Method for encoding/decoding image signal, and device for same

1. A method of decoding a video, the method comprising:

partitioning a current picture into a plurality of tiles; and

decoding slice partitioning information, specifying a slice definition method, from a bitstream, the slice definition method being determined as a raster scan slice definition method or a rectangular slice definition method,

wherein, under the rectangular slice definition method, the method further comprises:

determining a width of a first rectangular slice based on width information for the first rectangular slice;

determining a height of the first rectangular slice based on height information for the first rectangular slice,

wherein the height information for the first rectangular slice is decoded from the bitstream only when the first rectangular slice adjoins a left boundary of the current picture,

wherein when the height information for the first rectangular slice is decoded from the bitstream, the height of the first rectangular slice is determined based on the height information decoded from the bitstream, and

wherein when the height information for the first rectangular slice is not decoded from the bitstream, the height information for the first rectangular slice is inferred to be same with another rectangular slice who adjoins the left boundary of the current picture.

2. The method of claim 1 ,

wherein in response that both the width information and the height information are equal to 0, the method further comprises decoding slice number information from the bitstream,

wherein when the slice number information indicates a first value, the first rectangular slice occupies an entire region of a tile, and

wherein when the slice number information indicates other than the first value, the first rectangular slice is one of a plurality of rectangular slices generated by partitioning the tile.

3. A method of encoding a video, the method comprising:

partitioning a current picture into a plurality of tiles; and

encoding slice partitioning information, specifying a slice definition method, into a bitstream, the slice definition method being determined as a raster scan definition method or a rectangular slice definition method,

wherein under the rectangular slice definition method, the method further comprises:

selectively encoding width information which specifying a width of the first rectangular slice into the bitstream; and

selectively encoding height information which specifying a height of the first rectangular slice into the bitstream,

wherein the height information for the first rectangular slice is encoded into the bitstream only when the first rectangular slice adjoins a left boundary of the current picture

wherein when the first rectangular slice adjoins the left boundary of the current picture, the height information for the first rectangular slice is encoded into the bitstream and a value thereof is determined by referring to the height of the first rectangular slice, and

wherein when the first rectangular slice does not adjoin the left boundary of the current picture, the height information for the first rectangular slice is not encoded into the bitstream and the height of the first rectangular slice is the same as another rectangular slice who adjoins the left boundary of the current picture.

4. The method of claim 3 ,

wherein in response that both the width information and the height information are equal to 0, the method further comprises encoding slice number information into the bitstream,

wherein when the first rectangular slice occupies an entire region of a tile, the slice number information is set to have a first value, and

wherein when the first rectangular slice is one of a plurality of rectangular slices generated by partitioning the tile, the slice number information is set to have other than the first value.