07-11-2020, 11:37 PM
(06-11-2020, 06:47 AM)ppppenguin Wrote: 819 was definitely pushing the technology of the time. But it was a plasusible attempt, since the standard allowed headroom for the technology to improve and fully exploit the lines and bandwidth. But it didn't work out in the end. France was left stranded with 819 just as the UK was with 405.
It needed digital transmission, with powerful data compression, to move beyond 625 for everyday use. Yes, there were attempts at 1125 analogue, notably in Japan, but they never gained a critical mass.
At the studio end, I look back on the work I did designing analogue vision mixers and how hard it was to get really good results. I did just one rather simple digital vision mixer and the problems just melted away.
In France 819 lines needed all the VHF bands I & III along with some clever overlaps to carry just one channel nationwide.
Some of the 1992 Olympic games were shot using 1125 line analogue cameras supplied by Sony.
