described embodiments apply as follows: when the tile identifier of the coded tile (comprising the prediction unit) is equal to a specific value denoted as tileldA, the tile identifier intended for deriving a motion vector anchor position is inferred to be equal to tileldA, and a tile position of the tile with tile identifier equal to tileldA in a reference picture for the motion vector is used in the motion vector anchor position derivation. This embodiment establishes a tile correspondence between pictures based on the same tile identifier value. In an embodiment for encoding, it is indicated in or along the bitstream, e.g. in PPS, SPS, or VPS, that the tile identifier intended for deriving a motion vector anchor position is inferred to be same as the tile identifier for slice location information. In an embodiment, it is decoded from or along the bitstream, e.g. from PPS, SPS, or VPS, that the tile identifier intended for deriving a motion vector anchor position is inferred to be same as the tile identifier for slice location information. The indication may be specific for an indicated set of tile identifiers or may apply to all tile identifiers. For example, the following syntax or alike may be used for an indication applying to all tile identifiers: 

[00155] tile id relative motion flag specifies whether horizontal and vertical offsets for deriving motion vector anchor position are not in use. tile id relative motion flag equal to 0 indicates that horizontal and vertical offsets for deriving motion vector anchor position are not in use. tile id relative motion flag equal to 1 indicates that horizontal and vertical offsets for deriving motion vector anchor position are in use and are derived from the the tile identifier of the coded tile as described above. 

[00156] In some embodiments, a tile identifier intended for deriving a motion vector anchor position is accompanied by a block index, wherein the block index includes a syntax element indicative of a block position for a block within the tile. For example, the block index may be indicated with a single syntax element, e.g., block_index_wrt_tile_id syntax element, or with two syntax elements, e.g., first block in tile flag and block index wrt tile id. first block in tile flag indicates whether the horizontal and vertical offsets co-incide with the top-left comer of a tile block index wrt tile id is indicative of a block position within a 

