US 12,348,727 B2
Method and apparatus for image encoding/decoding on basis of POC MSB information, and recording medium for storing bitstream
Hendry Hendry, Seoul (KR); Hyeong Moon Jang, Seoul (KR); Jaehyun Lim, Seoul (KR); Nae Ri Park, Seoul (KR); and Seung Hwan Kim, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 18/008,619
Filed by LG Electronics Inc., Seoul (KR)
PCT Filed Jun. 11, 2021, PCT No. PCT/KR2021/007352
§ 371(c)(1), (2) Date Dec. 6, 2022,
PCT Pub. No. WO2021/256785, PCT Pub. Date Dec. 23, 2021.
Claims priority of provisional application 63/038,903, filed on Jun. 15, 2020.
Claims priority of provisional application 63/039,421, filed on Jun. 15, 2020.
Prior Publication US 2023/0224470 A1, Jul. 13, 2023
Int. Cl. H04N 19/136 (2014.01); H04N 19/159 (2014.01); H04N 19/169 (2014.01); H04N 19/172 (2014.01)
CPC H04N 19/136 (2014.11) [H04N 19/159 (2014.11); H04N 19/172 (2014.11); H04N 19/188 (2014.11)] 13 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the image decoding method comprising:
determining whether first information specifying a value of a picture order count (POC) most significant bit (MSB) cycle of a current picture is present in a picture header;
determining a POC MSB of the current picture based on whether the first information is present in the picture header; and
deriving a POC of the current picture based on the determined POC MSB,
wherein, based on the first information being not present in the picture header and the current picture being not a CLVSS (coded layer video sequence start) picture, a POC difference between the current picture and a previous picture preceding the current picture in decoding order is less than half a maximum value of a POC least significant bit (LSB) of the current picture, and
wherein, based on the current picture being an IRAP (intra random access point) picture or a GDR (gradual decoding refresh) picture as a recovery point picture, the first information is present in the picture header.