Patent ID: 11889068
Assignee: LG ELECTRONICS INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An image decoding method performed by a decoding apparatus, the method comprising:
obtaining image information including prediction related information, information on a reference sample line index and most probable mode (MPM) related information of a current block through a bitstream;
determining that an intra prediction is applied for the current block based on the prediction related information;
configuring an MPM list for the current block;
deriving an intra prediction mode of the current block based on the MPM list and the MPM related information;
deriving reference neighboring samples based on the information on the reference sample line index;
generating a predicted block for the current block based on the intra prediction mode and the reference neighboring samples; and
generating a reconstructed picture based on the predicted block,
wherein the MPM list is configured based on a first intra prediction mode of a left neighboring block of the current block and a second intra prediction mode of a top neighboring block of the current block,
wherein the MPM list comprise a first MPM candidate, a second MPM candidate, a third MPM candidate, a fourth MPM candidate and a fifth MPM candidate,
wherein based on a case that a mode value of the first intra prediction mode is equal to a mode value of the second intra prediction mode and the mode value of the first intra prediction mode is greater than a mode value of a DC mode,
a mode value of the first MPM candidate is equal to the mode value of the first intra prediction mode,
a mode value of the second MPM candidate is equal to a result of an equation of (L+61)%64+2, L being the mode value of the first intra prediction mode,
a mode value of the third MPM candidate is equal to a result of an equation of (L−1)%64+2,
a mode value of the fourth MPM candidate is equal to a result of an equation of (L+60)%64+2, and
a mode value of the fifth MPM candidate is equal to a result of an equation of (L)%64+2.