Title:
IMAGE CODING METHOD AND APPARATUS THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/220528
Kind Code:
A1
Abstract:
An image decoding method according to this document comprises a step of deriving, for transform coefficients, modified transform coefficients on the basis of inverse secondary transform, wherein: the step of deriving the modified transform coefficients may comprise a step of deriving a transform kernel to be applied to the inverse secondary transform; on the basis of both the horizontal and vertical lengths of a target block being greater than or equal to 8 and the horizontal or vertical length being 8, the transform kernel may be set to a 64 x 32 matrix; and on the basis of both the horizontal and vertical lengths of the target block being 8, a 64 x 16 matrix sampled from the 64 x 32 matrix may be applied to the inverse secondary transform of the target block.
Inventors:
KOO MOONMO (KR)
KIM SEUNGHWAN (KR)
LIM JAEHYUN (KR)
KIM SEUNGHWAN (KR)
LIM JAEHYUN (KR)
Application Number:
PCT/KR2022/005250
Publication Date:
October 20, 2022
Filing Date:
April 12, 2022
Export Citation:
Assignee:
LG ELECTRONICS INC (KR)
International Classes:
H04N19/60; H04N19/122; H04N19/129; H04N19/132; H04N19/176; H04N19/18; H04N19/593
Foreign References:
| KR20210019108A | 2021-02-19 | |||
| KR20210002106A | 2021-01-06 | |||
| KR20210033858A | 2021-03-29 | |||
| KR20200144511A | 2020-12-29 | |||
| KR20200132766A | 2020-11-25 |
Attorney, Agent or Firm:
ENVISION PATENT & LAW FIRM (KR)
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