JVC GY-HD100 can record 720/60P? at DVinfo.net

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Old April 18th, 2005, 03:54 PM   #1
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JVC GY-HD100 can record 720/60P?

It states the following from camcorderinfo.com....

"In addition to this the camcorder can record 720/30P, 720/60P, 480/60i, and 480/24P."

I thought it was only able to output 720/60P. Is that statement accurate that it can also record 720/60P?

Thanks
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Old April 18th, 2005, 04:40 PM   #2
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720/p60 output

720/p60 is output only:
From GY-HD100U features page:
http://pro.jvc.com/prof/Attributes/f...&feature_id=01
"Live 720/60P analog component output"

From U.S. announcement press release:
http://pro.jvc.com/prof/Attributes/p...&feature_id=08
"In addition to providing HD true progressive 24 P superior quality recordings, the GY-HD100U outputs uncompressed 720/P60 HD, making it ideal for live broadcasting, remote news and POV applications. An optional module converts the uncompressed signal to HD-SDI for use in a variety of user environments."

Last edited by Don Crockett; April 18th, 2005 at 04:44 PM. Reason: added additional link on component 60p output
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Old April 18th, 2005, 05:52 PM   #3
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Quote:
Originally Posted by Don Crockett
720/p60 is output only:
From GY-HD100U features page:
http://pro.jvc.com/prof/Attributes/f...&feature_id=01
"Live 720/60P analog component output"

From U.S. announcement press release:
http://pro.jvc.com/prof/Attributes/p...&feature_id=08
"In addition to providing HD true progressive 24 P superior quality recordings, the GY-HD100U outputs uncompressed 720/P60 HD, making it ideal for live broadcasting, remote news and POV applications. An optional module converts the uncompressed signal to HD-SDI for use in a variety of user environments."
Could a JVC 30K D-VHS deck record that 60p signal? I would hope so. :)
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Old April 19th, 2005, 12:50 AM   #4
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Quote:
Originally Posted by David Gomez
Is that statement accurate that it can also record 720/60P?
Definitely not. I asked one of their Japanese engineers that directly, and they unequivocally said "no".
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Old April 19th, 2005, 09:42 AM   #5
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I like the uncompressed HD-SDI.

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Old April 21st, 2005, 04:25 AM   #6
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Uncompressed from compressed?

Does anyone know if the video from the uncompressed analog output has been through all processing (even HDV encoding) or is it straight from the CCD at let say... 4:4:4?
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Old April 21st, 2005, 04:46 AM   #7
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Oops

Sorry about that... it's been answered here
http://www.dvinfo.net/conf/showthread.php?t=43308

Still wander if the 4:2:2 signal has been through a lot of processing? I have a GY DV500 and it's analog output is derived from the compressed signal wich is of no use for high quality recording... Just want to make sure it's not 4:2:0 compressed brought back to 4:2:2 uncompressed!
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Old April 25th, 2005, 08:06 PM   #8
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720/60i

what's the problem with 720/60i ? isn't it the same bandwidth as 720/30p ? it sure would be useful to have it recorded to the onboard recorder so why doesn't the HD100 support it? could it be a firmware upgradeable feature?
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Old April 25th, 2005, 08:15 PM   #9
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Quote:
Originally Posted by Joe Hudson
what's the problem with 720/60i ? isn't it the same bandwidth as 720/30p ? it sure would be useful to have it recorded to the onboard recorder so why doesn't the HD100 support it? could it be a firmware upgradeable feature?
There's no such format as 720/60i. In HD, all 720 is progressive always, there's no interlaced version of 720.
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Old April 25th, 2005, 08:42 PM   #10
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ah, ok, cheers Barry. shows how much I know. still it would be useful for a more live look...
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Old April 25th, 2005, 09:21 PM   #11
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Well, actually, that's what 60p does for the 720 mode. 720/60p gives the same live/reality look that 60i does in NTSC. Well, better actually because there's no interline twitter or flicker or comb artifacts, but the point remains: 60 samples per second = "reality" images.
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Old April 26th, 2005, 05:36 AM   #12
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Quote:
Originally Posted by Murad Toor
Could a JVC 30K D-VHS deck record that 60p signal? I would hope so. :)
Interesting question. I wonder the same thing.
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Old April 26th, 2005, 09:27 AM   #13
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Tech companies will quickly produce affordable accessories to function as workarounds for utilizing the HD100's uncompressed analog component output. Where there is demand, someone will step up to fill the need.

The existing component to HD-SDI converters were designed for larger cameras, and they're very expensive. A stop by the Miranda booth at NAB illustrated that. What will be produced shortly by other companies that service the more affordable product market, are inexpensive component to HD-SDI converters that are small, thus very suited for use with the HD100. If the same converters also had a Firewire bus and the ability to compress the uncompressed component input to HDV 720p60 for output to an affordable clamshell HDV deck that could record in all the resolutions and frame rates of the HDV spec, including 720p60, the user of the converter would have two pathways for using 720p60 from the HD100:

1) Pass through 720p60 4:2:2 uncompressed to the small converter mounted on the camera, output the HD-SDI from the converter to a computer, with a raid array, and multiple TB storage. Computers are getting faster every month, raid arrays are getting more capable, and storage in TB is plummeting in cost. For certain projects and budgets this would be a viable workflow.

2) For mobile production of high-speed sports, reality, etc, the compressed HDV 720p60 4:2:2 (or 4:2:0) output of the converter via Firewire (mounted on the camera) would be recorded to tape on the clamshell deck, or a modified Firestore HDD, worn on a belt pack. The footage would then be available for non-live posting, including enhanced ability to do slo-motion and compositing. The clamshell deck or Firestore HDD would obviously have many other production uses. One use for the clamshell deck would be exactly the workflow I've been using for network television POV shots: lipstick cameras wired to clamshell decks in protective backpacks. There will be affordable 720p/1080i lipstick and cigar cameras on the market shortly.

This week, after seeing ADS Technology release an affordable, small component to SDI converter, I e-mailed the tech staff at ADS with my suggestion for the mobile, affordable component to HD-SDI converter for use on the HD100. They thanked me profusely for the suggestion and indicated that they would be analyzing the possibilities on that real soon.
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