id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc 1062,The constraint on RPL for dynamic subpicture IDs should be for pictures within a layer,yk,,"The constraint in JVET-R2001-v9 is as follows: For each value of i in the range of 0 to sps_num_subpics_minus1, inclusive, when the value of SubpicIdVal[ i ] of a current picture is not equal to the value of SubpicIdVal[ i ] of a reference picture, the active entries of the RPLs of the coded slices in the i-th subpicture of the current picture shall not include that reference picture. The adoption was from JVET-R0276, for relaxing the existing constraint requiring that a subpicture with a different subpicture ID compared to the collocated subpicture in the previous picture in the CLVS needing to have IRAP NUTs. That ""existing"" constraint was as follows in JVET-Q2001: When the current picture is not the first picture of the CLVS, for each value of i in the range of 0 to sps_num_subpics_minus1, inclusive, if the value of SubpicIdVal[ i ] is not equal to the value of SubpicIdVal[ i ] of the previous picture in decoding order in the same layer, the nal_unit_type for all coded slice NAL units of the subpicture in the current picture with subpicture index i shall be equal to a particular value in the range of IDR_W_RADL to CRA_NUT, inclusive. As can be seen, the intent of the adoption is still a constraint (but relaxed) for pictures within the same CLVS/layer. Therefore, the text should be changed to be as follows: For each value of i in the range of 0 to sps_num_subpics_minus1, inclusive, when the value of SubpicIdVal[ i ] of a current picture is not equal to the value of SubpicIdVal[ i ] of a reference picture '''that is in the same layer as the current picture''''''', the active entries of the RPLs of the coded slices in the i-th subpicture of the current picture shall not include that reference picture. ",defect,closed,minor,,spec,,fixed,,ksuehring bbross XiangLi fbossen jvet@…