rame_buffering is specified by the level limits in clauses A.3.1, A.3.2, G.10.2.1, and H.10.2. When the max_dec_frame_buffering syntax element is not present, the value of max_dec_frame_buffering shall be inferred as follows: If profile_idc is equal to 44, 86, 100, 110, 122, or 244 and constraint_set3_flag is equal to 1, the value of max_dec_frame_buffering shall be inferred to be equal to 0. Otherwise (profile_id is not equal to 44, 86, 100, 110, 122, or 244 or constraint_set3_flag equal to 0), the value of max_dec_frame_buffering shall be inferred to be equal to MaxDpbFrames. E.2.2 HRD parameters semantics The syntax category of the HRD parameters syntax structure shall be inferred as follows: If the HRD parameters syntax structure is not part of an SEI message, the syntax category of the HRD parameters syntax structure is inferred to be equal to 0. Otherwise (the HRD parameters syntax structure is part of the base layer temporal HRD SEI message as specified in clause G.13 or the base view temporal HRD SEI message as specified in clause H.13), the syntax category of the HRD parameters syntax structure is inferred to be equal to 5. Rec. ITU-T H.264 (01/2012) cpb_cnt_minus1 plus 1 specifies the number of alternative CPB specifications in the bitstream. The value of cpb_cnt_minusl shall be in the range of 0 to 31, inclusive. When low_delay_hrd_flag is equal to 1, cpb_cnt_minus1 shall be equal to 0. When cpb_cnt_minusl is not present, it shall be inferred to be equal to 0. bit rate_scale (together with bit rate_value_minusl [ SchedSelIdx ]) specifies the maximum input bit rate of the SchedSelIdx-th CPB. cpb_size_scale (together with cpb_size_value_minus1[SchedSelldx ]) specifies the CPB size of the SchedSelIdx-th bit_rate_value_minus1[SchedSelldx ] (together with bit_rate_scale) specifies the maximum input bit rate for the SchedSelIdx-th CPB. bit_rate_value_minus1[SchedSelldx shall be in the range of 0 to 232 2, inclusive. For any SchedSelIdx > 0, it_rate_value_minus1[ SchedSelIdx ] shall be greater than bit_rate_v