US 12,382,022 B2
Image decoding method and device using DPB parameter for OLS
Hendry Hendry, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Apr. 29, 2024, as Appl. No. 18/649,043.
Application 18/649,043 is a continuation of application No. 18/198,159, filed on May 16, 2023, granted, now 12,003,705.
Application 18/198,159 is a continuation of application No. 17/748,561, filed on May 19, 2022, granted, now 11,695,923, issued on Jul. 4, 2023.
Application 17/748,561 is a continuation of application No. PCT/KR2020/019334, filed on Dec. 29, 2020.
Claims priority of provisional application 62/955,354, filed on Dec. 30, 2019.
Prior Publication US 2024/0283913 A1, Aug. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/132 (2014.01); H04N 19/105 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01); H04N 19/70 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/132 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11); H04N 19/70 (2014.11)] 8 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including Decoded Picture Buffer (DPB) parameter syntax structures and an Output Layer Set (OLS) DPB parameter index for a target OLS;
deriving DPB parameter syntax structure for the target OLS based on the OLS DPB parameter index;
performing a picture management process for pictures of a DPB based on the DPB parameter syntax structure for the target OLS;
constructing a reference picture list for a current picture based on the pictures of the DPB; and
performing inter prediction for a block in the current picture based on the reference picture list,
wherein the OLS DPB parameter index specifies the DPB parameter syntax structure for the target OLS among the DPB parameter syntax structures,
wherein an OLS DPB parameter flag for whether the DPB parameter syntax structure for the target OLS is present in a Video Parameter Set (VPS) syntax is obtained,
wherein the OLS DPB parameter syntax structure is obtained in the VPS syntax based on a value of the OLS DPB parameter flag,
wherein the OLS DPB parameter flag is obtained based on a number of layers.