Quality benefits of uncompressed? at DVinfo.net

Go Back   DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC GY-HD Series Camera Systems

JVC GY-HD Series Camera Systems
GY-HD 100 & 200 series ProHD HDV camcorders & decks.


Reply
 
Thread Tools Search this Thread
Old July 7th, 2006, 09:39 AM   #1
Regular Crew
 
Join Date: Sep 2005
Posts: 152
Quality benefits of uncompressed?

Hi

Does anyone know what the acctual quality gain is if you capture uncompressed rather than HDV. I mean image for image is there much difference to the eye?

Thanks

Trevor
Trevor Allin is offline   Reply With Quote
Old July 7th, 2006, 09:59 AM   #2
Regular Crew
 
Join Date: Jun 2006
Location: Fort Worth TX
Posts: 69
Are you asking about running off of the Camera's YRB outputs? There is some gain to be had by that, in that you are skipping a lossy MPEG2 step, but you're tethered to a expensive deck

After recording to tape simple answer is that; for straight video, there is no gain. You can't get more information than was actually recorded onto the tape.

However, if you are adding graphics or doing any sort of compositing, adding effects, layers, transitions, what have you... You can benefit from the increased quality of an uncompressed codec.
Adam Oas is offline   Reply With Quote
Old July 7th, 2006, 10:05 AM   #3
Trustee
 
Join Date: Apr 2005
Location: Santa Cruz, CA
Posts: 1,116
Trevor.
Keep in mind that the HD100 doesn't give you uncompressed signal, even when using Component out. That output gives you a "less compressed" signal, one that is not so crushes as the HDV one. An uncompressed signal would give you 4:4:4 color representation, component out gives you 4:2:2 instead of 4:2:0. That's the main advantage and yes, you can see the difference.
In addition, the better color coding gives you a better starting point for chromakey.
__________________
Paolo http://www.paolociccone.com
Demo Reel
Paolo Ciccone is offline   Reply With Quote
Old July 7th, 2006, 04:57 PM   #4
Major Player
 
Join Date: Jul 2003
Location: Warren, NJ
Posts: 398
Is that the same for the other cameras in the shootouts or do they provide uncompressed output?
David Ziegelheim is offline   Reply With Quote
Old July 7th, 2006, 06:02 PM   #5
Major Player
 
Join Date: Apr 2005
Posts: 512
Calling an analog signal 4:anything:anything is not entirely accurate, since those numbers are referring to digital sampling rates. It's all dependent on the digital sampling rate of the deck you use to capture. Also, 4:2:2 can still be considered "uncompressed."
Stephan Ahonen is offline   Reply With Quote
Old July 8th, 2006, 02:13 AM   #6
Regular Crew
 
Join Date: Sep 2005
Posts: 152
Hi thanks for the replies.

I notice that DV Rack will capture 422 shortly but only through firewire. Anyone know how to convert from component to firewire?

Thanks

Trevor
Trevor Allin is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > JVC ProHD & MPEG2 Camera Systems > JVC GY-HD Series Camera Systems

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 08:57 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network