1. A method for decoding a video, the method comprising: obtaining, from a bitstream, information about a location of a row boundary of a tile and information about a location of a column boundary of the tile; determining tiles, including a current tile, based on the information about the location of the row boundary of the tile, and the information about the location of the column boundary of the tile; and obtaining, based on split information of a coding unit, at least one coding unit from a maximum coding unit included in both the current tile and a current slice segment, wherein all maximum coding units in the current slice segment are included in the current tile, and when the split information indicate a split at a current depth, a coding unit of the current depth is split into coding units of a lower depth.