US 12,149,689 B2
Image encoding method/device, image decoding method/device and recording medium having bitstream stored therein
Joo Hee Moon, Seoul (KR); Dong Jae Won, Goyang-si (KR); and Sung Won Lim, Seoul (KR)
Assigned to INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY, Seoul (KR)
Filed by Industry Academy Cooperation Foundation of Sejong University, Seoul (KR)
Filed on Jul. 8, 2022, as Appl. No. 17/860,350.
Application 17/860,350 is a continuation of application No. 17/196,160, filed on Mar. 9, 2021, granted, now 11,659,174.
Application 17/196,160 is a continuation of application No. 16/341,830, granted, now 10,979,709, issued on Apr. 13, 2021, previously published as PCT/KR2017/011215, filed on Oct. 12, 2017.
Claims priority of application No. 10-2016-0133756 (KR), filed on Oct. 14, 2016; and application No. 10-2017-0127941 (KR), filed on Sep. 29, 2017.
Prior Publication US 2022/0368901 A1, Nov. 17, 2022
Int. Cl. H04N 19/119 (2014.01); H04N 19/129 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/593 (2014.01); H04N 19/61 (2014.01)
CPC H04N 19/119 (2014.11) [H04N 19/129 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/593 (2014.11); H04N 19/61 (2014.11)] 11 Claims
OG exemplary drawing
 
1. An image decoding method, the method comprising:
determining a transform performing area for secondary inverse-transform in a current transform block;
performing the secondary inverse-transform on the determined transform performing area; and
performing primary inverse-transform on the current transform block including a secondary inverse-transformed area,
wherein the transform performing area is determined to a left-upper area of the current transform block,
wherein a size of the transform performing area is variably determined based on a comparison result between a width and a height of the current transform block and a predetermined threshold value, and
wherein the primary inverse-transform is performed on an entire area of the current transform block.