VIDEO CODING METHOD ON BASIS OF SECONDARY TRANSFORM, AND DEVICE THEREFOR

WIPO Patent Application WO/2020/145720

A1

A video transform method according to the present document is characterized by comprising: a step for receiving a quantized transform coefficient for a target block and a transform index for a non-separated secondary transform; a step for inverse-quantizing the quantized transform coefficient; a step for deriving an input transform coefficient size indicating the length of the inverse-quantized transform coefficient to which the non-separated secondary transform has been applied, an output transform coefficient size indicating the length of a modified transform coefficient to which the non-separated secondary transform has been applied, and a transform set mapped to the intra mode of the target block, when the transform index does not indicate that the non-separated secondary transform is not performed; and a step for deriving the modified transform coefficient on the basis of a matrix operation on a transform kernel matrix in the transform set indicated by the transform index, and a transform coefficient list corresponding to the input transform coefficient size.

JP3083229	[Title of Invention] Data compression method
JP2009044421	IMAGE PROCESSOR AND PROCESSING METHOD
JP4902358	Coding devices and methods, as well as programs

KOO MOONMO (KR)
LIM JAEHYUN (KR)
NAM JUNGHAK (KR)
KIM SEUNGHWAN (KR)
SALEHIFAR MEHDI (KR)

PCT/KR2020/000462

July 16, 2020

January 10, 2020

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LG ELECTRONICS INC (KR)

H04N19/60; H04N19/11; H04N19/122; H04N19/124; H04N19/17; H04N19/176; H04N19/70

KR20180063186A	2018-06-11
KR20120032457A	2012-04-05
KR20180135921A	2018-12-21
US20170238013A1	2017-08-17
KR20180041578A	2018-04-24

ENVISION PATENT & LAW FIRM (KR)

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