Bitstream file name:
SUBPIC_H_HUAWEI_1.bit

Explanation of bitstream features:
sub-pictures of varying sizes. using the following  configurations,
# assuming an 832x480 input sequence with CTU size = 128x128, and split to 4 rectangular slices, each slice include one tile, and each slice is a subpicture.
# example 4 subpictures in a 832x480 picture:
#----------
#|    |   |
#|    |   |
#|----|---| 
#|    |   |
#|    |   |
#----------
NumSubPics                              : 4             # number of subpictures in a picture
SubPicCtuTopLeftX                       : 0 4 0 4       # specifies horizontal position of top left CTU of i-th subpicture in unit of CtbSizeY 
SubPicCtuTopLeftY                       : 0 0 2 2       # specifies vertical position of top left CTU of i-th subpicture in unit of CtbSizeY
SubPicWidth                             : 4 3 4 3       # specifies the width of the i-th subpicture in units of CtbSizeY
SubPicHeight                            : 2 2 2 2       # specifies the height of the i-th subpicture in units of CtbSizeY
SubPicTreatedAsPicFlag                  : 1 1 1 1       # 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 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

slice/tiles configurations are the same to the ones in subpicture_4Slice2HorSubPic.cfg


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_4Slice4SubPic.cfg -c ../cfg/per-sequence/RaceHorsesC.cfg -b SUBPIC_H_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
