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May 16th, 2008, 06:42 AM
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#1 |
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Major Player
Join Date: Nov 2007
Location: Paris, France
Posts: 210
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EX1 HD-SDI output format
Hi,
There was a long talk about the 4:2:0 / 4:2:2 output. My question here is more about the frame rate. What is the output format of the HD-SDI of the EX1 ? Is it dependent of the camera format or frame rate ? Is it always 1080@50i with pulldown or so ? I'm asking this because I saw a 8" LCD monitor with HD-SDI input, but only compatible with 720P and 1080I, not 1080p... I want to be sure I can use this monitor with the EX1, but also with many other camera, like sony F900 or Varicam. Thanks. |
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May 16th, 2008, 07:34 AM
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#2 |
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Major Player
Join Date: Jan 2008
Location: Utrecht, NL | Europe 3rd Rock from the Sun
Posts: 612
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Can't verify it but if I recall correctly it's always 1080@60i with pulldown.
The "upcoming" firmware update has been roumored to contain an update to also be able to output 1080@24p over HD SDI. George/ |
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May 16th, 2008, 07:37 AM
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#3 |
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Inner Circle
Join Date: Apr 2006
Location: Wales
Posts: 2,130
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Can't verify either, but I thought it was 50/60i when going to media (card) but HD-SDI was whatever was set (720/50P etc.)
Steve |
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May 16th, 2008, 07:44 AM
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#4 |
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Major Player
Join Date: Nov 2007
Location: Paris, France
Posts: 210
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I would like someone to confirme.
As far as I remember, even Sony F900 output 1080@24PsF, which means it is always interlaced, with double frame rate and progressive image cut in two fields... Anybody having an intelligente SDI monitor or card or Astro to confirm that ? Thanks. |
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May 16th, 2008, 07:50 AM
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#5 |
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Inner Circle
Join Date: Apr 2006
Location: Wales
Posts: 2,130
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Again, I think that's to tape on the F900, not neccessarily via the HD-SDI. But can't confirm, sorry, we need a real expert here!
Steve |
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May 16th, 2008, 08:19 AM
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#6 |
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Major Player
Join Date: Jan 2008
Location: Utrecht, NL | Europe 3rd Rock from the Sun
Posts: 612
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The SDI follows the YPbPr HD output, manual page 117.
George/ |
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May 22nd, 2008, 02:36 AM
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#7 |
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Major Player
Join Date: Nov 2007
Location: Paris, France
Posts: 210
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OK. That's an answer.
I would also like to have someone with a HD-SDI card or monitor or oscillo to confirm, but as I read somewhere else, 1080p is not supported in HD-SDI. Only interlaced and doubble frequency for PsF. Thanks. |
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May 22nd, 2008, 04:48 AM
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#8 |
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Inner Circle
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,421
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Normal HD-SDI is "Single Link" which runs at 1.485 Gigabits per second.
Dual Link HD-SDI consists of two "Single Link" HD-SDI links and supports 4:4:4 whereas normal HD-SDI only supports 4:2:2. Also, 1080p would require Dual Link HD-SDI (as I understand it) or the new 3 Gigabit per second version. The 3 Gigabit per second version of HD-SDI should support 1080p, but this is a specialty item that is fairly new. You camera determines what flavor of HD-SDI that you have. The Sony EX1/EX3 and the Canon models are Single Link HD-SDI at 1.485 Gigabits per second. Only high-end cameras support Dual Link.
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Dan Keaton Augusta Georgia |
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May 22nd, 2008, 05:14 AM
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#9 | |
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Major Player
Join Date: Jan 2008
Location: Utrecht, NL | Europe 3rd Rock from the Sun
Posts: 612
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Quote:
It has been rumoured that an upcoming firmware update will allow 1080P24 without pulldown over SDI out. George/ |
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May 22nd, 2008, 05:24 AM
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#10 |
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Regular Crew
Join Date: Jan 2008
Location: New York, NY
Posts: 188
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As far as my scope tells me, along with an AJA io box, in 1080p24 the sdi outputs 1080i60. As previously stated, this will change with an upcoming firmware update. As far as the F900, you get the format you're shooting in. Keep in mind though that the F900 usually shoots in a Psf mode, which is not the same as interlace. The frames are split in half and recorded with essentially an interlace tape head, but the signal does not read as interlace. Most monitors with HD-SDI will handle any signal you can give them, but if you want to use it with an F900 make sure it can handle Psf.
-Sean |
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May 22nd, 2008, 10:10 AM
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#11 | |
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Major Player
Join Date: Jan 2008
Location: Utrecht, NL | Europe 3rd Rock from the Sun
Posts: 612
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Quote:
This means the interlaced fields contain two halves of the same (progressive) image without any temporal difference, unlike with interlaced footage where the fields are 'recorded' ~1/60th of a second apart. When you remove the pulldown on ingest you have a true progressive 24p file for post. George/ P.S. Never use de-interlace on PsF/pulldown footage as this will make a mess of it. |
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May 23rd, 2008, 12:03 PM
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#12 |
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Starway Pictures
Join Date: Jul 2005
Location: Studio City
Posts: 581
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The HD-SDI spec will always be 60i. Firmware change or not. The actual signal coming out of the spigot HAS TO BE 60i. The firmware is probably only flagging the proper frames (like HDCAM decks do) so that the NLE can properly apply 3:2 on ingest.
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May 23rd, 2008, 01:24 PM
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#13 |
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Inner Circle
Join Date: Dec 2004
Location: Arlington, TX
Posts: 2,231
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This is confusing, but to be clear, the end result in the computer will be 1080p 24 or 30 fps if the camera is set to 1080p correct?
Not a 1080i interpretation with lower resolution.? |
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May 23rd, 2008, 03:00 PM
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#14 |
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Major Player
Join Date: Jan 2008
Location: Utrecht, NL | Europe 3rd Rock from the Sun
Posts: 612
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Yes.
No. George/ |
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May 23rd, 2008, 07:59 PM
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#15 |
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Inner Circle
Join Date: Dec 2004
Location: Arlington, TX
Posts: 2,231
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Thanks for your reply
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