I have tried a number of ways to bring back teletext, with some success.
It's possible to receive live teletext from some satellite TV channels. Last time I tried it, Eurosport and RTE (Ireland's national broadcaster) carried teletext. These channels are encrypted but surprisingly the teletext can be received without a subscription or viewing card, using an old non-HD Sky Digibox. RTE doesn't appear in the Sky TV guide and needs to be added manually to the 'Other Channels' menu, unless you have an Irish-registered Sky viewing card.
I posted my results here :
https://www.radios-tv.co.uk/communit.../2/#post-51326
The Raspberry Pi can generate teletext. It was a bit tricky to set up and install the software, especially since I didn't have much experience of Linux, but I got there in the end. See
https://www.radios-tv.co.uk/communit...-raspberry-pi/
Since writing that article, the teastop.co.uk website no longer hosts the files you need. This link still appears to be active:
https://github.com/peterkvt80/vbit2/wiki
Also since then, another interesting device has been discovered that regenerates 5 analogue TV channels complete with teletext from a digital terrestrial signal. Called the Multiview T-35 , it was designed to make the digital switchover easier to deal with in hotels, nursing homes etc. where there were large numbers of existing analogue TVs. The Multiview box converts the Freeview EPG into a series of teletext pages, adding them to the analogue signal. More discussion here:
https://www.radios-tv.co.uk/communit...s-lives-again/