US 11,689,716 B2
Image encoding/decoding method, apparatus, and recording medium for storing bitstream
Hyun Suk Ko, Daejeon (KR); Sung Chang Lim, Daejeon (KR); Jung Won Kang, Daejeon (KR); Dong San Jun, Daejeon (KR); Seung Hyun Cho, Daejeon (KR); Jin Ho Lee, Daejeon (KR); Ha Hyun Lee, Seoul (KR); Hui Yong Kim, Daejeon (KR); and Jin Soo Choi, Daejeon (KR)
Assigned to LX SEMICON CO., LTD, Daejeon (KR)
Filed by LX SEMICON CO., LTD, Daejeon (KR)
Filed on Oct. 15, 2021, as Appl. No. 17/502,647.
Application 17/502,647 is a continuation of application No. 16/471,071, granted, now 11,184,609, previously published as PCT/KR2018/000031, filed on Jan. 2, 2018.
Claims priority of application No. 10-2017-0000205 (KR), filed on Jan. 2, 2017.
Prior Publication US 2022/0038692 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 19/11 (2014.01); H04N 19/159 (2014.01); H04N 19/176 (2014.01); H04N 19/46 (2014.01)
CPC H04N 19/11 (2014.11) [H04N 19/159 (2014.11); H04N 19/176 (2014.11); H04N 19/46 (2014.11)] 13 Claims
OG exemplary drawing
 
1. An image decoding method performed by an image decoding apparatus, the method comprising:
deciding whether an intra prediction mode of a current block is identical to an intra prediction mode included in a first MPM(Most Probable Mode) list;
determining the intra prediction mode of the current block using the intra prediction mode included in the first MPM list in case the intra prediction mode of the current block is determined to be identical to the intra prediction mode included in the first MPM list;
determining the intra prediction mode of the current block using an intra prediction mode included in a second MPM list for the current block in case the intra prediction mode of the current block is determined to be not identical to the intra prediction mode included in the first MPM list;
generating a prediction block of the current block based on the determined intra prediction mode of the current block; and
generating a reconstructed block of the current block by using the prediction block of the current block,
wherein the second MPM list is configured based on an intra prediction mode of a left block adjacent to the current block and an intra prediction mode of an upper block adjacent to the current block,
wherein the second MPM list comprises the intra prediction mode of the left block and the intra prediction mode of the upper block and two or more additional MPM candidates, and
wherein the two or more additional MPM candidates are derived based on the intra prediction mode of the left block and the intra prediction mode of the upper block in response to that the intra prediction mode of the left block is different from the intra prediction mode of the upper block.