2k 2048x1080 over HSDL

[Jeff Brue]

Sorry if this was asked before, but I was just checking the red specs and it lists 2k RGB over HD-SDI... Is this 2048x1080 at 23.98 over HSDL ?

[jbeale]

What is HSDL? Not Homeland Security Digital Library, I presume, and not a typo for high-speed DSL, I also presume?

The only one I know is HD-SDI for High-Definition Serial Digital Interface.
( http://en.wikipedia.org/wiki/Serial_Digital_Interface )

[Nick Shaw]

HSDL stands for High Speed Data Link, and is a means for sending 2k over existing Dual Link HD-SDI infrastructures. It's used by data-ciné scanners. It can do 2048x1080 at 24fps, and higher resolutions at non real-time frame rates. See http://www.aja.com/pdf/support/AJA_2K_whitepaper.pdf

[donatello b]

i don't get why Aja is even talking 23.98/14.98 etc those are VIDEO rates .. why can't they just give us 24fps (as in exactly 24fps) ... i thought we were leaving video rates behind once we cross over to 2k and beyond??

[MikeCurtis]

2Kx1080: there is a SMPTE spec to do this over dual link HD-SDI

HDSL is usually used for 2Kx1556 film style frames...

[Nick Shaw]

2Kx1080: there is a SMPTE spec to do this over dual link HD-SDI

HDSL is usually used for 2Kx1556 film style frames...

As I understood it the SMPTE spec for 2k x 1080 @ 24 over dual link HD-SDI is what HSDL is. See the AJA white paper I referred to above, or page 4 of this (http://www.sgi.com/pdfs/3428.pdf).

[Jeff Kilgroe]

2Kx1080: there is a SMPTE spec to do this over dual link HD-SDI

HDSL is usually used for 2Kx1556 film style frames...

I'm with Nick, I thought HSDL is (or is a direct extension of) HD-SDI dual link. Also, I thought with was 2Kx1080 and 2Kx1536. ;)

[Nick Shaw]

I think there are both 1556 and 1536 variants of the standard. Who knows what the vital difference those 20 lines make is!

[Lucas Wilson]

I think there are both 1556 and 1536 variants of the standard. Who knows what the vital difference those 20 lines make is!

There actually is a good reason for the difference...

2048 x 1556 is full film frame with an open gate.
2048 x 1536 is full film frame with an Academy gate.

Lucas
-----
Master of Widgets
ASSIMILATE, Inc.
Los Angeles

[Jeff Kilgroe]

...Learn something new every day. :) Thanks for clarifying, Lucas.

[mezmo]

What is HSDL? Not Homeland Security Digital Library, I presume, and not a typo for high-speed DSL, I also presume?

The only one I know is HD-SDI for High-Definition Serial Digital Interface.
( http://en.wikipedia.org/wiki/Serial_Digital_Interface )

Hi jbeal,
A little more on HDSL.
HDSL can be had on somthing like a 4k Spirit in Datacine mode. A very expensive upgrade I'm told and as others have said here the idea is to
give you a fat & chubby 2048 x1556 style frame at about 15 FPS.
That's fast compared to some scanners. It should also give you 2048x1080.
at 24 FPS. very fast for 2k. All this makes film dump to data a reality at
speed. Speed similar to a normal telecine.
You could record out to a Kona 3 & Mac with large Disk Array or somthing like a Megacine, this will handle HDSL and has about a 1 Terabyte capacity.
Other DDR's are available, all still a little expensive at the moment.
Hope this helps. Mezmo

[Jeff Brue]

I guess I should have clarified more. Yes the smpte spec supports 23.98 2k defined as 2048x1080, it is defined as a form of HSDL. The only reason I ask is because it IS listed as a supported format, and that makes me wonder f I'll be able to capture a full uncompressed 2k red frame out to an external ddr.

As much as I trust and respect graeme, hollywood gets nervous when you say compression, and there are already proven workflows out that can deal with that HD-SDI on set capture, with much better meta data support than anything I expect on 1st gen red one.

As it looks like the Red RAID might be a while in coming, and really no one wants to deal with 4k (yet) those HD-SDI port out look rather interesting, at 2k. I wonder if they'll support a log format out...