[IMPOSSIBLE] HDMI 1.3 RGB 4:4:4 10bit output for HP DreamColor compatability

[greggreenhaw]

Is there any way to output RGB 4:4:4 10bit to enable full dreamcolor monitor support. The dreamcolor engine required 10bit rgb 4:4:4 to function. It is by far the the cheapest 10bit display out there. I got one used in the box for $900 USD on ebay w/ 1 hour of use.

[chmee]

i think not, especially in combination with raw i guarantee

[ItsMeLenny]

4:4:4 over HDMI would require 2 HDMI ports on the camera.
With only 1 HDMI port the maximum you could stream across it in any situation is 4:2:2.
The second HDMI port then does 0:2:2.

[Audionut]

4:4:4 over HDMI would require 2 HDMI ports on the camera.

https://en.wikipedia.org/wiki/HDMI#Audio.2Fvideo

Support for the YCbCr color space and higher color depths ("deep color") is optional. HDMI permits sRGB 4:4:4 chroma subsampling (8–16 bits per component), xvYCC 4:4:4 chroma subsampling (8–16 bits per component), YCbCr 4:4:4 chroma subsampling (8–16 bits per component), or YCbCr 4:2:2 chroma subsampling (8–12 bits per component).[53][54] The color spaces that can be used by HDMI are ITU-R BT.601, ITU-R BT.709-5 and IEC 61966-2-4.[53]

https://en.wikipedia.org/wiki/HDMI#Version_1.4

HDMI 1.4 was released on May 28, 2009.........and introduces.........expanded support for color spaces, with the addition of sYCC601, Adobe RGB and Adobe YCC601;

[1%]

600D has some kind of 4:4:4 display mode, the buffer is still 4:2:2 but the display has a color change. In the firmware it says 4:4:4... but I think this is auto-detected in edid data, it should work with your monitor already on new cameras.

[chmee]

4:4:4 is less the problem, but 10bit/channel output?
did anyone of you have found (while experimenting with the hdmi output) a bitdepth-switch?

[Ash McKenzie]

Dream color engine should just fine with 4:2:2 but it's very strict about its 10bit requirement I'd say no dice

[greggreenhaw]

Its the opposite, The DreamColor engine needs 8 or 10bit RGB. Macs only support 8bit output so it does support 8bit. Its really jsut a simple yuv to rgb conversion. If the raw video is 14bit I think it would be possible to convert to 10bit.

This AJA sdi to hdmi conversion does teh very thing. Converts yuv to rgb on the fly.

http://www.aja.com/en/products/mini-converters/hi5-3g/#overview

[a1ex]

If you think it can be done, why don't you implement it?

[greggreenhaw]

I wish I could. I just don't know hardware programming.

[greggreenhaw]

http://www.codeproject.com/Articles/402391/RGB-to-YUV-conversion-with-different-chroma-sampli

[a1ex]

FYI, you don't even have CPU resources for a real-time 720x480 memcpy.