52. A method according to any of Claims 50 to 51 wherein the indication comprises a dependency forest or graph that indicates a set of prediction dependencies for one or more tiles that are not other non-in-picture predicted tiles to one or more tiles of the in- picture-prediction-enabled tile set. 

53. A method according to any of Claims 50 to 52, wherein the indication comprises a set of anchor positions for a set of intra block copy motion vectors of a set of dependent tiles in the in-picture-prediction-enabled tile set. 

54. An apparatus comprising at least one processor and at least one memory including computer program code for one or more programs, the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to: 

receive a bitstream comprising a coded picture, the coded picture comprising one or more tiles; 

receive an indication of an in-picture-prediction-enabled tile set, wherein the in- picture-prediction-enabled tile set identifies one or more dependent tiles from the one or more tiles, wherein the one or more dependent tiles are dependent on another dependent tile within a coded picture or form a logical atomic unit with another dependent tile; and 

decode the bitstream according to the indication of the in-picture-prediction-enabled tile set. 

55. An apparatus according to Claim 54 wherein the indication of the in-picture- prediction-enabled tile set is encoded in one or more of: a sequence parameter set associated with the bitstream, a picture parameter set associated with the bitstream, or a supplemental enhancement information message associated with the bitstream. 

56. An apparatus according to Claim 55 wherein the indication indicates whether the in-picture-prediction-enabled tile set is a temporal motion-constrained tile set. 

57. An apparatus according to any of Claims 55 to 56 wherein the indication comprises a dependency forest or graph that indicates a set of prediction dependencies for one 

