Video Coding

A method of forming a bitstream by a video encoder apparatus comprising:

• encoding media data of one or more video tiles for an output video frame into one or more bitstream parts, each bitstream part being associated with a video tile and each video tile being associated with a tile identifier;
• determining tile positioning information comprising the tile identifiers of the video tiles and one or more boundary identifiers associated with each video tile, the tile identifiers and boundary identifiers determining a tile map defining a spatial layout of one or more video tiles in the output video frame;
• and
• forming a bitstream, the bitstream comprising the bitstream parts representing the encoded media data of the one or more video tiles and tile positioning information associated with the one or more video tiles.

A video decoding apparatus comprising:

• a computer readable storage medium having at least part of a program embodied therewith;
• and
• a computer readable storage medium having computer readable program code embodied therewith, and a processor coupled to the computer readable storage medium, wherein responsive to executing the computer readable program code, the processor is configured to perform executable operations comprising:
• receiving a bitstream, the bitstream comprising a plurality of bitstream parts, a bitstream part comprising encoded media data associated with one or more video tiles, each video tile of the one or more video tiles representing a different region in an output video frame, the encoded media data of a video tile configured for being independently decodable;
• receiving tile positioning information comprising tile identifiers and boundary identifiers, a tile identifier identifying encoded media data belonging to a video tile, the tile identifier being associated with one or more boundary identifiers, a boundary identifier identifying at least one boundary of the video tile identified by the tile identifier;
• determining a tile map on the basis of the tile identifiers and boundary identifiers, the tile map defining a spatial layout of one or more video tiles in the output video frame;
• and
• generating an output video frame on the basis of decoded media data of one or more video tiles and the tile map.

A video encoding apparatus comprising:

• a computer readable storage medium having at least part of a program embodied therewith;
• and
• a computer readable storage medium having computer readable program code embodied therewith, and a processor coupled to the computer readable storage medium, wherein responsive to executing the computer readable program code, the processor is configured to perform executable operations comprising:
• encoding media data of one or more video tiles for an output video frame into one or more bitstream parts, each bitstream part being associated with a video tile and each video tile being associated with a tile identifier;
• determining a tile map representing a spatial layout of video tiles by associating each video tile with a position in the output video frame;
• determining tile positioning information comprising the tile identifiers of the video tiles and one or more boundary identifiers associated with each video tile, wherein the boundary identifiers are configured to identify neighboring video tiles in the tile map;
• and
• forming a bitstream, the bitstream comprising the bitstream parts representing the encoded media data of video tiles and tile positioning information associated with the video tiles.

A non-transitory computer readable medium having instructions stored thereon that, when executed by a processor of computer configured for executing a decoding process, cause the computer to carry out operations including:

• receiving a bitstream, the bitstream comprising a plurality of bitstream parts, a bitstream part comprising encoded media data associated with a video tile, each video tile of the one or more video tiles representing a different region in an output video frame, the encoded media data of a video tile configured for being independently decodable;
• receiving tile positioning information comprising tile identifiers and boundary identifiers, a tile identifier identifying encoded media data belonging to a video tile, the tile identifier being associated with one or more boundary identifiers, a boundary identifier identifying at least one boundary of the video tile identified by the tile identifier;
• determining a tile map on the basis of the tile identifiers and boundary identifiers, the tile map defining a spatial layout of one or more video tiles in the output video frame;
• and
• generating an output video frame on the basis of decoded media data of one or more video tiles and the tile map.