"-" symbol is wrongly inserted when referring to Tables 27 to 32

Accordingly to specification, AlfCoeffC shall be in the range of −127 to 127, inclusive.

Please find a related merge request that checks AlfCoeff values for Luma and Chroma:

​https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM/merge_requests/570

The following command lines show that the current VTM encoder may produce invalid bitstreams :

git fetch ​https://vcgit.hhi.fraunhofer.de/fbarbier/VVCSoftware_VTM.git alf_compliance_check git checkout -b fbarbier/VVCSoftware_VTM-alf_compliance_check1 FETCH_HEAD

cd build cmake .. make -j 8 cd ..

$ ./bin/EncoderAppStaticd --SourceWidth=144 --SourceHeight=192 --InputChromaFormat=420 --InputBitDepth=8 --Profile=next --FrameRate=60 --FramesToBeEncoded=1 --GOPSize=4 '--Frame1=B 1 5 -6.5 0.2590 0 0 1.0 0 0 0 4 4 -1 -5 -9 -13 0' '--Frame2=B 2 4 -6.5 0.2590 0 0 1.0 0 0 0 4 4 -1 -2 -6 -10 1 -1 5 1 1 1 0 1' '--Frame3=B 3 5 -6.5 0.2590 0 0 1.0 0 0 0 4 4 -1 -3 -7 -11 1 -1 5 0 1 1 1 1' '--Frame4=B 4 1 0.0 0.0 0 0 1.0 0 0 0 4 4 -1 -4 -8 -12 1 -1 5 0 1 1 1 1' --FastSearch=1 --MaxCUWidth=12 --MaxCUHeight=16 --CTUSize=128 --MaxPartitionDepth=5 --PCMEnabledFlag=0 --SAO=0 --LoopFilterDisable=1 --ALF=1 --DisableIntraInInter=0 --DepQuant=0 --SignHideFlag=0 --DualITree=1 --LMChroma=1 --TransformSkip=0 --MaxDeltaQP=0 --MTS=2 --Triangle=1 --RDPCM=1 -i alf_source.yuv -b alf_compliance_issue.vvc

$ ./bin/DecoderAppStaticd -b alf_compliance_issue.vvc -o decoded.yuv

ERROR: In function "alfFilter" in source/Lib/DecoderLib/VLCReader.cpp:3084: AlfCoeffC shall be in the range of −127 to 127, inclusive

The subpic slice map initialization fix in MR !1507 has broken raster-scan slice decoding when the initRectSliceMap() function is called for a picture using raster-scan slices in the parsePictureHeader() function.