US 12,256,090 B2
Image encoding/decoding method and device using palette mode, and method for transmitting bitstream
Hyeong Moon Jang, Seoul (KR); Sunmi Yoo, Seoul (KR); and Jung Hak Nam, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Apr. 29, 2024, as Appl. No. 18/649,534.
Application 18/649,534 is a continuation of application No. 18/198,170, filed on May 16, 2023, granted, now 12,003,740.
Application 18/198,170 is a continuation of application No. 17/697,474, filed on Mar. 17, 2022, granted, now 11,689,732, issued on Jun. 27, 2023.
Application 17/697,474 is a continuation of application No. PCT/KR2020/012898, filed on Sep. 23, 2020.
Claims priority of provisional application 62/904,578, filed on Sep. 23, 2019.
Prior Publication US 2024/0298012 A1, Sep. 5, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/186 (2014.01); H04N 19/119 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/186 (2014.11) [H04N 19/119 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/96 (2014.11)] 13 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
obtaining palette information and palette index prediction information of a current block from a bitstream, based on a palette mode applying for the current block;
constructing a palette predictor for the current block based on the palette information and constructing a palette table for the current block based on the palette predictor;
generating a palette index map for the current block based on the palette index prediction information; and
decoding the current block based on the palette table and the palette index map,
wherein whether a split structure of the current block is a local dual tree structure is determined based on at least one of a tree type of the current block and a split structure of a coding tree unit (CTU) including the current block,
wherein whether the palette predictor is updated is determined based on whether the split structure of the current block being the local dual tree structure, and
wherein the local dual tree structure is a split structure in which additional splitting is performed only for a luma block within a CTU that has been split into a single tree structure.