US 9,432,675 C1 (13,159th)
Method and apparatus for encoding/decoding intra prediction mode
Ji Ho Lee, Daejeon-si (KR); Hui Yong Kim, Daejeon-si (KR); Sung Chang Lim, Daejeon-si (KR); Jin Soo Choi, Daejeon-si (KR); and Jin Woong Kim, Daejeon-si (KR)
Filed by Ji Ho Lee, Daejeon-si (KR); Hui Yong Kim, Daejeon-si (KR); Sung Chang Lim, Daejeon-si (KR); Jin Soo Choi, Daejeon-si (KR); and Jin Woong Kim, Daejeon-si (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
Reexamination Request No. 90/019,738, Nov. 22, 2024.
Reexamination Certificate for Patent 9,432,675, issued Aug. 30, 2016, Appl. No. 14/346,756, Mar. 24, 2014.
PCT Filed Sep. 10, 2012, PCT No. PCT/KR2012/007255
§ 371(c)(1), (2), (4) Date Mar. 24, 2014,
PCT Pub. No. WO2013/048033, PCT Pub. Date Apr. 4, 2013.
Claims priority of application No. 10-2011-0098602 (KR), filed on Sep. 28, 2011; and application No. 10-2011-0114882 (KR), filed on Nov. 7, 2011.
Ex Parte Reexamination Certificate issued on Jan. 28, 2026.
Int. Cl. H04N 19/176 (2014.01); H04N 19/107 (2014.01); H04N 19/11 (2014.01); H04N 19/184 (2014.01); H04N 19/44 (2014.01); H04N 19/91 (2014.01)
CPC H04N 19/11 (2014.11) [H04N 19/107 (2014.11); H04N 19/176 (2014.11); H04N 19/184 (2014.11); H04N 19/44 (2014.11); H04N 19/91 (2014.11)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
The patentability of claims 2-4 is confirmed.
Claim 1 is cancelled.
New claims 5-7 are added and determined to be patentable.
1. A video decoding method with a decoding apparatus, comprising: obtaining, with the decoding apparatus, a first Most Probably Mode (MPM) candidate mode from at least one neighboring block adjacent to a current block of a video frame to be decoded; generating, with the decoding apparatus, a MPM list based on the first MPM candidate mode, a number of MPM candidate modes to be included in the MPM list being a fixed number; deriving, with the decoding apparatus, an intra prediction mode of the current block from the generated MPM list; and performing, with the decoding apparatus, intra prediction of the current block based on the derived intra prediction mode, wherein the MPM list includes a second MPM candidate mode, the second MPM candidate mode being representative of a directional prediction mode, the directional prediction mode corresponding to a value resulting from either adding one to a value of the first MPM candidate mode or subtracting one from the value of the first MPM candidate mode.
2. The video decoding method of claim 1, wherein the intra prediction mode of the current block is derived based on an MPM flag, wherein the MPM flag indicates whether the MPM list includes a same MPM candidate mode as the intra prediction mode of the current block.
[ 5. The video decoding method of claim 2, further comprising:
for another block to be decoded, different from the current block, setting DC mode as candidate modes corresponding to both a third neighboring block and a fourth neighboring block that are adjacent to the other block to be decoded or setting Planar mode as the candidate modes corresponding to both the third neighboring block and the fourth neighboring block, based on the third neighboring block and the fourth neighboring block not having an intra prediction mode available to intra predict the other block.]
[ 6. The video decoding method of claim 5, wherein when the third neighboring block and the fourth neighboring block do not have the intra prediction mode available to intra predict the other block such that the DC mode is set as the candidate modes corresponding to both the third neighboring block and the fourth neighboring block, an MPM candidate mode for an MPM list generated for the other block is determined as the Planar mode based on the candidate modes corresponding to both the third neighboring block and the fourth neighboring block being the same.]
[ 7. The video decoding method of claim 5, wherein when the third neighboring block and the fourth neighboring block do not have the intra prediction mode available to intra predict the other block such that the Planar mode is set as the candidate modes corresponding to both the third neighboring block and the fourth neighboring block, an MPM candidate mode for an MPM list generated for the other block is determined as the DC mode based on the candidate modes corresponding to both the third neighboring block and the fourth neighboring block being the same.]