Convert a B&W TV to display 1080i?

[old_tv_nut]

vidoe bandwidth needs ot be about 35 MHz, but you cna cheat it down to about 20 MHz without too much notieeable effect. The H sweep is more of a problem. playing with a 5-inch monitor that doesn't stress the HOT too much is not as hard as a large screen where components are run close to their limit.

Some HD systems were proposed that used spot-wobble to resolve more "pixels" on the screen. Dot intelace the fields, then wobble the beam up a quarter line on one dot and down a quarter line on the next dot. [EDIT - you would reverse the phase of the wobble in the next frame, to get all the spots filled in in 2 frames] Of course, you would need all the video memory to create the dot-interlaced fields. this does not give full HD resolution on diagonals, but does on vertical and horizontal lines. There was even a system proposed used a 6-field sequence if I recall correctly. I think some private demos were made, but it was never brought out as hardware for proof of concept, and I suspect it had motion and/or dot-crawl problems especially when played back on a non-wobbled legacyTV.