US 12,309,417 B2
Image encoding/decoding method and device on basis of wrap-around motion compensation, and recording medium storing bitstream
Hendry Hendry, Seoul (KR); Seethal Paluri, Seoul (KR); and Seung Hwan Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Jul. 5, 2024, as Appl. No. 18/764,976.
Application 18/764,976 is a continuation of application No. 18/211,930, filed on Jun. 20, 2023, granted, now 12,069,290.
Application 18/211,930 is a continuation of application No. 17/952,727, filed on Sep. 26, 2022, granted, now 11,785,245, issued on Oct. 10, 2023.
Application 17/952,727 is a continuation of application No. PCT/KR2021/003791, filed on Mar. 26, 2021.
Claims priority of provisional application 63/009,980, filed on Apr. 14, 2020.
Claims priority of provisional application 63/000,474, filed on Mar. 26, 2020.
Prior Publication US 2024/0364915 A1, Oct. 31, 2024
Int. Cl. H04N 19/55 (2014.01); H04N 19/105 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/513 (2014.01)
CPC H04N 19/513 (2014.11) [H04N 19/105 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 4 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
obtaining inter prediction information of a current block and wraparound information from a bitstream; and
generating a prediction block of the current block based on the inter prediction information and the wraparound information,
wherein the wraparound information comprises a first flag specifying whether wraparound motion compensation is enabled for a current picture including the current block,
wherein, based on at least one of subpictures included in the current picture being treated as a picture and having a width different from a value being derived based on information on a maximum width of a picture in a current video sequence including the current picture, the first flag has a first value specifying that the wraparound motion compensation is disabled for the current picture,
wherein, based on the first flag having a second value specifying that the wraparound motion compensation is enabled for the current picture, the wraparound information further comprises a wraparound offset being used for performing the wraparound motion compensation,
wherein the wraparound motion compensation is performed based on either boundaries of a current subpicture including the current block or boundaries of a reference picture of the current block, based on whether the current subpicture is treated as a picture, and
wherein the wraparound motion compensation for the current block is performed by modifying a x-coordinate of a reference block in the reference picture based on the wraparound offset, the reference block being specified by a motion vector of the current block.