| General > General Technical Chat |
| The Mehikon - broadcast TV color eraser |
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| newbrain:
--- Quote from: tooki on August 21, 2020, 10:21:23 am ---With regards to CRT TVs? Absolutely. It’s clearly visible, especially in peripheral vision. --- End quote --- I can relate to this. No superpowers, but a kid I was nauseated by TV flicker (50 Hz), and I could not understand how people endured fluorescent lights. Now, it's been ~10 years since I looked at a CRT (wow, never thought of that!), but for fluorescent lights at least, I don't notice it any longer. I changed for sure, they might have too... |
| eti:
Was it designed in "Mehiko"? :P |
| NiHaoMike:
--- Quote from: Bud on August 21, 2020, 01:54:29 pm ---..and you would get horrible flicker as a bonus --- End quote --- The display can be refreshed 2 or more times per frame. That's how classic 24 FPS movie projectors don't flicker. --- Quote ---All that shenanigan just because someone wanted even 30Hz ? --- End quote --- Checkboarding and frame rate are independent. The best solution is to just do 1080p at 60 FPS and compress more to stay within bandwidth limits, but if sending half frames at 60Hz has to be done, the artifacts introduced by a checkboard pattern is much less noticeable than interlacing. Actually, checkerboarding really is a slight modification to interlacing. --- Quote from: newbrain on August 21, 2020, 03:09:42 pm ---but for fluorescent lights at least, I don't notice it any longer. I changed for sure, they might have too... --- End quote --- They definitely have, pretty much every CFL has used an inverter since the early 2000s. |
| BrianHG:
--- Quote from: tooki on August 21, 2020, 05:16:57 am --- (How many CRT HDTVs are there out there, really??) --- End quote --- What the hell. My 37inch multiscan Mitsubishi back in 1993 did HDTV in RGB fine once the standard became available. Ok, well, brand new at the time, it was a 20K$ monitor. And yes, 5 years later when I could finally reliably play DVDs on a PC, I ran the screen at 72fps progressive making the motion in movies perfectly v-synced. Well, once in awhile, you could catch a dropped frame as the video card's 72Hz wasn't in perfect tune with the DVD player software of the time which I believe locked onto the sound card's 48KHz clock since it had to sync AC3 without disruption. My desktop screens were all running at either 96Hz or 120Hz. No flicker at all. |
| vk6zgo:
With the invention, & subsequent miniaturisation of frame stores, system conversion has become a trivial task. A bit off topic, (but close to the sub-topic of things the eye can perceive), have you ever turned your head quickly whilst gazing at an analog 'scope screen from mid-distance? It looks as if the time/div setting has been reduced &, to me, is most obvious when looking at a sine wave-----the strobing effect of your motion makes you see less cycles spread out further on the screen. I don't think it would work with a DSO, though. |
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