US 11,943,479 B2
Method for processing video signal by using transform, and apparatus therefor
Moonmo Koo, Seoul (KR); Jaehyun Lim, Seoul (KR); and Seunghwan Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/420,196
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jan. 2, 2020, PCT No. PCT/KR2020/000066
§ 371(c)(1), (2) Date Jul. 1, 2021,
PCT Pub. No. WO2020/141909, PCT Pub. Date Jul. 9, 2020.
Claims priority of provisional application 62/787,354, filed on Jan. 1, 2019.
Prior Publication US 2022/0070494 A1, Mar. 3, 2022
Int. Cl. H04N 19/625 (2014.01); H04N 19/105 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/625 (2014.11) [H04N 19/105 (2014.11); H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/70 (2014.11)] 13 Claims
OG exemplary drawing
 
1. A method for decoding a video signal using transform, comprising:
determining a horizontal transform type index for a horizontal transform kernel and a vertical transform type index for a vertical transform kernel of a transform block in the video signal;
determining a transform region in which a significant transform coefficient exists in the transform block based on the horizontal transform type index, the vertical transform type index, and a size of the transform block; and
applying inverse-transform to the transform region based on the horizontal transform type index and the vertical transform type index,
wherein a width of the transform region is determined as a smaller value between a width of the transform block and 16 if the horizontal transform type index is greater than 0 and determined as a smaller value between the width of the transform block and 32 if the horizontal transform type index is not greater than 0, and
wherein a height of the transform region is determined as a smaller value between a height of the transform block and 16 if the vertical transform type index is greater than 0 and determined as a smaller value between the height of the transform block and 32 if the vertical transform type index is not greater than 0.