US 12,149,742 B2
Video signal processing method and apparatus using secondary transform
Jaehong Jung, Seoul (KR); Juhyung Son, Uiwang-si (KR); Dongcheol Kim, Suwon-si (KR); Geonjung Ko, Seoul (KR); and Jinsam Kwak, Uiwang-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jun. 27, 2023, as Appl. No. 18/341,983.
Application 18/341,983 is a continuation of application No. 17/716,956, filed on Apr. 8, 2022, granted, now 11,736,729.
Application 17/716,956 is a continuation of application No. 17/088,110, filed on Nov. 3, 2020, granted, now 11,330,302, issued on May 10, 2022.
Application 17/088,110 is a continuation of application No. PCT/KR2020/008301, filed on Jun. 25, 2020.
Claims priority of application No. 10-2019-0075438 (KR), filed on Jun. 25, 2019; application No. 10-2019-0080390 (KR), filed on Jul. 3, 2019; and application No. 10-2019-0081763 (KR), filed on Jul. 7, 2019.
Prior Publication US 2023/0345049 A1, Oct. 26, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/61 (2014.01); H04N 19/132 (2014.01); H04N 19/176 (2014.01); H04N 19/18 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/61 (2014.11) [H04N 19/132 (2014.11); H04N 19/176 (2014.11); H04N 19/18 (2014.11); H04N 19/70 (2014.11)] 15 Claims
OG exemplary drawing
 
1. A video decoding method, the method performed by an apparatus and comprising:
obtaining syntax information related to a secondary transform of a coding unit;
determining whether or not the secondary transform is applied to a transform block included in the coding unit based on the obtained syntax information;
obtaining one or more inverse transform coefficients based on the secondary transform when the secondary transform is applied to the transform block; and
obtaining a residual sample for the transform block based on the one or more inverse transform coefficients,
wherein the secondary transform is low frequency non-separable transform (LFNST),
wherein the syntax information is obtained when one or more conditions are satisfied,
wherein a first condition of the one or more conditions is that an index of a last significant coefficient according to a preset scan order in a sub-block is greater than a preset value,
wherein a second condition of the one or more conditions is that a height of the transform block and a width of the transform block are equal to or greater than 4, and
wherein the sub-block is a sub-block having sub-block index 0 according to the preset scan order in the transform block.