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A comment on H.264 is magic (2016). Parent comment

Re:H.264 is magic (2016) by kevin_thibedeau on Friday May 24, 2019 @12:08AM (#19998406)
There is a physiological reason that you can't resolve the chroma at the same resolution as the luminance.
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Re:H.264 is magic (2016) by blt on Friday May 24, 2019 @12:11AM (#19998417)
But even after you decide to allocate << 50% of your information bandwidth to chroma, there may still be ways to use that allocation than are more effective (perceptually) than 2x downsampling.
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Re:H.264 is magic (2016) by pingucrimson on Friday May 24, 2019 @10:12AM (#20001692)
This. Subsampling is kind-of the most primitive method of "lossy compression" there is.
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