US 12,389,021 B2
Image decoding method and device for same
Hendry Hendry, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/918,081
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Apr. 12, 2021, PCT No. PCT/KR2021/004562
§ 371(c)(1), (2) Date Oct. 10, 2022,
PCT Pub. No. WO2021/206524, PCT Pub. Date Oct. 14, 2021.
Claims priority of provisional application 63/008,666, filed on Apr. 11, 2020.
Prior Publication US 2023/0164334 A1, May 25, 2023
Int. Cl. H04N 19/30 (2014.01); H04N 19/107 (2014.01); H04N 19/172 (2014.01); H04N 19/593 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/30 (2014.11) [H04N 19/107 (2014.11); H04N 19/172 (2014.11); H04N 19/593 (2014.11); H04N 19/70 (2014.11)] 5 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining a bitstream for a Coded Video Sequence (CVS) including a Coded Video Sequence Start (CVSS) Access Unit (AU);
deriving image information on a current picture of the CVSS AU based on the bitstream; and
decoding the current picture based on the image information,
wherein the CVSS AU includes only a Picture Unit (PU) for an output layer of an Output Layer Set (OLS) of the CVS,
wherein the CVSS AU includes a PU for an independent layer of the OLS, and
wherein a first PU of a specific layer, which corresponds to a layer having no PU in the CVSS AU, in a specific AU following the CVSS AU in a decoding order is an Intra Random Access Point (IRAP) PU based on the CVSS AU being an IRAP AU including the layer having no PU or a Gradual Decoding Refresh (GDR) PU based on the CVSS AU being a GDR AU including the layer having no PU.