RED ROCKET SINGLE vs DUAL LINK

[Mikael Lubtchansky]

Hello

a bit confused about this page : http://www.red.com/products/red-rocket

on the tech specs it says :
DVI (Digital) - (4) DVI-I via break-out cables
Serial digital 4:2:2 8/10 bit (single link) - 1BNC
Serial digital 4:2:2 8/10/12 bit (dual link) - 2BNC

I guess the last line should say 4:4:4 instead of 4:2:2 for the dual link modes.

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I played with my rocket and a sony OLED with a single 3G SDI input and still confused... from my RED ROCKET video out setup I have :

RGB 8 (8 bit RGB, won't work here as my SDI input is YUV)
YUV 422 8 bit (single link 8 bit, works)
YUV 422 10 bit (works, is it really 10 bit in 422 thru a single cable ?)
YUV 422 12 bit (works also, not listed on RED website, is it 12 BIT with a 422 signal ?)
YUV 444 10 bit (works on a single cable but I guess I'm not seeing the full signal as it should be dual link...)
YUV 444 12 bit (same)
RGB 10 and 12 bit (same as 8 bit, not useful in my case)

So my questions are...

- Is the RED ROCKET able to output YUV444 in 10 bit on a single SDI ? Could a firmware upgrade make it 3G compatible or is that hardware locked ?

- To go full 444 10 bit to a 3G monitor I still need to buy a HDLink or AJA box to merge the dual link into a single SDI, right ? What about 12 bit ?

Any comment or info would be helpful...

Ideally I'd want the best quality to grade properly but if 422 is 10 bit over a single cable then it might be good enough for now. I will try to shoot specific gradient in BW and color see if I can visually differentiate from YUV 422, 444 in 10 and 12 bit modes...

 

[Mikael Lubtchansky]

anyone ?

tia

 

[Eric Santiago]

anyone ?

tia

All I can add is that with our set-up of:

Mac Pro > CUBIX > RED ROCKET > RED BOB > AJA 3GM > Black Magic Video HUB > Flanders

I can only get RGB10 bit from RCXPro.

Its 3G SDI according to the Flanders.

 

[carmendeltoro]

DVI (Digital) - (4) DVI-I via break-out cables
Serial digital 4:2:2 8/10 bit (single link) - 1BNC
Serial digital 4:2:2 8/10/12 bit (dual link) - 2BNC

I guess the last line should say 4:4:4 instead of 4:2:2 for the dual link modes.

The last line is correct, has to do with color! I am no schooled engineer but it has been described to me as, well basically, it is carrying the needed :2:2 to add up and make 4:4:4 DUAL LINK (A and B LINK). here is wiki's response:
http://en.wikipedia.org/wiki/Chroma_subsampling

[h=3]4:4:4 Y'CbCr[/h]Each of the three Y'CbCr components have the same sample rate. This scheme is sometimes used in high-end film scanners and cinematic postproduction. Two SDI links (connections) are normally required to carry this bandwidth: Link A would carry a 4:2:2 signal, Link B a 0:2:2, when combined would make 4:4:4.
[h=3][edit]4:4:4 R'G'B' (no subsampling)[/h]Note that "4:4:4" may instead be referring to R'G'B' color space, which implicitly does not have any chroma subsampling at all. Formats such as HDCAM SR can record 4:4:4 R'G'B' over dual-linkHD-SDI.