Method and apparatus for processing video signal

A method for encoding a video, the method comprising:

• determining a reference sample line of a current block by selecting one among a neighboring reference sample line adjacent to the current block and non-neighboring reference sample lines not adjacent to the current block;
• generating a Most Probable Mode (MPM) list for the current block;
• determining whether an intra-prediction mode of the current block is identical to one of a plurality of MPM candidates in the MPM list, wherein information indicating whether there is an MPM candidate identical to the intra prediction mode of the current block is encoded;
• and
• performing intra-prediction for the current block based on the intra-prediction mode of the current block and reference samples included in the reference sample line,
• wherein the reference sample line of the current block is determined from one or more reference sample line candidates, index information specifying one of one or more reference sample line candidates being encoded into a bitstream,
• wherein information specifying the number of the one or more reference sample line candidates is encoded at a sequence level,
• wherein the reference sample line candidates comprise a neighboring reference sample line candidate adjacent to the current block and non-neighboring reference sample line candidates not adjacent to the current block,
• wherein, in one of a case that the current block is a coding block of a square shape and a case that the current block is one of partitions of a non-square shape generated by partitioning the coding block, the intra-prediction of the current block is performed by using only the neighboring reference sample line candidate among the reference sample line candidates, and
• wherein, in the other case, the intra-prediction of the current block is performed by using any one of the reference sample line candidates.

A device for transmitting compressed video data, comprising:

• a processor configured to obtain the compressed video data;
• and
• a transmitting unit configured to transmit the compressed video data,
• wherein obtaining the compressed video data comprises:
• determining a reference sample line of a current block by selecting one among a neighboring reference sample line adjacent to the current block and non-neighboring reference sample lines not adjacent to the current block;
• generating a Most Probable Mode (MPM) list for the current block;
• determining whether an intra-prediction mode of the current block is identical to one of a plurality of MPM candidates in the MPM list, wherein information indicating whether there is an MPM candidate identical to the intra prediction mode of the current block is encoded;
• and
• performing intra-prediction for the current block based on the intra-prediction mode of the current block and reference samples included in the reference sample line,
• wherein the reference sample line of the current block is determined from one or more reference sample line candidates, index information specifying one of one or more reference sample line candidates being encoded into a bitstream,
• wherein information specifying the number of the one or more reference sample line candidates is encoded at a sequence level,
• wherein the reference sample line candidates comprise a neighboring reference sample line candidate adjacent to the current block and non-neighboring reference sample line candidates not adjacent to the current block,
• wherein, in one of a case that the current block is a coding block of a square shape and a case that the current block is one of partitions of a non-square shape generated by partitioning the coding block, the intra-prediction of the current block is performed by using only the neighboring reference sample line candidate among the reference sample line candidates, and
• wherein, in the other case, the intra-prediction of the current block is performed by using any one of the reference sample line candidates.