eference" as specified in clause 8.2.5.4.2 is invoked with substituting long_term_pic_num long_term_base_pic_num. For this invocation of the process specified in clause 8.2.5.4.2, all pictures that are not marked as "reference base picture" are considered as not present. NOTE 2 - Long-term reference pictures that are not marked as "reference base pictures" cannot be marked as "unused for reference" by a memory_management_base_control_operation, equal to 2. G.8.2.4.4 SVC adaptive memory control decoded reference picture marking process This process is invoked when adaptive_ref_pic_marking_mode_flagisequal to 1. The memory_management_control_operationcommands with values of 1 to 6 are processed in the order they occur in the dec_ref_pic_marking() syntax structure after the current picture has been decoded. The memory_management_control_operation command with value of 0 specifies the end of the memory_management_control_operation commands. Memory management control operations are applied to pictures as follows: If field_pic_flag is equal to 0, memory_management_control_operation commands are applied to the frames or complementary reference field pairs specified. Otherwise field_pic_flag is equal to 1), memory_management_control_operation commands are applied to the individual reference fields specified. For each memory_management_control_operation command with a value not equal to 0, the following applies: If memory_management_control_operation is equal to 1, the marking process of a short-term reference picture as "unused for reference" as specified in clause 8.2.5.4.1 is invoked. For this invocation of the process specified in clause 8.2.5.4.1, all pictures that are marked as "reference base picture" are considered as not present. NOTE 1 - Short-term reference pictures that are marked as "reference base pictures" cannot be marked as "unused for reference" by a memory_management_control_operation equal to 1. Otherwise, if mnemory_management_control_operation is equal to 2, the marking process of a long-term referen