Comment on How are 144hz screen possible?

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MeanEYE@lemmy.world ⁨1⁩ ⁨year⁩ ago

They are related. Black and white TV was fine and running at 30 frames for obvious easy timing since USA grid is 60Hz, but then introduction of color caused interference between chroma channels. So signal became backwards compatible, luminance channel was black and white while color TVs used two additional channels for color information. Whole 29.97 was a result of halving 60/1.001≈59.94. That slowing down of 0.1% was to prevent dot crawl, or chroma crawl. So all of today’s videos in 29.97, even digital ones, are in fact due to backwards compatibility with B&W TV which no longer exist and certainly pointless when it comes to digital formats.

On the other hand 24fps was just a convenience pick. It was easily divisible by 2, 3, 4, 6… and it was good enough since film stock was expensive. Europe rolled half of their power grid which was 50Hz, so 25… and movies stuck with 24 which was good enough but close enough to all the others. They still use this framerate today which is a joke considering you can get 8K video in resolution but have frame rate of a lantern show from last century.

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