wherein {HEAD ~ an amount} of defocusing performed by said means for {TAIL ~ defocusing} and an adjustment of said gain by said means for adjusting are dependent on a content of said composite signal 
wherein { HEAD ~ an amount } of defocusing performed by said means for { TAIL ~ defocusing } and an adjustment of said gain by said means for adjusting are dependent on a content of said composite signal
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH 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