US 12,328,443 B2
Encoding and decoding method and device for determining a decoding order between a left and a right lower blocks
Yin-Ji Piao, Yongin-si (KR); Jie Chen, Seoul (KR); and Elena Alshina, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jan. 24, 2024, as Appl. No. 18/420,898.
Application 18/420,898 is a continuation of application No. 18/166,272, filed on Feb. 8, 2023, granted, now 11,924,462.
Application 18/166,272 is a continuation of application No. 16/651,865, granted, now 11,616,971, issued on Mar. 28, 2023, previously published as PCT/KR2018/003824, filed on Mar. 30, 2018.
Claims priority of provisional application 62/564,660, filed on Sep. 28, 2017.
Prior Publication US 2024/0171768 A1, May 23, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 7/12 (2006.01); H04N 19/117 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/52 (2014.01); H04N 19/635 (2014.01); H04N 19/64 (2014.01)
CPC H04N 19/52 (2014.11) [H04N 19/117 (2014.11); H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/635 (2014.11); H04N 19/647 (2014.11)] 4 Claims
OG exemplary drawing
 
1. A video decoding method, comprising:
obtaining, from a bitstream, split information indicating whether a current block is to be split into two or three horizontally neighboring lower blocks;
when the split information indicates that the current block is to be split into two horizontally neighboring lower blocks, splitting the current block into the two horizontally neighboring lower blocks;
determining a decoding order between a left lower block and a right lower block, among the two horizontally neighboring lower blocks, according to encoding order information obtained from the bitstream, wherein the right lower block is adjacent to a right side of the left lower block;
when the right lower block is decoded prior to the left lower block according to the decoding order, determining context information for a syntax element of prediction mode information of the left lower block based on a sum of a value of prediction mode information of the right lower block, a value of prediction mode information of a left block adjacent to a left side of the left lower block, and a value of prediction mode information of an upper block adjacent to an upper side of the left lower block, wherein the prediction mode information of the left lower block indicates whether the left lower block is predicted in an intra prediction mode, wherein the prediction mode information of the right lower block indicates whether the right lower block is predicted in the intra prediction mode, wherein the prediction mode information of the left block indicates whether the left block is predicted in the intra prediction mode, and wherein the prediction mode information of the upper block indicates whether the upper block is predicted in the intra prediction mode;
determining a context index for the syntax element of the prediction mode information of the left lower block using the context information;
performing context-adaptive arithmetic entropy-decoding using the context index to obtain the prediction mode information of the left lower block; and
when the prediction mode information of the left lower block indicates that the left lower block is predicted in the intra prediction mode, determining prediction samples of the left lower block using at least one of the left block, the upper block, and the right lower block.