Status For consideration during MPEG # 117 Title Usage of ' hvt 1 ' in DASH Author

This contribution concentrates only on the use cases that consider adaptive streaming of HEVC videos based on tile tracks. In these use cases, a player may decide to play all tiles, possibly with different qualities, or it may also decide to download and play only some tiles (possibly just one). We consider that these use cases are the most relevant. The use case of building a complete bitstream from a single tile track (using extractors) is not considered in this contribution, since it can already be achieved with standard DASH dependencies description.