means for adjusting {HEAD ~ a gain} of at least one other of {TAIL ~ a plurality} of color component signals of said composite signal, 
means for adjusting { HEAD ~ a gain } of at least one other of { TAIL ~ a plurality } of color component signals of said composite signal ,
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH