{HEAD ~ means} for filtering a first color component signal from {TAIL ~ a composite signal} to provide a filtered first color component signal 
{ HEAD ~ means } for filtering a first color component signal from { TAIL ~ a composite signal } to provide a filtered first color component signal
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH