Image signal encoding/decoding method and device for same

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

partitioning a picture into a plurality of tiles; and

determining at least one slice based on the plurality of tiles,

wherein partitioning the picture into the plurality of tiles includes:

determining a width of a first tile column in the picture, the width of the first tile column being determined by a syntax representing the width of the first tile column; and

determining a width of a second tile column neighboring the first tile column, and

wherein when the width of the second tile column is the same as the width of the first tile column, and decoding of a syntax representing the width of the second tile column is omitted, the width of the second tile column is set the same as the width of the first tile column.

2. The method of claim 1 , wherein the second tile column is a rightmost tile column in the picture.

3. The method of claim 1 , wherein determining the slice includes:

decoding information representing a method of determining the slice, the information representing the method of determining the slice representing whether the slice is defined based on a raster scanning order or in a rectangular shape; and

decoding information for determining tiles included in the slice, and

wherein when the slice is defined based on the raster scanning order, information for determining the tiles corresponds to information representing a number of tiles included in the slice, and

wherein when the slice is defined in a rectangular shape, information for determining the tiles corresponds to information for determining at least one index among tiles included in the slice.

4. The method of claim 3 , wherein information for determining the index represents index difference between a tile at a predetermined position included in the slice and a tile at a predetermined position included in a previous slice.

5. The method of claim 4 , wherein for a last slice in the picture, decoding of the information for determining tiles is omitted.

6. A video encoding method comprising:

partitioning a picture into a plurality of tiles; and

determining at least one slice based on the plurality of tiles,

wherein partitioning the picture into the plurality of tiles includes encoding information representing a width of a first tile column in the picture; and determining whether a width of a second tile column neighboring the first tile column is encoded, and

wherein when the width of the second tile column is the same as the width of the first tile column, encoding of a syntax representing the width of the second tile column is omitted.

7. The method of claim 6 , wherein the second tile column is a rightmost tile column in the picture.

8. The method of claim 6 , wherein determining the slice includes encoding information representing a method of determining the slice and the information represents whether the slice is defined based on a raster scanning order or in a rectangular shape; and

encoding information for determining tiles included in the slice,

wherein when the slice is defined based on the raster scanning order, information for determining the tiles corresponds to information representing the number of tiles included in the slice, and

wherein when the slice is defined in a rectangular shape, information for determining the tiles corresponds to information for determining at least one index among tiles included in the above slice.

9. The method of claim 8 , wherein information for determining the index represents index difference between a tile at a predetermined position included in the slice and a tile at a predetermined position included in a previous slice.

10. The method of claim 9 , wherein for a last slice in the picture, the encoding of information for determining the tiles is omitted.