- 1]) ( BitRate[ SchedSelIdx ] - BitRate[ SchedSelIdx 1]), (C-17) c(r) = a * CpbSize[ SchedSelIdx ] ++1-a) * CpbSize[ SchedSelIdx-1 (C-18) initial_cpb_removal_delay[1 SchedSelIdx * BitRate SchedSelIdx * initial_cpb_removal_delay[ SchedSelIdx - SchedSelIdx - 1] (C-19) any SchedSelldx > 0 and r such that BitRate[ SchedSelIdx - BitRate[ SchedSelIdx ] such that r and c(r) are within the limits as specified in Annex A, Annex G, and Annex H for the maximum bit rate and buffer size for the specified profile and level. NOTE 1 - initial_cpb_removal_delay| SchedSelIdx ] can be different from one buffering period to another and have to be re-calculated. For output timing decoder conformance, an HRD as described above is used and the timing (relative to the delivery time of the first bit) of picture output is the same for both HRD and the DUT up to a fixed delay. For output order decoder conformance, the HSS delivers the bitstream to the DUT "by demand" from the DUT, meaning that the HSS delivers bits (in decoding order) only when the DUT requires more bits to proceed with its processing. NOTE 2 - This means that for this test, the coded picture buffer of the DUT could be as small as the size of the largest access unit. A modified HRD as described below is used, and the HSS delivers the bitstream to the HRD by one of the schedules specified in the bitstream such that the bit rate and CPB size are restricted as specified in Annex A, Annex G, and Annex H. The order of pictures output shall be the same for both HRD and the DUT. For output order decoder conformance, the HRD CPB size is equal to CpbSize[ SchedSelIdx ] for the selected schedule and the DPB size is equal to MaxDpbFrames. Removal time from the CPB for the HRD is equal to final bit arrival time and decoding is immediate. The operation of the DPB of this HRD is specified in clause C.4.1. C.4.1 Operation of the output order DPB The decoded picture buffer contains frame buffers. When a coded video sequence conforming to one or more of the profiles specified in Annex A i