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