Hat tip to @mathew - I just learned that France had a graeter than 720i broadcast standard in the 1940s!
I gotta find some old french gear, I guess.
HD broadcasting in 1948!
The sets were 4:3 of course, but basically they were 4:3 720i black and white.
(in practice it was actually more like 816×736 px vs 720's 960×720, but also it was analog so the minor differences were probably lost anyway.)
The standard was used in to the 80s, but I'm having a really hard time finding any information about it.
If you're french, and you know what this was called in france, please let me know!
@ajroach42 wikipedia's write-up covers the basics (line frequency, bandwidth, etc) - not in any great detail, but given its dearth of external references, there just might not be much out there
A social network for the 19A0s.