r value of DQId, the subset sequence parameter set is activated for layer representations with the particular value of DQId. This subset sequence parameter set RBSP is called the active layer SVC sequence parameter set RBSP for the particular value of DQId until it is deactivated when another SVC sequence parameter set RBSP becomes the active layer SVC sequence parameter set RBSP for the particular value of DQId or when decoding an access unit with DQIdMax less than or equal to the particular value of DQId. A subset sequence parameter set RBSP, with that particular value of seq_parameter_set_id, shall be available to the decoding process prior to its activation. When a subset sequence parameter set RBSP (nal_unit_type is equal to 15) with a particular value of seq_parameter_set_id is not already the active layer SVC sequence parameter set RBSP for a particular value of DQId less than DQIdMax and it is referred to by an activating layer buffering period SEI message for the particular value of DQId (using that value of seq_parameter_set_id) that is included in a scalable nesting SEI message, the subset sequence parameter set RBSP is activated for layer representations with the particular value of DQId. This subset sequence parameter set RBSP is called the active layer SVC sequence parameter set RBSP for the particular value of DQId until it is deactivated when another SVC sequence parameter set RBSP becomes the active layer SVC sequence parameter set RBSP for the particular value of DQId or when decoding an access unit with DQIdMax less than or equal to the particular value of DQId. A subset sequence parameter set RBSP, with that particular value of seq_parameter_set_id shall be available to the decoding process prior to its activation. A sequence parameter set RBSP or a subset sequence parameter set RBSP that includes a value of profile_idc not specified in Annex A or G shall not be referred to by activation of a picture parameter set RBSP as the active picture parameter set RBSP or as active layer picture paramet