Title:
TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE FOR SAME
Document Type and Number:
WIPO Patent Application WO/2021/141443
Kind Code:
A1
Abstract:
An image decoding method according to the present document may comprise a step for deriving corrected transform coefficients, wherein the step for deriving corrected transform coefficients may comprise the steps of: determining whether the tree type of the current block is a single tree; deriving a first variable and a second variable for a luma component of the current block and not deriving the first and second variables for a chroma component of the current block if the tree type is the first tree; parsing an LFNST index on the basis of the first variable and the second variable; and deriving the corrected transform coefficients by applying an LFNST kernel derived on the basis of the LFNST index.
Inventors:
KOO MOONMO (KR)
KIM SEUNGHWAN (KR)
LIM JAEHYUN (KR)
KIM SEUNGHWAN (KR)
LIM JAEHYUN (KR)
Application Number:
PCT/KR2021/000260
Publication Date:
July 15, 2021
Filing Date:
January 08, 2021
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H04N19/60; H04N19/132; H04N19/137; H04N19/18; H04N19/186; H04N19/70; H04N19/96
Domestic Patent References:
| WO2019185883A1 | 2019-10-03 |
Foreign References:
| KR20190125482A | 2019-11-06 | |||
| KR20190052008A | 2019-05-15 |
Other References:
BENJAMIN BROSS , JIANLE CHEN , SHAN LIU , YE-KUI WANG: "Versatile Video Coding (Draft 7)", 16. JVET MEETING; 20191001 - 20191011; GENEVA; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), no. JVET-P2001-vE; m51515, 14 November 2019 (2019-11-14), pages 1 - 489, XP030224330
M. KOO (LGE), M. SALEHIFAR (LGE), J. LIM (LGE), S. KIM (LGE): "Separate transform skip checking of Luma and Chroma for LFNST index signalling", 17. JVET MEETING; 20200107 - 20200117; BRUSSELS; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), no. JVET-Q0138 ; m51727, 31 December 2019 (2019-12-31), XP030222678
M. KOO (LGE), M. SALEHIFAR (LGE), J. LIM (LGE), S. KIM (LGE): "Separate transform skip checking of Luma and Chroma for LFNST index signalling", 17. JVET MEETING; 20200107 - 20200117; BRUSSELS; (THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16 ), no. JVET-Q0138 ; m51727, 31 December 2019 (2019-12-31), XP030222678
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (KR)
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