US 11,917,147 B2
Image encoding/decoding method and apparatus for limiting size of chroma block, and method for transmitting bitstream
Jangwon Choi, Seoul (KR); Jin Heo, Seoul (KR); Sunmi Yoo, Seoul (KR); Jungah Choi, Seoul (KR); and Seung Hwan Kim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/620,598
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Jun. 19, 2020, PCT No. PCT/KR2020/008001
§ 371(c)(1), (2) Date Dec. 17, 2021,
PCT Pub. No. WO2020/256488, PCT Pub. Date Dec. 24, 2020.
Claims priority of provisional application 62/863,840, filed on Jun. 19, 2019.
Prior Publication US 2022/0360777 A1, Nov. 10, 2022
Int. Cl. H04N 19/119 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/96 (2014.01)
CPC H04N 19/119 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/96 (2014.11)] 10 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
obtaining information on splitting of a current block;
determining a splitting type of the current block based on the information on splitting of the current block;
splitting the current block into a plurality of lower-layer blocks based on the splitting type; and
decoding the lower-layer blocks,
wherein the current block is a chroma block,
wherein the determining the splitting type of the current block is performed by disallowing a predetermined type, in which a width or height of the lower-layer blocks is a predetermined value, among a plurality of splitting types,
wherein a vertical binary splitting type is disallowed as the splitting type of the current block regardless of a height of the current block, based on a tree structure of the current block being a dual tree structure and a width of the current block being 4, and
wherein a horizontal binary splitting type is not disallowed as the splitting type of the current block regardless of the width of the current block, based on the tree structure of the current block being the dual tree structure and the height of the current block being 4.