A scanning device 1, wherein the data encoded by the tags is redundantly encoded and the processor uses {TAIL ~ the redundantly encoded data} to detect {HEAD ~ one or more errors} therein 
A scanning device 1 , wherein the data encoded by the tags is redundantly encoded and the processor uses { TAIL ~ the redundantly encoded data } to detect { HEAD ~ one or more errors } therein
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH