{HEAD ~ The digital image information} contained in each group is partitioned in {TAIL ~ units} of a second predetermined value smaller than the first predetermined value 
is partitioned in
{ HEAD ~ The digital image information } contained in each group is partitioned in { TAIL ~ units } of a second predetermined value smaller than the first predetermined value
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH