40.2324   40.4726   37.5797


(4) #define SHARP_DQP_BIT_STAT                  1             ///< for decoder output frame bits and deltaQP bits count
For deltaQP overhead esimate, enable macro #SHARP_DQP_BIT_STAT  and run TAppDecoderAnalyserStatic 
this makes decoder to output total bit usage and deltaQP bits per frame, and average % used by deltaQP bits.

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/// data conversion                                              ////
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directory "convert" contains script used for converting CTC SDR sequences to SDR in ST-2084/BT2100 container using HDRTools.