News for hackers. Stuff that matters.

A comment on Bouncing DVD Logo. Parent comment

Re:Bouncing DVD Logo by TylerE on Thursday April 16, 2020 @10:22AM (#22889644)
Actually you didn't. There were many countries that used PAL for TV broadcasts but have 60hz AC.
[ Parent | on HN ]
Re:Bouncing DVD Logo by hunter2_ on Thursday April 16, 2020 @08:50PM (#22895168)
They didn't say PAL, they said "50 Hz TV."

PAL and 50 Hz TV are not synonymous. Brazil has 60 Hz AC and uses PAL-M which is 60 Hz TV. AC=TV even in these odd cases.

Old CRTs couldn't possibly clock their flyback to anything but mains.

[ Parent | on HN ]
Re:Bouncing DVD Logo by aasasd on Thursday April 16, 2020 @11:09AM (#22890157)
Hmm, afaik the framerates were chosen to be equal to the AC freq so that there are no glitches in the image. Do those countries have converters or something in the TVs, or did they watch jumpy image?
[ Parent | on HN ]