Image encoding/decoding method and device

A method of encoding a video, the method comprising:

• partitioning a current picture into a plurality of tiles;
• determining whether a rectangular slice mode is applied to the current picture or not;
• and
• in response to the rectangular slice mode being applied to the current picture, partitioning a tile among the plurality of tiles into a plurality of slices,
• wherein the tile is partitioned only in a horizontal direction to generate the plurality of slices,
• wherein slice number information indicating a number of slices for which height information is explicitly encoded is encoded into the bitstream,
• wherein, for a first slice of which an order is less than or equal to the number of slices, the height information is explicitly encoded,
• wherein, for a second slice of which an order is greater than the number of slices, encoding the height information is omitted, the first slice and the second slice being included in the tile, and
• wherein a height of the second slice is the same as a height of a previous slice for which the height information is encoded lastly.

A computer-readable recording medium for storing a bitstream comprising video encoding data which is generated by a video encoding method,

• wherein the video encoding method comprises:
• partitioning a current picture into a plurality of tiles;
• determining whether a rectangular slice mode is applied to the current picture or not;
• and
• in response to the rectangular slice mode being applied to the current picture, partitioning a tile among the plurality of tiles into a plurality of slices,
• wherein the tile is partitioned only in a horizontal direction to generate the plurality of slices,
• wherein slice number information indicating a number of slices for which height information is explicitly encoded is encoded into the bitstream,
• wherein, for a first slice of which an order is less than or equal to the number of slices, the height information is explicitly encoded,
• wherein, for a second slice of which an order is greater than the number of slices, encoding the height information is omitted, the first slice and the second slice being included in the tile, and
• wherein a height of the second slice is the same as a height of a previous slice for which the height information is encoded lastly.