Method for encoding/decoding image signal and apparatus therefor

A method of encoding a video, the method comprising:

• partitioning a picture into a plurality of tile columns;
• partitioning the picture into a plurality of tile rows;
• and
• encoding, into a bitstream, slice type information indicates one of a raster scan slice definition method and a rectangular slice definition method,
• wherein when the slice type information indicates the rectangular slice definition method, the method further comprises:
• encoding, into the bitstream, slice number information which specifying a number of slices included in the picture
• selectively encoding width information of a slice which is determined based on a number of tile columns included in the slice;
• and
• selectively encoding height information of the slice which is determined based on a number of tile rows included in the slice,
• wherein the width information has a value subtracting 1 from the number of tile columns included in the slice,
• wherein whether to encode the width information of the slice into the bitstream is determined based on whether a tile located at top-left of the slice is included in rightmost one among the plurality of tile columns, and
• wherein when the tile located at top-left of the slice is included in the rightmost tile column, encoding the width information of the slice into the bitstream is omitted.

A non-transitory computer-readable medium for storing data associated with a video, comprising:

• a data stream stored in the non-transitory computer-readable medium, the data stream comprising:
• tile column number information for partitioning a picture into a plurality of tile columns;
• tile row number information for partitioning the picture into a plurality of tile rows;
• and
• slice type information indicating one of a raster scan slice definition method and a rectangular slice definition method,
• wherein when the slice type information indicates the rectangular slice definition method, the data stream further comprises:
• slice number information which specifying a number of slices included in the picture;
• width information of a slice which specifying a number of tile columns included in the slice;
• and
• height information of the slice which specifying a number of tile rows included in the slice,
• wherein the width information has a value subtracting 1 from the number of tile columns included in the slice,
• wherein whether to insert the width information of the slice into the data stream or not is determined based on whether a tile located at top-left of the slice is included in a rightmost one among the plurality of tile columns, and
• wherein when the tile located at top-left of the slice is included in the rightmost tile column, the width information of the slice is not inserted in the data stream, and a value thereof is inferred to be 0.