Here's an interesting video I stumbled upon. BBC football show Match of the Day used Laserdiscs to record footage from games and used them for action replays!
Here's an interesting video I stumbled upon. BBC football show Match of the Day used Laserdiscs to record footage from games and used them for action replays!
Well worth a watch to see the kit in action.
It sounds like the HS100! From "Revolutionary Technology" by David Matthewson:
Quote:
... The result was the broadcast disc player recorder type HS100, of which the BBC Television Centre in London purchased the first example in the UK in autumn 1968. Capable of replaying pictures at any speed between still frame and double speed, the HS100 worked by continuously recording, erasing and recording the last 36 seconds of signal fed to it. Rapid access to any part of the disc was possible, with a maximum access time of about 4½ seconds. The technology which made this possible was about the size of a large filing cabinet and needed a special vibration-free room to stand in — a far cry from a modern Laservision player.
From the technical standpoint the HS100 was based on magnetic recording and playback, the actual recording being made on the four faces of two nickel-cobalt/rhodium alloy discs. These 16-inch (40 cm) diameter discs ran at 3000 rev/min, thus giving one television field per revolution. This is an important point to grasp, as all current domestic disc systems that offer still-picture and fast- and slow-motion effects rely on recording with a discrete number of fields, usually two, per revolution. With the HS100, still frame was produced by continually scanning a signle track, while half speed was obtained by scanning every track for two revolutions of the disc.
I had a look in to the HS 100 and I think you are right. I found an image of it here and some great information. It looks like it was invented in 1968 and indeed was used for 'slo-mo' replays, mostly for live sports events. The image looks very similar to the machine used by the BBC for Match of the Day in the video I linked to.
Would be great if Techmoan or someone could source one so we might be able to see one in action or at least see the insides and how it worked.
Very interesting thread; looks a really advanced bit of kit for back in 1968, especially when I think what our TV looked like way back then e.g. like a box with 4 long stalky legs and a 14” screen dating from about 1957 and not to mention there were still regular steam hauled trains passing by our house too!
Wait till ldfan sees this - I’ll bet he’s wondering if it’s possible to fit an ac3 output on it somehow? (Sorry just a bit of fun!)
I've been watching this thread but haven't had the time to watch the videos. If it was for replays I doubt it would have had any audio, they would have commented over the video live like they do today.
But this is a very cool thing to see, now I'll have to make time to watch the videos posted.
I've been watching this thread but haven't had the time to watch the videos. If it was for replays I doubt it would have had any audio, they would have commented over the video live like they do today.
But this is a very cool thing to see, now I'll have to make time to watch the videos posted.
Yes I’m sure you are correct about no audio rein-o, a live commentary over the replay is as I seem to remember. Always thought it became the norm from the early 1970s though, never would have thought it came about back in the sixties.
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Thanks list
(Sorry just a bit of fun!)
