US 12,457,350 B2
Method and device for video coding using various transform techniques
Yong Jo Ahn, Seoul (KR); and Ho Chan Ryu, Seoul (KR)
Assigned to INTELLECTUAL DISCOVERY CO., LTD., Seoul (KR)
Filed by INTELLECTUAL DISCOVERY CO., LTD., Seoul (KR)
Filed on Jun. 14, 2024, as Appl. No. 18/743,832.
Application 18/743,832 is a continuation of application No. 18/472,915, filed on Sep. 22, 2023, granted, now 12,047,594.
Application 18/472,915 is a continuation of application No. 17/491,955, filed on Oct. 1, 2021, granted, now 11,991,378, issued on May 21, 2024.
Application 17/491,955 is a continuation of application No. 16/962,730, granted, now 11,166,039, issued on Nov. 2, 2021, previously published as PCT/KR2019/000603, filed on Jan. 15, 2019.
Claims priority of application No. 10-2018-0005898 (KR), filed on Jan. 17, 2018.
Prior Publication US 2024/0333955 A1, Oct. 3, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/60 (2014.01); H04N 19/136 (2014.01); H04N 19/184 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/136 (2014.11); H04N 19/184 (2014.11); H04N 19/45 (2014.11); H04N 19/60 (2014.11)] 5 Claims
OG exemplary drawing
 
1. A method of decoding a video, the method comprising:
obtaining quantized coefficients of a current block from a bitstream;
generating a residual signal of the current block by performing inverse quantization and inverse transform on the quantized coefficients of the current block; and
reconstructing the current block based on the residual signal,
wherein the inverse transform is performed based on a transform type of the current block,
wherein the transform type of the current block is determined based on a transform type index signaled from the bitstream,
wherein the transform type index indicates one of a plurality candidate transform types,
wherein each of the plurality of candidate transform types includes a horizontal transform type and a vertical transform type,
wherein each of the horizontal transform type and the vertical transform type is one of pre-defined transform types,
wherein the pre-defined transform types include at least one of a DCT-based transform type, a DST-based transform type, or an identity transform type.