level supported for that profile shall also be expressed. Specific values are specified in this annex for the syntax elements profile_idc and level ide. All other values of profile_idc and level_idc are reserved for future use by ITU-T ISO/IEC. NOTE - Decoders should not infer that when a reserved value of profile_idc or level idc falls between the values specified in this Recommendation | International Standard that this indicates intermediate capabilities between the specified profiles or levels, as there are no restrictions on the method to be chosen by ITU-T | ISO/IEC for the use of such future reserved values. Profiles All constraints for picture parameter sets that are specified in clauses A.2.1 to A.2.11 are constraints for picture parameter sets that are activated in the bitstream. All constraints for sequence parameter sets that are specified in clauses A.2.1 to A.2.11 are constraints for sequence parameter sets that are activated in the bitstream. A.2.1 Baseline profile Bitstreams conforming to the Baseline profile shall obey the following constraints: Only I and P slice types may be present. NAL unit streams shall not contain nal_unit_type values in the range of 2 to 4, inclusive. Sequence parameter sets shall have frame_mbs_only_flag equal to 1. The syntax elements chroma_format_idc, bit_depth_luma_minus8 bit_depth_chroma_minus8, qpprime_y_zero_transform_bypass_flag and seq_scaling_matrix_present_flag shall not be present in sequence parameter sets. Picture parameter sets shall have weighted_pred_flag and weighted_bipred_idc both equal to 0. Picture parameter sets shall have entropy_coding_mode_flag equal to 0. Picture parameter sets shall have num_slice_groups_minus1 in the range of 0 to 7, inclusive. syntax elements transform_8x8_mode_flag, pic_scaling_matrix_present_flag, second_chroma_qp_index_offset shall not be present in picture parameter sets. The syntax element level_prefix shall not be greater than 15 (when present). The syntax elements pcm_sample_luma[i], with i = 0..255, and pcm_sample_chr