US 12,132,903 B2
Method and apparatus for processing image signal
Moonmo Koo, Seoul (KR); Mehdi Salehifar, Seoul (KR); Seunghwan Kim, Seoul (KR); and Jaehyun Lim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC, Seoul (KR)
Filed on Sep. 18, 2023, as Appl. No. 18/369,493.
Application 18/369,493 is a continuation of application No. 18/097,775, filed on Jan. 17, 2023, granted, now 11,818,352.
Application 18/097,775 is a continuation of application No. 17/360,164, filed on Jun. 28, 2021, granted, now 11,589,051, issued on Feb. 21, 2023.
Application 17/360,164 is a continuation of application No. 16/901,818, filed on Jun. 15, 2020, granted, now 11,082,694, issued on Aug. 3, 2021.
Application 16/901,818 is a continuation of application No. PCT/KR2019/011517, filed on Sep. 5, 2019.
Claims priority of provisional application 62/727,526, filed on Sep. 5, 2018.
Prior Publication US 2024/0031573 A1, Jan. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/122 (2014.01); H04N 19/167 (2014.01); H04N 19/176 (2014.01); H04N 19/61 (2014.01)
CPC H04N 19/122 (2014.11) [H04N 19/167 (2014.11); H04N 19/176 (2014.11); H04N 19/61 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A method for decoding an image signal by an apparatus, comprising:
determining an input length and an output length of a non-separable transform based on a height and a width of a current block;
determining a non-separable transform matrix related to the input length and the output length of the non-separable transform;
applying the non-separable transform matrix for coefficients of the current block, a number of the coefficients being related to the input length of the non-separable transform; and
performing primary inverse transform on the coefficients for which the non-separable transform is applied,
wherein the input length and the output length of the non-separable transform are determined separately,
wherein the size of the non-separable transform matrix is determined as one of four predefined sizes, based on the height and the width of the current block,
wherein the input length of the non-separable transform is determined as 16 and the output length of the non-separable transform is greater than the input length of the non-separable transform, based on that both the height and the width of the current block are greater than 8, and
wherein the input length of the non-separable transform is determined as 8 and the output length of the non-separable transform is greater than the input length of the non-separable transform, based on that both the height and the width of the current block are equal to 8.