r reference" or removed from the DPB. The DPB fullness represents the total number of non-empty frame buffers, including frame buffers that contain view components of other views. The removal of pictures from the DPB before possible insertion of the current picture proceeds as follows: If the decoded picture is an IDR picture the following applies: All reference pictures in the DPB are marked as "unused for reference" as specified in clause 8.2.5.1 when a coded video sequence conforming to one or more of the profiles specified in Annex A is decoded by applying the decoding process specified in clauses 2-9, or as specified in clause G.8.2.4 when a coded video sequence conforming to one or more of the profiles specified in Annex G is decoded by applying the decoding process specified in Annex G, or as specified in clause H.8.3 when a coded video sequence conforming to one or more of the profiles specified in Annex H is decoded by applying the decoding process specified in Annex H. 2. When the IDR picture is not the first IDR picture decoded and the value of PicWidthInMbs or FrameHeightInMbs or max_dec_frame_buffering derived from the active sequence parameter set is different Rec. ITU-T H.264 (01/2012) from the value of PicWidthInMbs or FrameHeightInMbs or max_dec_frame_buffering derived from the sequence parameter set that was active for the preceding picture, respectively, no_output_of_prior_pics_flag is inferred to be equal to 1 by the HRD, regardless of the actual value of no_output_of_prior_pics_flag. NOTE - Decoder implementations should try to handle frame or DPB size changes more gracefully than the HRD in regard to changes in PicWidthInMbs or FrameHeightInMbs. When no_output_of_prior_pics_flag is equal to 1 or is inferred to be equal to 1, all frame buffers in the DPB are emptied without output of the pictures they contain, and DPB fullness is set to 0. Otherwise (the decoded picture is not an IDR picture), the following applies: If the slice header of the current picture includes memory_management_control