ScaledRefLayerPicWidthInSamples is equal to RefLayerPicWidthInSamples, ScaledRefLayerPicHeightInSamples is equal to RefLayerPicHeightInSamples, (ScaledRefLayerLeftOffset% 16) is equal to 0, (ScaledRefLayerTopOffset% ( 16*(1+field_pic_flag+MbaffFrameFlag)))is equal to 0, field_pic_flag is equal to RefLayerFieldPicFlag, MbaffFrameFlag is equal to RefLayerMbaffFrameFlag, chroma_format_idc is equal to RefLayerChromaFormatIdc, chroma_phase_x_plus1_flagis equal to ref_layer_chroma_phase_x_plus1_flag for the slices with no_inter_layer_pred_flag equa to 0, chroma_phase_y_plusl is equal to ef_layer_chroma_phase_y_plus1 for the slices with no_inter_layer_pred_flag equalto 0. Otherwise, SpatialResolutionChangeFlag is set equal to 1. The variable RestrictedSpatialResolutionChangeFlag is derived as follows: If SpatialResolutionChangeFlag is equal to 0 or all of the following conditions are true, RestrictedSpatialResolutionChangeFlag is set equal to 1: ScaledRefLayerPicWidthInSamples is equal to RefLayerPicWidthInSamples or (2 *RefLayerPicWidthInSamples), Rec. ITU-T H.264 (01/2012) ScaledRefLayerPicHeightInSamples is equal to RefLayerPicHeightInSamples or (2 * RefLayerPicHeightInSamples), ScaledRefLayerLeftOffset% 16) is equal to 0, (ScaledRefLayerTopOffset% (16* field_pic_flag) ) is equal to 0, MbaffFrameFlag is equal to 0, RefLayerMbaffFrameFlag is equal to 0, lield_pic_flagis equaltoRefLayerFieldPicFlag. Otherwise, RestrictedSpatialResolutionChangeFlag is set equal to 0. slice_skip_flag specifies the presence of the slice data in scalable extension syntax structure. When slice_skip_flag is not present, it shall be inferred to be equal to 0. slice_skip_flag equal to 0 specifies that the slice data in scalable extension syntax structure is present in the NAL unit. slice_skip_flag equal to 1 specifies that the slice data in scalable extension syntax structure is not present in the NAL unit and that the syntax elements for the macroblock layer of the slice are derived by the following process: 1. CurrMbAddr is derived by CurrMb