television standards (was Re: Pravetz 82)

On Tue, 2010-05-25 at 20:21 -0700, Eric Smith wrote: Correct. When they were setting up the first public television service, High Definition was defined as anything with more than 240 lines. Baird's standard (competing with the EMI Marconi 405 line system) was 240 lines, progressive at 25 frames a second. From what I remember reading about it, it used an intermittent film process where the scene was shot on film, rapidly developed with poisonous developing chemicals and scanned with a mirror screw flying spot camera (from what I remember, don't quote me on that). Just a side note, in one documentary on the subject, it finished with a television veteran saying that when WWII started, he was told the whole reason why the television station was rushed into service was to get as many CRT's as possible into production for the RADAR project. This was, of course, top secret. He finishes by saying that had it not have been for television, RADAR wouldn't have been so quickly developed, and that it was RADAR that helped to win the Battle of Britain (again, this is my memory speaking... perhaps someone would like to correct me). Cheers, Alexis.