From: nowhere@never.at   
      
   On 11/02/2023 18:32, muta...@gmail.com wrote:   
   > My understanding is that European TVs did a scan from   
   > top to bottom 50 times a second, but it was only ever   
   > every second row (ie interlaced).   
   >   
   > There were only 25 genuine frames per second.   
   >   
   > And the 50 Hz was a limitation of light decay from   
   > phosphor.   
   >   
   > For the goal of "beating the human eye" as far as   
   > smooth motion is concerned, I don't know what the   
   > number is. 25 may be overkill.   
      
   no it's not overkill in terms of health and comfort.   
   Higher frequency gives you lesser headache and you can   
   watch longer before eyes start yo blur.   
      
   > And my understanding is that with monitors, especially   
   > LCD monitors, 50 Hz is not a consideration.   
      
   Most European power-grids are at 50 Hz and it was cheap   
   to use this as a frame time base. But newer Monitors and   
   Graphic cards prefer 60 Hz which gives you comfortable   
   30 fps on LCD or plasma.   
      
   > So.   
   >   
   > If I want to display a cartoon on a monitor, using PDOS,   
   > how many frames do I need to draw per second?   
   > The only timer I have that I'm aware of is 18.2 ticks per second.   
      
   the PIT timer is programmable, mine runs at 1.0 KHz aka 1 mSec.   
      
   > So what I can do is display one frame, and then, if I displayed   
   > it quickly enough, I can wait for the next tick to arrive.   
      
   > So my question is - is 18 frames per second enough to beat   
   > the human eye, at least for cartoons?   
      
   enough to have your toons look as moving smooth, but I wouldn't   
   recommend to watch such for longer periods.   
      
   It's not for nothing that all my monitors work 30fps or more.   
   But the main speed issue is the amount of data per frame, so   
   many modern games break frames down to avoid flicker.   
   __   
   wolfgang   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)