Systems and methods for signaling tile structures for coded video images

An electronic device for coding video data, the electronic device comprising:

• at least one processor;
• and
• one or more non-transitory computer-readable media coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the electronic device to:
• code a first flag syntax in a picture parameter set, wherein the first flag syntax specifies whether tiles within each of at least one slice are in a raster scan order or the tiles within each of the at least one slice cover a rectangular region of a picture;
• code a second flag syntax in the picture parameter set, wherein the second flag syntax specifies that each of the at least one slice includes only one rectangular region or each of the at least one slice includes one or more rectangular regions;
• code a first number syntax when the first number syntax is present in the picture parameter set, wherein the first number syntax is present in the picture parameter set when a value of the first flag syntax is equal to one and a value of the second flag syntax is equal to zero;
• code a slice address syntax into a slice header when it is determined that the slice address syntax is to be coded into the slice header, wherein the slice address syntax is present in the slice header when the value of the first flag syntax is equal to zero and a number of tiles of a picture is greater than one;
• determine, based on the value of the first flag syntax, whether to code a second number syntax into the slice header, wherein the second number syntax is coded into the slice header when the value of the first flag syntax is equal to zero;
• and
• derive a variable specifying a number of the tiles within each of the at least one slice by using the second number syntax.

A non-transitory machine-readable medium of an electronic device storing one or more computer-executable instructions for decoding video data, the one or more computer-executable instructions, when executed by at least one processor of the electronic device, causing the electronic device to:

• decode a first flag syntax in a picture parameter set, wherein the first flag syntax specifies whether tiles within each of at least one slice are in a raster scan order or the tiles within each of the at least one slice cover a rectangular region of a picture;
• decode a second flag syntax in the picture parameter set, wherein the second flag syntax specifies that each of the at least one slice includes only one rectangular region or each of the at least one slice includes one or more rectangular regions;
• decode a first number syntax when the first number syntax is present in the picture parameter set, wherein the first number syntax is present in the picture parameter set when a value of the first flag syntax is equal to one and a value of the second flag syntax is equal to zero;
• decode a slice address syntax when the slice address syntax is present in a slice header, wherein the slice address syntax is present in the slice header when the value of the first flag syntax is equal to zero and a number of tiles of a picture is greater than one;
• determine, based on the value of the first flag syntax, whether a second number syntax is present in the slice header, wherein the second number syntax is present in the slice header when the value of the first flag syntax is equal to zero;
• and
• derive a variable specifying a number of the tiles within each of the at least one slice by using the second number syntax when the second number syntax is present in the slice header.