Image encoding/decoding method, device, and recording medium having bitstream stored therein

A method of encoding a video, the method comprising:

• constructing a first candidate list of a current block;
• deriving a block vector of the current block from one of block vector candidates included in the first candidate list;
• obtaining a prediction block of the current block based on the block vector;
• and
• encoding information, indicating whether an intra block copy mode is applied to the current block or not, into a bitstream,
• wherein the first candidate list is constructed by using a cumulative coding information candidate list,
• wherein a candidate included in the cumulative coding information candidate list is inserted into the first candidate list as a block vector candidate, candidates included in the cumulative coding information candidate list being referenced in descending order of indexes of the candidates, and
• wherein, based on a pre-defined condition, it is determined whether to update the cumulative coding information candidate list is updated with the block vector of the current block or not.

A device for transmitting compressed video data, comprising:

• a processor configured to obtain the compressed video data;
• and
• a transmitter configured to transmit the compressed video data,
• wherein obtaining the compressed video data comprises:
• constructing a first candidate list of a current block;
• deriving a block vector of the current block from one of block vector candidates included in the first candidate list;
• obtaining a prediction block of the current block based on the block vector;
• and
• encoding information, indicating whether an intra block copy mode is applied to the current block or not, into a bitstream,
• wherein the first candidate list is constructed by using a cumulative coding information candidate list,
• wherein a candidate included in the cumulative coding information candidate list is inserted into the first candidate list as a block vector candidate, candidates included in the cumulative coding information candidate list being referenced in descending order of indexes of the candidates, and
• wherein, based on a pre-defined condition, it is determined whether to update the cumulative coding information candidate list is updated with the block vector of the current block or not.