Skip to content
Snippets Groups Projects
Commit 4f150191 authored by Frank Bossen's avatar Frank Bossen
Browse files

Modify chroma QP mapping table 

Chroma QP mapping tables are modified such that the relationship
between luma PSNR an chroma PSNR is on average closer to the
one observed with HM 16.20.
The net effect is that bits are shifted from chroma to luma and
BD-rate differences between VTM and HM are most consistent across
components.

BD-rate between VTM 8.0 and HM 16.20:
AI: -24.09% -31.32% -32.82%
RA: -34.84% -46.33% -46.91%
LB: -30.02% -42.62% -40.94%
LP: -33.12% -44.28% -42.80%

BD-rate between VTM 8.0 plus this change and HM 16.20:
AI: -24.99% -25.35% -26.86%
RA: -35.76% -39.04% -40.03%
LB: -30.56% -32.89% -30.77%
LP: -33.62% -34.86% -32.56%
parent f3cf8232
No related branches found
No related tags found
No related merge requests found
Hide whitespace changes
Inline Side-by-side
cfg/encoder_intra_vtm.cfg
+ 2
− 2
View file @ 4f150191
......@@ -56,8 +56,8 @@ SEIDecodedPictureHash : 0
CbQpOffset : 0
CrQpOffset : 0
SameCQPTablesForAllChroma : 1
QpInValCb : 1 31 43
QpOutValCb : 1 32 41
QpInValCb : 17 27 32 44
QpOutValCb : 17 29 34 41
TemporalSubsampleRatio : 8
ReWriteParamSets : 1
......
cfg/encoder_lowdelay_P_vtm.cfg
+ 2
− 2
View file @ 4f150191
......@@ -82,8 +82,8 @@ SEIDecodedPictureHash : 0
CbQpOffset : 0
CrQpOffset : 0
SameCQPTablesForAllChroma : 1
QpInValCb : 32 44
QpOutValCb : 32 41
QpInValCb : 17 22 34 42
QpOutValCb : 17 23 35 39
ReWriteParamSets : 1
#============ NEXT ====================
......
cfg/encoder_lowdelay_vtm.cfg
+ 2
− 2
View file @ 4f150191
......@@ -82,8 +82,8 @@ SEIDecodedPictureHash : 0
CbQpOffset : 0
CrQpOffset : 0
SameCQPTablesForAllChroma : 1
QpInValCb : 32 44
QpOutValCb : 32 41
QpInValCb : 17 22 34 42
QpOutValCb : 17 23 35 39
ReWriteParamSets : 1
#============ NEXT ====================
......
cfg/encoder_randomaccess_vtm.cfg
+ 2
− 2
View file @ 4f150191
......@@ -93,8 +93,8 @@ SEIDecodedPictureHash : 0
CbQpOffset : 0
CrQpOffset : 0
SameCQPTablesForAllChroma : 1
QpInValCb : 32 44
QpOutValCb : 32 41
QpInValCb : 17 22 34 42
QpOutValCb : 17 23 35 39
ReWriteParamSets : 1
#============ NEXT ====================
......
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment