In operation, {HEAD ~ the input buffer} 91 temporarily stores {TAIL ~ the image data} supplied from the the enlarging/reducing section 84 
temporarily stores
In operation , { HEAD ~ the input buffer } 91 temporarily stores { TAIL ~ the image data } supplied from the the enlarging / reducing section 84
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH