US 11,729,425 B2
Method for encoding/decoding video signals and apparatus therefor
Moonmo Koo, Seoul (KR); Seunghwan Kim, Seoul (KR); Mehdi Salehifar, Seoul (KR); and Jaehyun Lim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Dec. 15, 2021, as Appl. No. 17/551,794.
Application 17/551,794 is a continuation of application No. 17/209,854, filed on Mar. 23, 2021, granted, now 11,336,920.
Application 17/209,854 is a continuation of application No. PCT/KR2019/012352, filed on Sep. 23, 2019.
Claims priority of provisional application 62/735,152, filed on Sep. 23, 2018.
Prior Publication US 2022/0109879 A1, Apr. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/625 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/625 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/70 (2014.11)] 15 Claims
OG exemplary drawing
 
1. A method for decoding a video signal, comprising:
deriving transform kernels being applied to a current block, wherein the transform kernels include a horizontal transform kernel and a vertical transform kernel;
determining a non-zero region to which an inverse transform is applied within the current block based on the transform kernels and a width and/or a height of the current block;
performing the inverse transform on the non-zero region based on the transform kernels,
wherein the determining of the non-zero region comprises:
determining whether each of the transform kernels corresponds to a predefined transform kernel; and
determining a region having a predefined width and/or a predefined height as the non-zero region based on (i) the determination of whether each of the transform kernels corresponds to the predefined transform kernel, and (ii) the width and/or the height of the current block,
wherein the method further comprises:
obtaining syntax elements related to a position of a last significant coefficient in scanning order within the current block,
wherein coefficients to which the inverse transform is applied are obtained from the video signal based on the position of the last significant coefficient, and
wherein the syntax elements are binarized based on a size which is equal to a size of the non-zero region.