Method and apparatus for removing redundant syntax from merge data syntax

摘要

A decoding method performed by a decoding apparatus according to this document includes determining a prediction mode of a current block based on information about a prediction mode obtained from a bitstream, and a merge candidate list based on the prediction mode. Constructing , deriving motion information of the current block based on the merge candidate list, and generating prediction samples of the current block based on the motion information, wherein the bitstream is CIIP ( and information about a CIIP availability flag indicating whether combined inter-picture merge and intra-picture prediction is available, wherein the determining includes a regular merge flag from the bitstream based on the CIIP availability flag. ) may include the step of obtaining