Method and device for video coding using template matching-based inter prediction

A method of encoding a current block by a video encoding apparatus, the method comprising:

• generating a motion vector candidate list of the current block, wherein the motion vector candidate list includes a preset number of motion vector candidates, and a motion vector candidate is a uni-directional motion vector or bi-directional motion vectors;
• performing an initial motion refinement on the motion vector candidates;
• reordering the motion vector candidates;
• determining a merge index indicative of one of the motion vector candidates;
• selecting motion information of the current block from the motion vector candidates by using the merge index;
• and
• generating a prediction block of the current block by using a selected motion information,
• wherein performing the initial motion refinement or reordering the motion vector candidates comprises, when using a template matching:
• applying filtering to block partition boundaries within a template region of the current block.

A computer-readable recording medium storing a bitstream generated by a video encoding method, the video encoding method comprises:

• generating a motion vector candidate list of a current block, wherein the motion vector candidate list includes a preset number of motion vector candidates, and a motion vector candidate is a uni-directional motion vector or bi-directional motion vectors;
• performing an initial motion refinement on the motion vector candidates;
• reordering the motion vector candidates;
• determining a merge index indicative of one of the motion vector candidates;
• selecting motion information of the current block from the motion vector candidates by using the merge index;
• and
• generating a prediction block of the current block by using a selected motion information,
• wherein performing the initial motion refinement or reordering the motion vector candidates comprises, when using a template matching:
• applying filtering to block partition boundaries within a template region of the current block.