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 tile columns; and

partitioning the picture into a plurality of tile rows,

wherein partitioning the picture into the plurality of tile columns comprises:

determining whether width information of each of a plurality of tile columns is to be decoded from a bitstream or not, wherein determining whether width information of each of the plurality tile columns is to be decoded from a bitstream or not comprises:

determining that the width information of a first tile column of the plurality of file columns is to be decoded from the bitstream, and in response, determining a width of the first tile column based on the width information decoded for the first tile column, and

determining that the width information of two or more additional tile columns of the plurality of tile columns is not to be decoded from the bitstream, and in response:

determining that the width of at least one of the additional tile columns is a width of a previous tile column, and

determining that the width of at least one of the additional tile columns is a remaining width of a current picture.

2. The method of claim 1 , wherein the method further comprises decoding width number information from the bitstream, the width number information specifying the number of width information to be explicitly signaled, and

wherein determination of whether the width information of a current tile column is to be decoded or not is based on a comparison between a value of the width number information and an index of the current tile column.

3. The method of claim 2 , wherein when the index of the current tile column is equal to or less than the value of the width number information, the width information of the current tile column is decoded from the bitstream, and

wherein when the index of the current tile column is greater than the value of the width number information, the width information of the current tile column is not decoded from the bitstream.

4. The method of claim 1 , wherein when it is determined that the width information of a current tile column is not to be decoded from the bitstream, the width of the current tile column is determined to be smaller one among the width of the previous tile column and the remaining width of the current picture.

5. 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

determining whether to encode width information of each of a the tile column into a bitstream or not, wherein determining whether to encode width information of each of the tile columns into the bitstream or not comprises:

determining that a width of a first tile columns of the plurality of tile columns is neither a width of a previous tile column nor a remaining width of a current picture, encoding the width information of the first tile column into the bitstream, and

determining that the width information of each of two or more additional tile columns of the plurality of tile columns is either the width of the previous tile column or the remaining width of the current picture, and in response, omitting the width information of the two or more second tile columns from the bitstream,

wherein the width of at least one of the additional tile columns is the width of the previous tile column, and

wherein the width of at least one of the additional tile columns is the remaining width of the current picture.

6. The method of claim 5 , wherein when encoding of the width information of a current tile column is omitted, the width of the current tile column is the same as smaller one among the width of the previous tile column and the remaining width of the current picture.

7. The method of claim 6 , wherein the method further comprises encoding width number information into the bitstream, the width number information specifying the number of width information to be explicitly signaled.

8. The method of claim 7 , wherein when an index of a current tile column is equal to or less than the value of the width number information, the width information of the current tile column is encoded into the bitstream, and

wherein when the index of the current tile column is greater than the value of the width number information, encoding of the width information of the current tile column is omitted.

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

a data stream stored in the non-transitory computer-readable medium, the data stream being encoded by an encoding method comprising:

partitioning a picture into a plurality of tile columns; and

partitioning the picture into a plurality of tile rows; and

determining whether to encode width information of each of a the tile column into the data stream or not, wherein determining whether to encode width information of each of the tile columns into the data stream or not comprises:

determining that a width of a first tile columns of the plurality of tile columns is neither a width of a previous tile column nor a remaining width of a current picture, encoding the width information of the first tile column into the data stream, and

determining that the width information of each of two or more additional tile columns of the plurality of tile columns is either the width of the previous tile column or the remaining width of the current picture, and in response, omitting the width information of the two or more second tile columns from the data stream,

wherein the width of at least one of the additional tile columns is the width of the previous tile column, and

wherein the width of at least one of the additional tile columns is the remaining width of the current picture.