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