US 12,143,577 B2
Intra prediction method and device
Hyun Suk Ko, Daejeon (KR); Jin Ho Lee, Daejeon (KR); Sung Chang Lim, Daejeon (KR); Jung Won Kang, Daejeon (KR); Ha Hyun Lee, Seoul (KR); Dong San Jun, Daejeon (KR); Seung Hyun Cho, Daejeon (KR); Hui Yong Kim, Daejeon (KR); and Jin Soo Choi, Daejeon (KR)
Assigned to LX Semicon Co., Ltd., Daejeon (KR)
Filed by LX SEMICON CO., LTD., Daejeon (KR)
Filed on Jul. 27, 2023, as Appl. No. 18/360,623.
Application 18/360,623 is a continuation of application No. 17/401,578, filed on Aug. 13, 2021.
Application 17/401,578 is a continuation of application No. 16/099,639, granted, now 11,128,861, issued on Sep. 21, 2021, previously published as PCT/KR2017/006241, filed on Jun. 15, 2017.
Claims priority of application No. 10-2016-0078272 (KR), filed on Jun. 22, 2016; and application No. 10-2016-0099618 (KR), filed on Aug. 4, 2016.
Prior Publication US 2023/0370589 A1, Nov. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/11 (2014.01); H04N 19/105 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/184 (2014.01); H04N 19/593 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/11 (2014.11) [H04N 19/105 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/184 (2014.11); H04N 19/593 (2014.11); H04N 19/96 (2014.11)] 10 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the method comprising:
obtaining a coding block by partitioning an image;
determining whether a size of the coding block belongs to a predetermined range;
determining a split type for the coding block based on whether the size of the coding block belongs to the predetermined range;
deriving a current coding block split from the coding block based on the split type for the coding block; and
reconstructing the current coding block,
wherein determining the split type for the coding block comprises:
decoding a split flag indicating whether the coding block is split;
based on a value of the split flag being equal to 1, decoding a first flag indicating whether the coding block is quad tree split; and
based on a value of the first flag indicating that the coding block is not quad tree split, decoding a second flag indicating whether a split direction of the coding block is a vertical direction or a horizontal direction.