13. In a computing system, a method comprising: receiving, in a predefined order in an elementary bitstream, one or more syntax structures that contain a coded region for a region of an image or video, and, after the one or more syntax structures that contain the coded region, a different syntax structure, wherein the different syntax structure: is a supplemental enhancement information (“SEI”) message having a payload type that designates the SEI message as an end-of-region indicator; and includes a next slice segment address that indicates a slice segment address for a next slice segment header when the slice segment address for the next slice segment header is present in the elementary bitstream; and detecting the completion of the coded region using the different syntax structure.
13. In a computing system, a method comprising: receiving, in a predefined order in an elementary bitstream, one or more syntax structures that contain a coded region for a region of an image or video, and, after the one or more syntax structures that contain the coded region, a different syntax structure, wherein the different syntax structure: is a supplemental enhancement information (“SEI”) message having a payload type that designates the SEI message as an end-of-region indicator; and includes a next slice segment address that indicates a slice segment address for a next slice segment header when the slice segment address for the next slice segment header is present in the elementary bitstream; and detecting the completion of the coded region using the different syntax structure. 15. The method of claim 13 , wherein the SEI message is a suffix SEI message.