US 12,262,002 B2
Image encoding/decoding method and device
Ki Baek Kim, Daejeon (KR)
Assigned to B1 INSTITUTE OF IMAGE TECHNOLOGY, INC., Seoul (KR)
Filed by B1 INSTITUTE OF IMAGE TECHNOLOGY, INC., Seoul (KR)
Filed on May 30, 2024, as Appl. No. 18/678,368.
Application 17/874,536 is a division of application No. 16/980,680, granted, now 11,438,577, issued on Sep. 6, 2022, previously published as PCT/KR2019/003443, filed on Mar. 25, 2019.
Application 18/678,368 is a continuation of application No. 18/437,885, filed on Feb. 9, 2024.
Application 18/437,885 is a continuation of application No. 18/366,399, filed on Aug. 7, 2023, granted, now 11,956,425, issued on Apr. 9, 2024.
Application 18/366,399 is a continuation of application No. 17/874,536, filed on Jul. 27, 2022.
Claims priority of application No. 10-2018-0034174 (KR), filed on Mar. 25, 2018; application No. 10-2018-0034882 (KR), filed on Mar. 27, 2018; and application No. 10-2018-0085679 (KR), filed on Jul. 24, 2018.
Prior Publication US 2024/0323348 A1, Sep. 26, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/00 (2014.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/30 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/30 (2014.11)] 3 Claims
OG exemplary drawing
 
1. A method of decoding an image performed by an image decoding apparatus including a prediction unit, the method comprising:
checking a reference pixel region used for obtaining correlation information for a current chroma block;
determining a reference pixel processing setting based on an availability of the reference pixel region;
down-sampling a luma block corresponding to the current chroma block;
deriving the correlation information based on the reference pixel region;
performing intra prediction according to the determined reference pixel processing setting for generating a prediction block of the current chroma block; and
reconstructing the current chroma block based on the prediction block,
wherein the current chroma block is predicted by applying the correlation information to the down-sampled luma block,
wherein the reference pixel region includes at least one of a neighboring region of the current chroma block or a neighboring region of the luma block,
wherein a number of reference pixel lines belonging to the reference pixel region used for deriving the correlation information is adaptively determined based on whether the current chroma block is located on a boundary of a maximum coding block,
wherein the neighboring region includes an above neighboring region and a left neighboring region of the current chroma block, and
wherein the correlation information is derived based on a maximum value derived using at least one reference pixel included in the reference pixel region.