Only the negative portion of {HEAD ~ the color difference signal R Y input} by {TAIL ~ the Y C separation circuit} 205 shown in FIG 4 is picked up by the positive clip circuit 220 
by
Only the negative portion of { HEAD ~ the color difference signal R Y input } by { TAIL ~ the Y C separation circuit } 205 shown in FIG 4 is picked up by the positive clip circuit 220
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH