The characters and graphics from a teletext/data transmission decoder are synthetically combined with {HEAD ~ the portions} of the images of the video signals for blank zones of {TAIL ~ the screen} by the synthesizing circuit 
The characters and graphics from a teletext / data transmission decoder are synthetically combined with { HEAD ~ the portions } of the images of the video signals for blank zones of { TAIL ~ the screen } by the synthesizing circuit
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH