Uniform high quality grey levels are produced by introducing into each grey level signal a variable frame phase shift for {TAIL ~ successive rows} of {HEAD ~ each frame} 
Uniform high quality grey levels are produced by introducing into each grey level signal a variable frame phase shift for { TAIL ~ successive rows } of { HEAD ~ each frame }
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 TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD