公开(公告)号：US20230131478A1

公开(公告)日：2023-04-27

申请号：US18086422

申请日：2022-12-21

Applicant: LG ELECTRONICS INC.

Inventor： Moonmo KOO ,  Seunghwan Kim ,  Jeehyun Lim

IPC: H04N19/61 ,  H04N19/105 ,  H04N19/122 ,  H04N19/127 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/186 ,  H04N19/169

Abstract: A video decoding method according to the present document comprises a step of deriving a modified transform coefficient, and the step of deriving the transform coefficient may comprise the steps of: determining whether an LFNST can be applied to the height and width of a current block on the basis of the tree type and color format of the current block; parsing an LFNST index if the LFNST can be applied; and deriving the modified transform coefficient on the basis of the LFNST index and an LFNST matrix.