interlace_processing_flag signals whether reference processing will be applied on a frame or a field basis. If it is set to zero, processing will take place in the frame domain. If this flag is set to 1 then processing shall be performed separately for each field.
disable_part_symmetry_flag (when present) signals whether filter selection for spatially collocated partitions belonging to different views is constrained or unconstrained. When this flag is not set, both collocated partitions in either view are processed with the same RPU filter to derive the enhancement layer prediction. Hence half as many filters are signaled. When this flag is set, a filter is signaled for each partition in the processed picture. If not present, then all partitions use the same filtering method (NULL). This flag is constrained to be equal to 1 if the rpu_format is set to SBS and PicWidthInMbs=1 or if rpu_format is set to OU or TAB and PicHeightInMapUnits is equal to 1. If not present, the value of this flag will be set to 1.
num_x_partitions_minus1 signals the number of partitions that are used to subdivide the processed picture in the horizontal dimension during filtering. It can take any non-negative integer value. If not present, then the value of num_x_partitions_minus1 is set equal to 0. The value of num_x_partitions_minus 1 is between 0 and Clip3(0, 15, (PicWidthInMbs>>1)?1), where PicWidthInMbs is specified in the H.264 specification.
num_y_partitions_minus1 signals the number of partitions that are used to subdivide the processed picture in the vertical dimension during filtering. It can take any non-negative integer value. If not present, then the value of num_y_partitions_minus 1 is set equal to 0. The value of num_y_partitions_minus1 is between 0 and Clip3(0, 7, (PicHeightInMapUnits>>1)?1), where PicHeightInMapUnits is specified in the H.264 specification.
RPU Data Payload Semantics