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#apertus IRC Channel Logs

2013/12/07

Timezone: UTC


00:09
theverant
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intracube_afk
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03:04
troy_s_
FergusL: R3D internals?
03:17
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09:59
Bertl
morning everyone!
10:42
guesst
morning, sebastial told me you know what are the limitations of the hdmi on the zedboard
10:42
guesst
is it yuv or 422 or both?
10:49
Bertl
from the datasheet and the zedboard schematic, we are limited to YCrCb in up to 10bit
10:49
Bertl
but I figured that we can enable a mode, which is basically RGB-422 by setting the color conversion to pass through
10:50
Bertl
or more precisely RGB-242
10:50
Bertl
i.e. the green value can be set for every pixel, the red and blue apply for two pixels and get interpolated
10:51
Bertl
but we can't do 444 in any color scheme, because the zedboard design made an unfortunate decision with picking data 8 to 23
10:56
guesst
i think rgb 422 is not worth it.. ycbcr 422 should be a better option (in terms of consequent data compression)
11:18
Bertl
maybe, the thing is, the RGB-242 fits the bayer pattern, so it might be simple yet more accurate in positioning ... but we'll see, RGB -> YCrCb isn't that hard to do
11:58
intracube
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se6astian
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se6astian
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18:54
troy_s
guesst: It isn't YUV. That is analog.
18:55
troy_s
guesst: And YCbCr 422 is an alternate model. RGB can be transformed with to YCbCr with no loss assuming sufficient depth.
19:04
troy_s
(And RGB would provide a display referred linear, which is never a bad option. YCbCr is TRC applied (Y'Cb'Cr'))
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jucar
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19:28
guesst
i prefer raw :)
20:34
troy_s
guesst: You realize that RGB 422 _is_ effectively raw? It is a meaningless term, but more on point, your particular query was related to HDMI. I respect that your candor has shifted from outright trolling, however.
20:34
troy_s
FergusL: On that point, did you manage VNG? Interested in the chroma citing.
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