US 12,413,761 B2
Video decoding method and apparatus using multi-core transform, and video encoding method and apparatus using multi-core transform
Ki-ho Choi, Seoul (KR); Min-soo Park, Seoul (KR); and Elena Alshina, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on May 6, 2024, as Appl. No. 18/656,205.
Application 18/656,205 is a continuation of application No. 18/094,805, filed on Jan. 9, 2023, granted, now 12,003,750.
Application 18/094,805 is a continuation of application No. 16/613,184, granted, now 11,589,066, issued on Feb. 21, 2023, previously published as PCT/KR2018/007506, filed on Jul. 3, 2018.
Claims priority of provisional application 62/528,483, filed on Jul. 4, 2017.
Prior Publication US 2024/0292014 A1, Aug. 29, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/44 (2014.01); H04N 19/122 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01)
CPC H04N 19/45 (2014.11) [H04N 19/122 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A video decoding method comprising:
obtaining, from a bitstream, information about a multi-core transformation according to a size of a current block and whether a specific tool is applied or not, the information about the multi-core transformation indicating which transform kernel set among a plurality of transform kernel sets is to be applied, wherein the transform kernel set includes a horizontal transform kernel for inverse transformation of the current block in a horizontal direction and a vertical transform kernel for inverse transformation of the current block in a vertical direction;
determining the horizontal transform kernel and the vertical transform kernel according to the information about the multi-core transformation;
obtaining transform coefficients of the current block by performing an inverse-quantization on quantized transform coefficients of the current block; and
performing the inverse transformation on the transform coefficients of the current block by using the horizontal transform kernel and the vertical transform kernel.