18 ms·
As I understand it, this only works with still images that scroll vertically. Each revolution is one frame, so if you compare the data paths next to each other
by geon 7mo ago
As I understand it, this only works with still images that scroll vertically.
Each revolution is one frame, so if you compare the data paths next to each other, they don't make up an image but the same single line of several consecutive frames.
Scrolling a still image makes the same line on the screen cover a different part of the image each frame, so you can sort of make out what the original image looked like.
The end credits should show up as a single tall image, since the only limit to the height is the radius of the disc.
- sixothree 7mo agoGreat points. And it just so happens in this video that the scrolling was at a speed where everything was preserved and also not stretched. Too slow and it would be elongated vertically on the disc and too fast and it would be compressed and you'd miss information.
- harrall 7mo agoIf I’m not mistaken, it also doesn’t work with LaserDiscs… it works only with CEDs. The title is a bit misleading. LaserDiscs are digital but CEDs are analog. Very different technologies.
- NoMoreNicksLeft 7mo agoI was under the impression that laserdisc encoded the video signal in analog. Some (all?) audio tracks were digital/pcm, however.
- itisit 7mo agoLaserDiscs are not quite a digital medium. The video is an FM analog signal (composite). Digital PCM audio was introduced about half a decade into the format's life.