Narrow-Bandwidth Television Association

Just uploaded recently. It shows an interesting example of NBTV compressed to work within the bandwidth of a normal 45 RPM record. He also touches on early recordings by Baird and mechanical TV

https://www.youtube.com/watch?v=UtNGVb94TFE

Impressive. I own an old "TED Bildplattenspieler" from Telefunken, made in 1975. It uses also vinyl records, has crude colour pictures, but a reasonable sound quality. One records plays for 10 minutes. The disc spins with 1,500 RPM, for the picture it uses a special extra fine diamond, which will be polished before every use. The grooves are 40 times smaller than on a normal record. If you would combine that old technology with VinylVideo, full HD 90 minutes recordings on a 30 cm disc should be possible. But it wouldn't be cheap...

DrZarkov wrote:Impressive. I own an old "TED Bildplattenspieler" from Telefunken, made in 1975. It uses also vinyl records, has crude colour pictures, but a reasonable sound quality. One records plays for 10 minutes. The disc spins with 1,500 RPM, for the picture it uses a special extra fine diamond, which will be polished before every use. The grooves are 40 times smaller than on a normal record. If you would combine that old technology with VinylVideo, full HD 90 minutes recordings on a 30 cm disc should be possible. But it wouldn't be cheap...

Interesting i heard of some thing similar looks like its a play only machine from the video ?

youtu.be/PEyFw0SOJrM

Yes, it's a play only device.

Oh yes, in 1972 (about) I have seen the Telefunken TED bildplatte playing. The people at Philips Nat.Lab. were afraid of it. It was an enemy system to our optical VLP disc (later on called laservision). I remember the unsharp pictures as they used a line sequential R-G-B signal, which lines were delayed by two lines to reconstruct a PAL- or RGB-signal as an output. That gave a reduction in vertical resolution by a factor of 3, if not 6 because of the interlace. It was called: "Tripal", although it was no PAL at all. What is in a name.

And I remember the wear of the disc, which was noticable after you played it several times. Just like vinyl grammophone records. I also observed that in the VinylVideo film: rather large drop-outs. The more you play it, the more you get of them. It looks to me as a Low-Tech-Moan system.