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by marton_s 1637 days ago
How does one "recover" teletext data, you may wonder.

Apparently, there is software for extracting teletext signal recorded on VHS tapes with the help of a video capture hardware: https://github.com/ali1234/vhs-teletext

What amazingly strange hobbies people have!
3 comments
bencollier49 1637 days ago
Teletext was a big deal in the UK, especially for people of a certain age. The computer games "mag", "Digitiser" was quite central to games culture in the 90s.

I'm grateful to them for saving it!

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bennysomething 1637 days ago
Haven't read the article yet, came here to search comments to see if anyone mentioned digitiser! Loved that mag. Mr biffo now writes a monthly bit in UK retro gamer.
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crtasm 1637 days ago
His series of posts on the history of Digitiser is an excellent read:

https://www.digitiser2000.com/main-page/games-of-my-years-di...

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dang 1634 days ago
Sorry for the offtopicness but would you mind emailing hn@ycombinator.com? I want to send you a repost invite.
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aarroyoc 1637 days ago
I think that's not possible on DVB-T (yes, there are countries like mine where DVB-T is used with Teletext). I wonder what are the options to recover teletext from today digital TV.
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phh 1637 days ago
A standard dvb dongle with tsduck to extract specifically the teletext pid should do the trick. You can also use tsduck and hides modulator to inject your own teletext to your tv. Or you could use it to inject a HbbTV web page and do whatever you want. Like including a teletext JS emulator.
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DaiPlusPlus 1637 days ago
I believe DVB-T still supported "analogue" teletext, but DVBs-own-telext is known as MHEG https://en.wikipedia.org/wiki/MHEG-5

...and I've no idea :)

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grim_fandango 1637 days ago
It is possible on DVB-T and DVB-S, and it's possible to extract the teletext service from the transport streams.
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a-dub 1637 days ago
looking closely at the software, what they've done is pretty remarkable. due to loss in recording, the author home spun some pretty clever reconstruction techniques that start to look vaguely ml'ish.

which is kind of the joke i guess. a lot of what people call ml and ai has been used for noisy signal decoding for a long, long time.

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