Bitstream file name:
SUBPIC_I_HUAWEI_1.bit

Explanation of bitstream features:
mix of independent and non-independent subpictures. 
compared to SUBPIC_I_HUAWEI_1, SubPicTreatedAsPicFlag is set to 0 for the 2nd and 3rd subpictures
using the following  configurations,

# example 2 tiles, 3 subpictures (and each subpicture is a slice) in a 832x480 picture:
#----------
#|    |   |
#|    |   |-->this subpic is not treated as picture
#|    |---|
#|    |   |-->this subpic is not treated as picture
#|    |   |
#----------
#     |
#     v
# vertically divided into 2 tile, the second tile include two subpicture/slices

SubPicInfoPresentFlag                  	: 1             # subpicture information present flag(0: OFF, 1: ON)
NumSubPics                              : 3             # number of subpictures in a picture
SubPicCtuTopLeftX                     	: 0 4 4         # specifies horizontal position of top left CTU of i-th subpicture in unit of CtbSizeY 
SubPicCtuTopLeftY                       : 0 0 2         # specifies vertical position of top left CTU of i-th subpicture in unit of CtbSizeY
SubPicWidth                             : 4 3 3         # specifies the width of the i-th subpicture in units of CtbSizeY
SubPicHeight                            : 4 2 2         # specifies the height of the i-th subpicture in units of CtbSizeY
SubPicTreatedAsPicFlag                  : 1 0 0         # equal to 1 specifies that the i-th subpicture of each coded picture in the CLVS is treated as a picture in the decoding process excluding in-loop filtering operations
LoopFilterAcrossSubpicEnabledFlag       : 0 0 0         # equal to 1 specifies that in-loop filtering operations may be performed across the boundaries of the i-th subpicture in each coded picture in the CLVS
SubPicIdMappingExplicitlySignalledFlag  : 0             # equal to 1 specifies that the subpicture ID mapping is explicitly signalled, either in the SPS or in the PPSs
SubPicIdMappingInSpsFlag                : 0             # specifies that subpicture ID mapping is signalled in the SPS(0: OFF, 1: ON)
SubPicIdLen                             : 0             # the number of bits used to represent the syntax element sps_subpic_id[ i ]
SubPicId                                : 0             # subpicture ID of the i-th subpicture


Profile, tier, and level for the bitstream:
Main 10 profile, Main tier, Level 3.0


Max picture width and height, and any additional picture width and height values used (i.e., for reference picture resample or scalability):
SourceWidth=832
SourceHeight=480

Picture rate:
FrameRate = 30 


The bitstream can be decoded using VVC software, at Merge request https://vcgit.hhi.fraunhofer.de/jvet/VVCSoftware_VTM/-/merge_requests/1509
will be soon merged in master branch, with commit: 10937a6b1bdeb7daf77e5f8b71e20798aa71ad5f
VTM-8.0 is not used because tile/slice implementation has a bug.

The bitstream has been generated using this VVC software encoder cmd: 
EncoderApp.exe -c ../cfg/encoder_randomaccess_vtm.cfg -c ../cfg/nonCTC-SliceConfigExamples/subpicture_3Slice2TilesDependent.cfg -c ../cfg/per-sequence/RaceHorsesC.cfg -b SUBPIC_J_HUAWEI_1.bit -q 37 -f 5 -i /d/testseqs/HEVC/ClassC/RaceHorses_832x480_30.yuv --SEIDecodedPictureHash=1

Contact name and email of bitstream submitter:
Biao Wang
biao.wang@huawei.com
