Title:
DMVR-BASED INTER-PREDICTION METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/184848
Kind Code:
A1
Abstract:
An image decoding method according to the present document comprises: acquiring, from a bitstream, luma weight L0 flag information indicating whether there is an L0 prediction-related weight factor and luma weight L1 flag information indicating whether there is an L1 prediction-related weight factor; determining to apply decoder-side motion vector refinement (DMVR) to an L0 motion vector and L1 motion vector for a current block, when the luma weight L0 flag information and the luma weight L1 flag information are both zero; when it has been determined to apply DMVR, deriving a refined L0 motion vector and a refined L1 motion vector by applying the DMVR to the current block; deriving prediction samples for the current block on the basis of L0 prediction using the refined L0 motion vector and L1 prediction using the refined L1 motion vector; and generating reconstruction samples for the current block on the basis of the prediction samples.
Inventors:
PARK NAERI (KR)
NAM JUNGHAK (KR)
JANG HYEONGMOON (KR)
NAM JUNGHAK (KR)
JANG HYEONGMOON (KR)
Application Number:
PCT/KR2020/001861
Publication Date:
September 17, 2020
Filing Date:
February 11, 2020
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H04N19/513; H04N19/132; H04N19/186; H04N19/577; H04N19/70
Domestic Patent References:
| WO2018231700A1 | 2018-12-20 | |||
| WO2019039322A1 | 2019-02-28 | |||
| WO2018092868A1 | 2018-05-24 |
Foreign References:
| KR20190008224A | 2019-01-23 | |||
| KR20180107761A | 2018-10-02 |
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (KR)
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