r all block edges of the slice. disable_deblocking_filter_idc equal to 2 specifies that all luma and chroma block edges of the slice are filtered with exception of the block edges that coincide with slice boundaries. disable_deblocking_filter_idc equal to 3 specifies a two stage deblocking filter process for the slice: After filtering all block luma and chroma block edges that do not coincide with slice boundaries (as disable_deblocking_filter idc were equal to 2), the luma and chroma block edges that coincide with slice boundaries are filtered. disable_deblocking_filter_idc equal to 4 specifies that all luma block edges of the slice are filtered, but the deblocking of the chroma block edges is disabled. disable_deblocking_filter_idc equal to 5 specifies that all luma block edges of the slice are filtered with exception of the block edges that coincide with slice boundaries (as if disable_deblocking_filter_ido were equal to 2), and that deblocking for chroma block edges of the slice is disabled. disable_deblocking_filter_ide equal to 6 specifies that the deblocking for chroma block edges is disabled and that the two stage deblocking filter process is used for luma block edges of the slice: After filtering all block luma block edges that do not coincide with slice boundaries (as if disable_deblocking_filter_ide were equal to 2), the luma block edges that coincide with slice boundaries are filtered. When no_inter_layer_pred_fla is equal to 1 or tcoeff_level_prediction_flag is equal to 1, the value of disable_deblocking_filter_idc shall be in the range of 0 to 2, inclusive. slice_alpha_c0_offset_div2, and slice_beta_offset_div2 have the same semantics as specified in clause 7.4.3. slice_group_change_cycle has the same semantics as specified in clause 7.4.3. ref_layer_dq_id specifies the layer representation inside the current coded picture that is used for inter-layer prediction of the current layer representation. When present, the value of ref_layer_dq_id shall be in the range of 0 to DQId - 1, inclusive. When ref