SD recording downconvertor speed at DVinfo.net

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XH Series HDV Camcorders

Canon XH Series HDV Camcorders
Canon XH G1S / G1 (with SDI), Canon XH A1S / A1 (without SDI).


Reply
 
Thread Tools Search this Thread
Old April 19th, 2009, 06:07 PM   #1
Regular Crew
 
Join Date: Jan 2009
Location: Kingswinford, England
Posts: 25
SD recording downconvertor speed

I've noticed that when recording in SD that if I have a close up of some ones face which is in sharp focus if they start moving their head that the detail in the face is reduced almost like the focus is hunting but it's set to manual and anything that's not moving stays focused, I think it's because the downconvertor is not keeping up, a bit like a digital TV broadcast with a low bit rate, so I assume that when I get a PC that can handle HD that it will do a better job of downconverting when it doesn't have to do it in real time, am I right?
Mick
Mick Mearman is offline   Reply With Quote
Old April 19th, 2009, 06:55 PM   #2
Major Player
 
Join Date: Dec 2006
Location: Los Angeles, CA
Posts: 959
When you're shooting SD, it's not downconverting anything, it's already an SD signal. Maybe you have NR1 in your active preset or something?
Bill Busby is offline   Reply With Quote
Old April 19th, 2009, 07:24 PM   #3
Trustee
 
Join Date: Dec 2004
Location: Lipa City Batangas, Philippines
Posts: 1,110
Hi Mick. This sounds a bit like motion blur to me. What shutter speed are you using? The PAL cameras default to 1/25s in some cases so it's worth checking that.

Richard
Richard Hunter is offline   Reply With Quote
Old April 20th, 2009, 04:24 PM   #4
Regular Crew
 
Join Date: Jan 2009
Location: Kingswinford, England
Posts: 25
Quote:
Originally Posted by Bill Busby View Post
When you're shooting SD, it's not downconverting anything, it's already an SD signal. Maybe you have NR1 in your active preset or something?
Thanks for the replies but if you record SD on a HD camera there has to be a downconversion from the HD CCD's to get SD

I checked my settings both noise reductions are off and the shutter is 1/50
Mick
Mick Mearman is offline   Reply With Quote
Old April 20th, 2009, 05:34 PM   #5
Major Player
 
Join Date: Dec 2006
Location: Los Angeles, CA
Posts: 959
I understand what you imply, but maybe it's just a play on terms here. "Downconversion" to me means an original hirez signal is converted to a lower rez signal on the fly. That's not really what's happening when you have your camera set to record SD. It's a simple signal switch. That's my point... it's already SD, hence there's nothing to "downconvert". There's no HDV to SD conversion constantly going on.

Anyway, I think there's some other issue going on. Are you referencing the LCD screen while noticing this? It already has a bit of image lag as it is... and/or if you're looking at footage on some other LCD monitor it's possible there's image lag inherent with that monitor as well. Try a CRT if you have one and see if it's the same issue.
Bill Busby is offline   Reply With Quote
Old April 20th, 2009, 06:10 PM   #6
Trustee
 
Join Date: Jun 2006
Location: Burbank
Posts: 1,811
You might try recording in HDV and doing the down conversion on capture. This might yield better results.

I have not been impressed by straight SD recording on the XH-A1, and I believe others have made similar comments.
Jack Walker 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 > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XH Series HDV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 11:58 AM.


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