4 ms·

I would think there would be another cause of different results: chrominance being encoded at lower resolution, dynamically and spatially. So converting to RGB

by hxa7241 17y ago

I would think there would be another cause of different results: chrominance being encoded at lower resolution, dynamically and spatially. So converting to RGB then to gray would make it more quantised and blurrier . . . well, I haven't thought this through in detail, so I am not certain, but it seems a possible consideration . . . (since each channel of RGB is a weighted combination of all three YUV, each of RGB must be somewhat lower resolution, and that can't be recovered, so when converted to gray, that lower resolution must remain . . . so it seems it would be a deficiency . . . )

DarkShikari 17y ago
That's not lower resolution, that's lower precision. It's the difference between the number of samples and the accuracy of those samples. This has nothing to do with luminance range though. Even if the output samples only had 4-bit precision, it wouldn't make black into gray.
- hxa7241 17y ago
  I understand the difference, which is why I said 'lower resolution, spatially and dynamically'. Are you saying definitively that chrominance is not encoded at lower spatial resolution? I also said it might be another cause of difference, not the cause. Anyone might want to look at http://en.wikipedia.org/wiki/4:2:2 http://en.wikipedia.org/wiki/4:2:2 before simply assuming I am talking nonsense.