US 12,250,371 B2
Intra prediction method and apparatus in image coding system
Ling Li, Seoul (KR); Seunghwan Kim, Seoul (KR); and Jin Heo, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Dec. 6, 2023, as Appl. No. 18/530,895.
Application 18/530,895 is a continuation of application No. 17/964,368, filed on Oct. 12, 2022, granted, now 11,889,068.
Application 17/964,368 is a continuation of application No. 17/279,459, granted, now 11,509,891, issued on Nov. 22, 2022, previously published as PCT/KR2019/011302, filed on Sep. 3, 2019.
Claims priority of provisional application 62/755,554, filed on Nov. 4, 2018.
Prior Publication US 2024/0107010 A1, Mar. 28, 2024
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 19/46 (2014.01)
CPC H04N 19/11 (2014.11) [H04N 19/105 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A decoding apparatus for an image decoding, the decoding apparatus comprising:
a memory; and
at least one processor connected to the memory, the at least one processor configured to:
obtain image information including prediction related information, information on a reference sample line index and most probable mode (MPM) related information of a current block through a bitstream;
determine that an intra prediction is applied for the current block based on the prediction related information;
configure an MPM list for the current block;
derive an intra prediction mode of the current block based on the MPM list and the MPM related information;
derive reference neighboring samples based on the information on the reference sample line index;
generate a predicted block for the current block based on the intra prediction mode and the reference neighboring samples; and
generate a reconstructed picture based on the predicted block,
wherein the MPM list is configured based on a first intra prediction mode of a left neighboring block of the current block and a second intra prediction mode of a top neighboring block of the current block,
wherein the MPM list comprise a first MPM candidate, a second MPM candidate, a third MPM candidate, a fourth MPM candidate and a fifth MPM candidate,
wherein based on a case that a mode value of the first intra prediction mode is equal to a mode value of the second intra prediction mode and the mode value of the first intra prediction mode is greater than a mode value of a DC mode,
a mode value of the first MPM candidate is equal to the mode value of the first intra prediction mode,
a mode value of the second MPM candidate is equal to a result of an equation of (L+61)%64+2, L being the mode value of the first intra prediction mode,
a mode value of the third MPM candidate is equal to a result of an equation of (L−1)%64+2,
a mode value of the fourth MPM candidate is equal to a result of an equation of (L+60) % 64+2, and
a mode value of the fifth MPM candidate is equal to a result of an equation of (L) % 64+2.