Title:
IMAGE CODING METHOD AND DEVICE ON BASIS OF WIDE-ANGLE INTRA PREDICTION AND TRANSFORM
Document Type and Number:
WIPO Patent Application WO/2020/242183
Kind Code:
A1
Abstract:
An image decoding method according to the present document comprises the steps of: obtaining intra prediction mode information and an LFNST index; deriving an intra prediction mode of a current block on the basis of intra prediction mode information; when wide-angle intra prediction is applied to the current block, deriving a modified intra prediction mode by means of intra prediction mode remapping; deciding an LFNST set comprising LFNST matrices on the basis of the modified intra prediction mode; selecting one of the LFNST matrices on the basis of the LFNST set and LFNST index; and deriving transform coefficients for the current block on the basis of the selected LFNST matrix.
Inventors:
KOO MOONMO (KR)
LIM JAEHYUN (KR)
NAM JUNGHAK (KR)
KIM SEUNGHWAN (KR)
LIM JAEHYUN (KR)
NAM JUNGHAK (KR)
KIM SEUNGHWAN (KR)
Application Number:
PCT/KR2020/006827
Publication Date:
December 03, 2020
Filing Date:
May 27, 2020
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H04N19/11; H04N19/119; H04N19/132; H04N19/176; H04N19/186; H04N19/593; H04N19/70
Foreign References:
| KR20190045885A | 2019-05-03 | |||
| KR20190003950A | 2019-01-10 | |||
| KR20180063187A | 2018-06-11 | |||
| US20190149822A1 | 2019-05-16 |
Other References:
KOO, MOONMO ET AL.: "CE6: Reduced Secondary Transform (RST) (CE6-3.1", JVET-N0193. JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 14TH MEETING, 27 March 2019 (2019-03-27), Geneva, CH, XP002795960
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (KR)
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