Tile and subpicture partitioning

A decoder for decoding a sub-bitstream of a coded video stream, the coded video stream including a coded version of a first sub-picture and a second sub-picture of a picture, the decoder comprising:

• memory configured to store computer program code;
• and
• at least one processor configured to receive the sub-bitstream, access the computer program code, and operate as instructed by the computer program code, the computer program code including:
• decoding code configured to cause the at least one processor to decode the first sub-picture of the picture, independently from the second sub-picture, using sub-picture and tile partitioning, wherein
• (i) the first sub-picture comprises a first rectangular region of the picture and the second sub-picture comprises a second rectangular region of the picture, the second rectangular region being different from the first rectangular region,
• (ii) the first sub-picture and the second sub-picture each include at least one tile, and
• (iii) the first sub-picture and the second sub-picture do not share a common tile.

A non-transitory computer-readable medium storing computer instructions that, when executed by at least one processor, cause the at least one processor to:

• decode a first sub-picture of a picture of a coded video stream, independently from a second sub-picture of the picture of the coded video stream, using sub-picture and tile partitioning, wherein
• (i) the first sub-picture comprises a first rectangular region of the picture and the second sub-picture comprises a second rectangular region of the picture, the second rectangular region being different from the first rectangular region,
• (ii) the first sub-picture and the second sub-picture each include at least one tile, and
• (iii) the first sub-picture and the second sub-picture do not share a common tile.