You're right. My bad. I worked on a modernisation project for the DVB version of this in 2018. Internally we used to refer to it as Teletext, hence my confusion.
Re:Teletext on a BBC Computer in 2024
by 15457345234 on Monday January 29, 2024 @09:36AM
(#39176708)
> Teletext was an analogue service
Teletext was a _digital_ service provided over an _analogue_ bearer - the modulation of the signal is continuous, not discrete.
Red Button is the service that replaced teletext/ceefax in 2012. Teletext was an analogue service, Red button was a whole new digital service offering similar information, it’s entirely different infrastructure underneath, it’s not just a “lick of paint”.