12-08-2018, 07:00 AM
(This post was last modified: 12-08-2018, 07:05 AM by ppppenguin.)
The vertical info visible for a second in this video is not teletext. It's VITC (vertical inteval timecode)
https://www.youtube.com/watch?v=0E0Jd8fi4No
I built the Wireless World teletext decoder c1976. I did it the hard way on matrix board (veroboard without copper strips) and got it working eventually. Part of the problem was that I didn't have a high quality off-air video source at home. Video tapped off my Thorn 2000 was mediocre, had to detune the set a little to get any result. It was much better at university. In the TV studio at imperial College we had a Decca off-air tuner and a very strong, clean signal. It worked a lot better there.
I hope Terry joins in this thread as I think he was responsible for a large teletext based systen at the London Stock Exchange.
https://www.youtube.com/watch?v=0E0Jd8fi4No
I built the Wireless World teletext decoder c1976. I did it the hard way on matrix board (veroboard without copper strips) and got it working eventually. Part of the problem was that I didn't have a high quality off-air video source at home. Video tapped off my Thorn 2000 was mediocre, had to detune the set a little to get any result. It was much better at university. In the TV studio at imperial College we had a Decca off-air tuner and a very strong, clean signal. It worked a lot better there.
I hope Terry joins in this thread as I think he was responsible for a large teletext based systen at the London Stock Exchange.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
