Commercial scan converter that supports a few old
school video inputs.
It's hard for me to think of as "secret" or "proprietary" an
adjustment that was made by a trimpot on a analog TV/CRT
and probably even brought out to the front panel (maybe
hidden by a little door).
So maybe there is some generational difference.
Someday a young automotive engineer will, I don't doubt, reinvent
the manual choke on the dash and think it's something new :-)
Tim.