OTE - For the t10_dep_rep_idx mechanism to be effectively used, transport mechanisms should ensure that the information is present in every packet that carries data for the particular values of dependency_id. Rec. ITU-T H.264 (01/2012) effective_idr_pic_id indicates the latest value of idr_pic_id in decoding order present in this access unit or any preceding access unit for dependency representations indicated by sei_dependency_id[i For each value of dId in the set setOfDId, the following applies: If the dependency representation with dependency id equal to dId contains a NAL unit with equal to 5 or a NAL unit with equal to 20 and idr_flag equal to 1, effective_idr_pic_id : shall be equal to idr_pic_id of the dependency representation with dependency_ic equal to dId. Otherwise (the dependency representation with dependency_id equal to dId does not contain a NAL unit with nal_unit_type equal to 5 or a NAL unit with nal_unit_type equal to 20 and idr_flag equal to 1), effective_idr_pic_id shall be equal to idr pic of the previous dependency representation in decoding order with dependency equal to dId that contains a NAL unit with nal_unit_type equal to 5 or a NAL unit with nal_unit_type equal to 20 and idr_flag equal to 1. G.13.2.12 Temporal level switching point SEI message semantics The temporal level switching point SEI message provides a mechanism for identifying temporal level switching points. If a dependency representation is associated with a temporal level switching point SEI message, then it is a temporal level switching point as specified subsequently and constrained by delta_frame_num. Otherwise, the dependency representation may or may not be a temporal level switching point. All dependency representations that are referred to in the following specification of this clause are dependency representations of primary coded pictures. In the following, let tId be the value of temporal_id of the access unit that is associated with the temporal level switching point SEI message. NOTE 1 - Let dId be the value o