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17th Meeting: Brussels, January 2020 2020-01-14 08:51
On clarification of applicable conditions of DMVR and BDOF
Authors: Takeshi Chujoh Sharp Tomonori Hashimoto Sharp E. Sasaki Sharp Tomohiro Ikai Sharp
Abstract
One of the applicable conditions of DMVR and BDOF is that luminance coefficients and offsets for weighted prediction do not exist for both L0 and L1 reference indexes. However, when any luminance coefficient does not exist and some chroma coefficients exist, the applicable conditions of DMVR and BDOF are not clear. There are bugs of both text and software, In this contribution, add a condition that chroma coefficients and offsets for weighted prediction do not exist for both L0 and L1 reference indexes. The changes are to add only one line to the applicable condition of both DMVR and BDOF. There is no change of experimental results on CTC. There were negligible differences for fade sequences when WeightedPredB on VTM-7.0 is set to 1. If the chroma weighted prediction is not constrained, the bugs of text and software should be fixed.
Meeting Notes
JVET-Q0128 On clarification of applicable conditions of DMVR and BDOF [T. Chujoh, T. Hashimoto, E. Sasaki, T. Ikai (Sharp)]
References:
JVET-L0201 JVET-O2010 JVET-P2001
Cited:
JVET-Q0589 X JVET-Q2001 JVET-R0002 JVET-R0013 JVET-R0060 JVET-R0081 JVET-R0082 JVET-R0141 JVET-R0142 JVET-R0208 JVET-R0218 JVET-R0219 JVET-R0305 JVET-R0350 JVET-R0370 JVET-R0392 JVET-R0481 JVET-R2001 JVET-S0013 JVET-S0052 more than 20
PATENTS:
US12418674B2 0.34 2025-09-16 JP7752799B2 0.32 2025-10-10 WO2024155106A1 0.30 2024-07-25 JP7541096B2 0.30 2024-08-27 JP2021048514A 0.28 2021-03-25 US12314437B2 0.28 2025-05-27 JP7466907B2 0.26 2024-04-15 JP7650386B2 0.23 2025-03-24
ARCHIVE v3 :
JVET-Q0128-bugfix-v2.docx JVET-Q0128-spec.docx JVET-Q0128-v3.docx JVET-Q0128-v3.pdf JVET-Q0128_black-fade_ctc vs. wpm0.xlsm JVET-Q0128_black-fade_ctc vs. wpm4.xlsm JVET-Q0128_black-fade_wpm0 vs. propsal.xlsm JVET-Q0128_black-fade_wpm4 vs. proposal.xlsm JVET-Q0128_white-fade_ctc vs. wpm0.xlsm JVET-Q0128_white-fade_ctc vs. wpm4.xlsm JVET-Q0128_white-fade_wpm0 vs. proposal.xlsm JVET-Q0128_white-fade_wpm4 vs. proposal.xlsm
Decisions
JVET-Q0128 On clarification of applicable conditions of DMVR and BDOF [T. Chujoh, T. Hashimoto, E. Sasaki, T. Ikai (Sharp)]
Citation