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