Title:
MOTION PREDICTION-BASED IMAGE DECODING METHOD AND APPARATUS USING MERGE CANDIDATE LIST IN IMAGE CODING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/050695
Kind Code:
A1
Abstract:
A method by which a decoding apparatus performs image decoding, according to the present document, comprises the steps of: forming a candidate list for deriving motion information in a sub-block unit for a current block, wherein the merge candidate list includes constructed candidates; deriving control point motion vectors (CPMVs) for control points (CPs) of the current block on the basis of the merge candidate list; deriving prediction samples for the current block on the basis of the CPMVs; and generating a reconstructed picture for the current block on the basis of the derived prediction samples, wherein the constructed candidates are derived on the basis of a combination of at least two from among a first neighboring block in a first group, a second neighboring block in a second group, and a third neighboring block and a fourth neighboring block in a third group, and the first neighboring block, the second neighboring block, the third neighboring block, and the fourth neighboring block included in the combination have the same reference picture index.
Inventors:
LEE JAEHO (KR)
KIM SEUNGHWAN (KR)
KIM SEUNGHWAN (KR)
Application Number:
PCT/KR2019/011580
Publication Date:
March 12, 2020
Filing Date:
September 06, 2019
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H04N19/139; H04N19/132; H04N19/176; H04N19/70
Domestic Patent References:
| WO2018128379A1 | 2018-07-12 | |||
| WO2017156705A1 | 2017-09-21 |
Foreign References:
| US20180192069A1 | 2018-07-05 | |||
| KR20180061025A | 2018-06-07 |
Other References:
HAITAO YANG: "Description of Core Experiment 4 (CE4): Inter prediction and motion vector coding", JVET-K1024-V2, JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, 11TH MEETING, 9 August 2018 (2018-08-09), Ljubljana, SI, pages 1 - 45, XP030193529
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (KR)
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