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View Full Version : Blackmagic launch Decklink Quad SDI I/O card

zenvideo
12 Apr 2011, 14:48
Blackmagic Design have launched the Decklink Quad SDI I/O card at NAB 2011. From what I have read on their website, it is effectively four inputs and four outputs which can be used independantly, and is aimed at developers (meaning it has DirectShow filters, so should work with VidBlaster - with a bit of tweaking?) . http://www.blackmagic-design.com/products/decklinkquad/
Johan Lundberg
12 Apr 2011, 14:51
Saw this announcement too. Sounds like it should be the same as the Decklink duo, but with 4 separate channels. Great news! :)
Monoscopio
12 Apr 2011, 19:00
Noticed this one also. Really good news. This is what we have been waiting for a long time. 2 of these in a VB system would cover most proffessional needs of I/O. and at $995 this is a real bargain... Actually quite a bit cheaper than the analog quad cards I use today.
paulgagu
13 Apr 2011, 08:44
Hi guys,
I saw the Decklink Quad at @ blackmagic site and I think is awesome, want to see it working with VB, also dont know if someone can tell me why the Decklink 4K (coming next July) is cheaper ($595 versus $995) than the Quad if seems to have more features ?
Monoscopio
13 Apr 2011, 09:10
The 4k card is not 4 independent capture channels. Im not that familiar with the 4k standard, but in short terms the 4k video standard delivers one video stream over 4 sdi links. Perhaps Martin can explain this further.
zenvideo
13 Apr 2011, 10:58
The 4k card is not 4 independent capture channels. Im not that familiar with the 4k standard, but in short terms the 4k video standard delivers one video stream over 4 sdi links. Perhaps Martin can explain this further.

Broadly speaking the 4K standard is twice the width and twice the height, in terms of pixel sampling, of standard 1920x1080 HiDef, and therefore requires four times the bandwidth of regular HD video, hence needing four physical connection channels all working at around the standard HD-SDI speed. But, as Daniel says, it's only acting as a single output device carrying a single stream, and you can see that the board is physically smaller (with fewer components) than the Quad card, which probably explains the price difference.
paulgagu
13 Apr 2011, 11:42
Got it, Thanks guys you rock