| abstract |
A slice or a tile can be decoded in a single picture, without reference to information outside of a target slice or outside of a target tile. However, there are problems in that in order to decode some regions of a video in a sequence, the entire video needs to be reconstructed, and in that the slice and the tile coexist in the single picture, and the slices include an independent slice and dependent slice, causing the coding structure to be complex. In the present invention, a flag indicating whether a shape of a slice is rectangular or not is decoded, and in a case that the flag indicates that the shape of the slice is rectangular, a position and a size of the slice that is rectangular are not changed in a period of time of referring to a same SPS. The slice that is rectangular is decoded independently without reference to information of another slice. As described above, introducing the slice that is rectangular instead of the tile can simplify the coding structure that is complex. |