{HEAD ~ Guard bands} having {TAIL ~ specified levels} are inserted between the blocks, thereby assuring more accurate and fine synchronization than the known WBS art, and hence, a very clear reproduced picture 
having
{ HEAD ~ Guard bands } having { TAIL ~ specified levels } are inserted between the blocks , thereby assuring more accurate and fine synchronization than the known WBS art , and hence , a very clear reproduced picture
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH