Video coding method and apparatus for performing MRL-based intra prediction

摘要

The image decoding method according to this document comprises the steps of constructing an MPM list including candidate intra prediction modes for a current block, and indicating an intra prediction mode for the current block among the candidate intra prediction modes included in the MPM list deriving an intra prediction mode of the current block from the MPM list based on MPM index information, generating prediction samples for the current block based on the intra prediction mode, and the current block based on the prediction samples and generating a reconstructed picture for a block, wherein the configuring of the MPM list is based on a case in which a value of reference line index information indicating a reference line used for intra prediction of the current block is not 0. DC mode is derived as one of the candidate intra prediction modes and characterized in that it is included in the MPM list.