{HEAD ~ The byte pattern} is descrambled to generate {TAIL ~ coded data} and the data is decoded 
is descrambled to generate
{ HEAD ~ The byte pattern } is descrambled to generate { TAIL ~ coded data } and the data is decoded
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH