The compressor includes {HEAD ~ structure} for detecting {TAIL ~ a data image pattern} and for generating a code representing the detected data image pattern 
The compressor includes { HEAD ~ structure } for detecting { TAIL ~ a data image pattern } and for generating a code representing the detected data image pattern
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH