be equal to the value of temporal_id for the current scalable layer. dynamic_rect_flag| equal to 1 indicates that the region represented by the current scalable layer representation is a dynamically changing rectangular subset of the base region. dynamic_rect_flag[ i ] equal to 0 indicates that the region represented by the current scalable layer representation is a fixed rectangular subset of the base region and is specified by the syntax elements horizontal_offset[ vertical_offset| i], region_width[ and region_height[ When sub_pic_layer_flag[ i ] is equal to 1, dynamic_rect_flag[ i ] shall be equal to 0. horizontal_offset[ i], vertical_offset[ region_width| and region_height| indicate the position and size of the region represented by the current scalable layer in relation to its base region. Let picSubset be the set of the primary coded pictures, inside the current scalable layer representation, that contain any VCL NAL unit with dependency equal to dependency_i id| i]. Let basePicSubset be the set of the primary coded pictures, inside the representation of the scalable layer b with layer ] equal to base_region_layer_id[i], that contain any VCL NAL unit with dependency_id equal to dependency_id[ b]. Depending on sub_pic_layer_flag[ the following applies: If sub_pic_layer_flag[ i ] is equal to 0, the top-left luma frame sample in the decoded pictures for picture set picSubset corresponds to the luma frame sample at the luma frame sample location (horizontal offset[ i], vertical_offset[ in the decoded pictures for the picture set basePicSubset. The region represented by the decoded pictures for picture set picSubset represents an area of (region_width[ ])x(region_height[ luma frame samples in the decoded pictures for the picture set basePicSubset. When frame_mbs_only_flag is equal to 0 for any primary coded VCL NAL unit of the current scalable layer, (vertical_offset[i]%2) and (region_height[ i % 2) shall both be equal to 0. Otherwise (sub_pic_layer_flag[ is equal to 1), the top-left luma frame sample of the sub