US 11,956,425 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 Aug. 7, 2023, as Appl. No. 18/366,399.
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 18/366,399 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 2023/0388489 A1, Nov. 30, 2023
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)] 8 Claims
OG exemplary drawing
 
1. A method of decoding an image, comprising:
obtaining, from a bitstream, first information indicating whether a color copy mode is supported;
determining whether the color copy mode is supported for a current chroma block in the image based on the first information;
determining, in case the first information indicates that the color copy mode is supported, whether the color copy mode is applied for the current chroma block in the image;
down-sampling a luma block corresponding to the current chroma block in response to the determination that the color copy mode is applied for the current chroma block;
deriving correlation information for the color copy mode based on a pre-determined reference region;
predicting the current chroma block by applying the correlation information to the down-sampled luma block to generate a prediction block of the current chroma block;
obtaining a transform coefficient for the current chroma block;
generating a residual block by inverse-transforming the transform coefficient; and
reconstructing the current chroma block based on the prediction block and the residual block,
wherein the reference region includes at least one of a neighboring region of the current chroma block or a neighboring region of the luma block, and
wherein a number of reference pixel lines belonging to the reference region used for the deriving of the correlation information is adaptively determined based on a determination of whether the current chroma block is located on a boundary of a maximum coding block.