US 12,413,715 B2
Image encoding/decoding method and device for determining division mode on basis of color format, and method for transmitting bitstream
Hyeong Moon Jang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Apr. 23, 2024, as Appl. No. 18/643,798.
Application 18/643,798 is a continuation of application No. 17/968,311, filed on Oct. 18, 2022, granted, now 11,997,261.
Application 17/968,311 is a continuation of application No. 17/703,749, filed on Mar. 24, 2022, granted, now 11,546,583.
Application 17/703,749 is a continuation of application No. PCT/KR2020/012902, filed on Sep. 23, 2020.
Claims priority of provisional application 62/905,408, filed on Sep. 25, 2019.
Prior Publication US 2024/0357089 A1, Oct. 24, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/109 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/109 (2014.11) [H04N 19/176 (2014.11); H04N 19/186 (2014.11); H04N 19/70 (2014.11)] 14 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
determining prediction mode characteristic information based on a coding type of a slice including a current block;
determining a prediction mode type of a lower-layer block split from the current block based on the prediction mode characteristic information;
obtaining the lower-layer block by splitting the current block based on the prediction mode type of the lower-layer block; and
decoding the lower-layer block based on the prediction mode type of the lower-layer block,
wherein the prediction mode type of the lower-layer block comprises a first prediction mode type specifying that both an intra prediction mode and an inter prediction mode are available, a second prediction mode type specifying that only the intra prediction mode is available and a third prediction mode type specifying that only the inter prediction mode is available,
wherein, based on a first condition for the current block being satisfied, the prediction mode characteristic information has a first value, and the first condition comprises a case where a color format of the current block is a monochrome format or a 4:4:4 format, and
wherein, based on the first condition for the current block being not satisfied, the prediction mode characteristic information has a second value or a third value based on at least one of the color format, a split mode or a size of the current block.