Method and device for image encoding/decoding, and recording medium

A video encoding method, comprising:

• determining prediction information for a target block based on information relation on related to a prediction method;
• and
• performing prediction on the target block using the prediction information, wherein
• the prediction information comprises a list,
• the list comprising reordered candidates is generated by performing reordering for candidates according to an ascending order for template matching costs of the candidates,
• a specific number of the candidates are selected according to the ascending order for the template matching costs of the candidates to determine the reordered candidates,
• the candidates are determined by a plurality of blocks at a plurality of specific positions determined by a position of the target block,
• each of the plurality of blocks is spatially adjacent to the target block, and
• the plurality of blocks comprise at least one block which is horizontally or vertically adjacent to a side of the target block and not adjacent to any corner of the target block.

A non-transitory computer-readable recording medium storing a bitstream, the bitstream comprising:

• information related to a prediction method, wherein prediction information for a target block is determined based on the information related to the prediction method;
• and
• prediction on the target block is performed using the prediction information, wherein
• the prediction information comprises a list,
• the list comprising reordered candidates is generated by performing reordering for candidates according to an ascending order for template matching costs of the candidates,
• a specific number of the candidates are selected according to the ascending order for the template matching costs of the candidates to determine the reordered candidates,
• the candidates are determined by a plurality of blocks at a plurality of specific positions determined by a position of the target block,
• each of the plurality of blocks is spatially adjacent to the target block, and
• the plurality of blocks comprise at least one block which is horizontally or vertically adjacent to a side of the target block and not adjacent to any corner of the target block.

A non-transitory computer-readable recording medium storing a bitstream, the bitstream comprising:

• bitstream data representing information related to a prediction method,
• wherein the bitstream data is configured to cause a decoder to:
• determine prediction information for a target block based on the information related to the prediction method, and
• perform prediction on the target block using the prediction information,
• wherein the prediction information comprises a list generated by reordering candidates according to an ascending order for template matching costs of the candidates,
• wherein a specific number of the candidates are selected according to the ascending order to determine the reordered candidates,
• the candidates are determined by a plurality of blocks at a plurality of specific positions determined by a position of the target block,
• each of the plurality of blocks is spatially adjacent to the target block, and
• the plurality of blocks comprise at least one block which is horizontally or vertically adjacent to a side of the target block and not adjacent to any corner of the target block.