Thats what blew me away! I was reading something on the Closed Caption that were encoded into the broadcast / videos for subtites and realised it was those scanlines you see. Then from a rabbit hole of a day found these guys restoring the data from recorded TV streams! Incredible!
Now that's what I call retrocomputing! Too bad the date on the teletext pages doesn't include the year... when was the premiere of season (pardon me, series) 3 of Babylon 5 again? Ah, 1996 (thanks Wikipedia!).
To think teletext is still around today, a fossilized technology using a standard that has been almost unchanged for 40 years! Although nowadays I mostly read it using a smartphone app - the bite-size pages are perfect for a quick and (almost) ad-free news update.
As someone who was a toddler when those "screenshots" were live, teletext is one of my favorite sources of information. Mostly because very few people read it, therefore the news are straight to the point with comparatively low political bullshit.
I read it with a python script I wrote myself that parses images into ANSI sequences and outputs them to a terminal. If I manage to put the code in a presentable state it could be a cool "show HN".
This gave me a real hit of nostalgia. All the more so as my mum (who died a couple of years ago) was a fan of Babylon 5. Sadly in her last years her own signal faded and became indecipherable.
I remember that as a teenager I did observe that in some cases, I was able to see partial teletext pages from VHS tapes recorded from TV (like a few characters of the date/time in the top row that did make some sense).
Now, seeing that it's actually possible to recover that data... I find it's too bad that we threw away all those tapes because nobody was watching them any more.
Right, I had (wrongly?) assumed that the Teletext signal had been mangled during recording. Maybe some VHS machines recorded and played back Teletext flawlessly? Or maybe it was being mangled during playback?
Ah, Digitiser, I used to read you every day. Occasionally Teletext would do multiple choice adventures, complete with ASCII art. And very little in the modern world can capture the excitement and terror of waiting for the football scores to turn the page and show if there was a new score in the Everton game.
Worth mentioning alt.digitiser on Usenet where the unaware would turn up looking for help with their digitisers[0]. Fun times on IRC with some now-internet-famous people who I won’t dox - I know you’re all here.
Around ‘94 you could “download” games over satellite (BSkyB) links and play them. They were higher rez than this article has and far more dynamic. I got so good at the darts game.
You can go back even further. If you had a BBC Micro, you could buy a Teletext unit to attach to it and download software over Teletext via system called "Prestel": https://www.youtube.com/watch?v=wq53DO7zL_g
I have vague memories of my dad managing to "hack" this system and get software for free as he worked out they used a simple XOR cipher on the BASIC source code sent over the air and most programs started with "10"!
Prestel was a Viewdata service over dialup modem (usually V.23 1200/75 bps ones). The screen rendering looks a lot like Teletext but fundamentally this is completely different technology.
Aha! I was only 5-6 years old, so my memory is probably fuzzy :-) I do remember it had a Teletext box like https://en.wikipedia.org/wiki/BBC_Micro_expansion_unit#/medi... .. I also recall he would issue commands by dialling up but then download software that came over the air.
I did some Googling and it may not have been Prestel (which he did also use) but something called "Telesoftware" – https://en.wikipedia.org/wiki/Telesoftware – which involved software being distributed over Ceefax.
- If you used Micronet (a part within the broader Prestel system) between midnight and 8am, you weren't charged for the phone call [I guess this was easy to implement because BT ran both Prestel/Micronet and the phone system)
- The phone number for 'The Gnome at Home' BBS was 888-8894
- A kind person I met on a BBS sent me a cassette in the mail that had software to upload data at 1200 baud (half duplex, as the modem couldn't do 1200/1200).
I'd guess you might be thinking of the darts game that Playjam had. This was on Sky Digital rather than analogue Sky, so more like 1998-1999. From memory the old analogue system didn't have any interactive features.
I got addicted to that too, and Beehive Bedlam in 2001.
I love TV tech. The old Teletext / Ceefax product was pretty impressive for its time and some insane engineering. I spent a number of years writing software for the TV industry (both backend and STB software) as a result of playing about with this when I was younger.
My brother was so disappointed at losing Beehive Bedlam when we switched from Sky to NTL in ~2002. I remember asking around for something similar and he subsequently was hooked on Bust-a-Move for about 2 years. Music still etched on my brain.
The NOS (Dutch Broadcasting Foundation) still provides Teletext via their website[1] that is still used quite a lot for its short format. There is also a public API[2]
You Americans have definitely missed on teletext, it's funny that you're comparing it to Prodigy (to be fair you have two-way systems, but teletext are much more accessible, being built on TV). It actually influenced how CC/subtitles looked: since US captions don't have colour, you rely on moving it closer to the speaker and on writing names in-stream while British subtitles (especially of BBC specification) also used colours.
I had a toast-rack ZX Spectrum as my childhood computer but grew up in North America, and just made the connection how much the TT graphics look like Spectrum graphics.
Unrelated, but imagine if smartphones today were instead called screenphones. Fun!
I think that the reason teletext never went live in NA (although to be fair CBC had some serious trials) is because of different broadcast standards. Not in "NTSC versus PAL" mind you, but in "nationally-run versus autonomous affiliates of networks" sense. Convincing many independent stations to install equipment and to update the information for a nebulous service that you aren't sure that the viewers who bought their sets would appreciate, while across the pond the cost of switching to televisions with teletext is (for most people) call your renter if they have one available for you to swap to while we BBC/IBA (the Independent Broadcasting Authority) will take care of our side, even if you're in the Channel Islands.
http://www.ceephax.co.uk/
Also..: I'm really surprised to learn old VHS tapes can contain embedded teletext signals! Very cool article.