On Tue, Jul 15, 2025 at 7:57 PM Mark Filipak <markfilipak.i...@gmail.com>
wrote:

> On 15/07/2025 15.40, Paul B Mahol wrote:
> > On Tue, Jul 15, 2025 at 7:34 PM Mark Filipak <markfilipak.i...@gmail.com
> >
> > wrote:
>
> >>            Y element, pixels 0..3
> >>           /    Cb element, pixels 0..3
> >>          /    /    Cr element, pixels 0..3
> >>         /    /    /
> >> 4:4:1  ¤¤¤¤ ¤¤¤¤ ¤¤¤¤ —— lines in field 0
> >>        ¤¤¤¤ ¤••• ¤••• —— lines in field 1
> >>
> >> 4:2:1  ¤¤¤¤ ¤•¤• ¤•¤•
> >>        ¤¤¤¤ ¤••• ¤•••
>
> Well, Paul, you're the expert. Are those two correct? If they are, then
> I'm right about how the
> tokens work and the folks at wikipedia are wrong. I don't care whether the
> wikipedia folks are right
> or wrong because I don't pay wikipedia any mind because I think wikipedia
> is a train wreck. I want
> to be right because I want to be knowledgeable so I can help myself and so
> I can help other people.
>

For 4:2:0

its for 4x4 luma block you have 2x2 block chroma

Your attempts to explain it with ascii are comical.


>
> --Mark.
>
>
>
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