US 11,902,511 B2
Inter prediction-based image coding method and device
Naeri Park, Seoul (KR); Junghak Nam, Seoul (KR); and Hyeongmoon Jang, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Aug. 19, 2022, as Appl. No. 17/891,679.
Application 17/891,679 is a continuation of application No. 17/550,812, filed on Dec. 14, 2021, granted, now 11,457,208.
Application 17/550,812 is a continuation of application No. PCT/KR2020/007717, filed on Jun. 15, 2020.
Claims priority of provisional application 62/861,983, filed on Jun. 14, 2019.
Prior Publication US 2022/0417502 A1, Dec. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/00 (2014.01); H04N 19/105 (2014.01); H04N 19/137 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01)
CPC H04N 19/105 (2014.11) [H04N 19/137 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11)] 15 Claims
OG exemplary drawing
 
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including prediction mode information and residual information from a bitstream;
determining a prediction mode for a current block as an interprediction mode using a symmetric motion vector differences (SMVD) based on the prediction mode information;
deriving reference picture lists including L0 and L1 for the current block;
deriving picture order count (POC) differences between each of reference pictures and a current picture, for each of the L0 and the L1;
deriving motion information including a reference picture index for each of the L0 and the L1 based on the POC differences;
generating predicted samples of the current block based on the motion information;
generating residual samples of the current block based on the residual information; and
generating reconstructed samples of the current block based on the predicted samples and the residual samples,
wherein the reference picture index for the L0 is derived based on a short-term reference picture included in the L0, and
wherein the reference picture index for the L1 is derived based on a short-term reference picture included in the L1.