Method for encoding/decoding image signal, and device for same
A video decoding method according to the present disclosure may include partitioning a current picture into a plurality of tiles, decoding partitioning information representing a slice type, wherein the partitioning information represents whether a rectangular slice is applied and decoding first width information and first height information of a slice when the partitioning information represents that the rectangular slice is applied.
1. A method of decoding a video, the method comprising:
obtaining, from a bitstream, a current picture of the video, wherein the current picture is partitioned into a plurality of tiles;
determining that the current picture is associated with a rectangular slice type;
parsing, from the bitstream, a flag representing whether a number of slices in the current picture is one, wherein a value of the flag is one of:
a first value representing that the number of slices in the current picture is one, or
a second value representing that the number of slices in the current picture is greater than one;
determining whether to parse slice configuration information from the bitstream based on the flag, wherein determining whether to parse slice configuration information from the bitstream comprises at least one of:
responsive to determining that the number of slices in the current picture is one, refraining from parsing the slice configuration information from the bitstream, or
responsive to determining that the number of slices in the current picture is greater than one, parsing the slice configuration information from the bitstream.
2. The method of claim 1 , further comprising:
determining, based on the flag, that the number of slices in the current picture is greater than one; and
responsive to determining that the number of slices in the current picture is greater than one, parsing the slice configuration information from the bitstream.
3. The method of claim 2 , where the slice configuration information comprises syntax representing an index of a tile included in one of the slices.
4. The method of claim 2 , wherein the slice configuration information comprises syntax representing a difference between a first index of a first tile and a second index of a second tile, wherein the first tile and the second tile are included in one of the slices.
5. A system comprising:
one or more processors; and
memory storing instructions that when executed by the one or more processors, cause the one or more processors to perform operations comprising:
obtaining, from a bitstream, a current picture of a video, wherein the current picture is partitioned into a plurality of tiles;
determining that the current picture is associated with a rectangular slice type;
parsing, from the bitstream, a flag representing whether a number of slices in the current picture is one, wherein a value of the flag is one of:
a first value representing that the number of slices in the current picture is one, or
a second value representing that the number of slices in the current picture is greater than one;
determining whether to parse slice configuration information from the bitstream based on the flag, wherein determining whether to parse slice configuration information from the bitstream comprises at least one of:
responsive to determining that the number of slices in the current picture is one, refraining from parsing the slice configuration information from the bitstream, or
responsive to determining that the number of slices in the current picture is greater than one, parsing the slice configuration information from the bitstream.
6. The system of claim 5 , the operations further comprising:
determining, based on the flag, that the number of slices in the current picture is greater than one; and
responsive to determining that the number of slices in the current picture is greater than one, parsing the slice configuration information from the bitstream.
7. The system of claim 6 , where the slice configuration information comprises syntax representing an index of a tile included in one of the slices.
8. The system of claim 6 , wherein the slice configuration information comprises syntax representing a difference between a first index of a first tile and a second index of a second tile, wherein the first tile and the second tile are included in one of the slices.
9. One or more non-transitory, computer-readable storage media having instructions stored thereon, that when executed by one or more processors, cause the one or more processors to perform operations comprising:
obtaining, from a bitstream, a current picture of a video, wherein the current picture is partitioned into a plurality of tiles;
determining that the current picture is associated with a rectangular slice type;
parsing, from the bitstream, a flag representing whether a number of slices in the current picture is one, wherein a value of the flag is one of:
a first value representing that the number of slices in the current picture is one, and
a second value representing that the number of slices in the current picture is greater than one;
determining whether to parse slice configuration information from the bitstream based on the flag, wherein determining whether to parse slice configuration information from the bitstream comprises at least one of:
responsive to determining that the number of slices in the current picture is one, refraining from parsing the slice configuration information from the bitstream, or
responsive to determining that the number of slices in the current picture is greater than one, parsing the slice configuration information from the bitstream.
10. The one or more non-transitory, computer-readable storage media of claim 9 , the operations further comprising:
determining, based on the flag, that the number of slices in the current picture is greater than one; and
responsive to determining that the number of slices in the current picture is greater than one, parsing the slice configuration information from the bitstream.
11. The one or more non-transitory, computer-readable storage media of claim 10 , where the slice configuration information comprises syntax representing an index of a tile included in one of the slices.
12. The one or more non-transitory, computer-readable storage media of claim 10 , wherein the slice configuration information comprises syntax representing a difference between a first index of a first tile and a second index of a second tile, wherein the first tile and the second tile are included in one of the slices.