Generally, the present invention provides apparatus and {HEAD ~ procedure} to restore {TAIL ~ the output signal} to a known D.C. level, from which the video component is referenced 
to restore
Generally , the present invention provides apparatus and { HEAD ~ procedure } to restore { TAIL ~ the output signal } to a known D.C. level , from which the video component is referenced
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH