High frequency flicker in DV 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 September 30th, 2007, 07:09 PM   #1
Regular Crew
 
Join Date: Nov 2005
Location: Milan/Italy
Posts: 63
High frequency flicker in DV

Hi all.
Testing DV 25f on XH-A1 vs. my DVXa.
I see a very troublesome flickering on fine straight lines (vertical, horizontal it doesn't matter). Lowering sharpness a lot does reduce it, but then I prefer my DVX, also with his noise on dark areas.
Any suggestion? Coring? H detail? V detail?
I see nobody mention this problem. Is it because it isn't an issue when shooting hdv?
Thanks
Alvise Tedesco is offline   Reply With Quote
Old September 30th, 2007, 07:30 PM   #2
Major Player
 
Join Date: Mar 2007
Location: Philly,PA
Posts: 360
Yes, I find that same issue as well in DV. The A1 is made for HDV.
Shoot in HDV and downconvert to SD for the best results.
Eric Weiss is offline   Reply With Quote
Old September 30th, 2007, 10:59 PM   #3
 
Join Date: Nov 2001
Location: santa fe, nm
Posts: 3,264
Images: 10
try encoding to a progressive(deinterlaced) output
Bill Ravens is offline   Reply With Quote
Old October 1st, 2007, 06:31 AM   #4
New Boot
 
Join Date: May 2005
Posts: 7
Hello, I think I can help.
This camera does not work at its best when shooting in SD. This is because the lens and imaging sensors are designed for HD pictures, these high frequencies need to be suppressed before down conversion. The camera uses simple inadequate downconversion filtering which you see as aliasing in your picture.
The problem can be resolved by fitting an optical diffuser on the lens. Try a 1/4 Black Promist or similiar.
Simon.
Simon P Lowe is offline   Reply With Quote
Old October 1st, 2007, 07:19 AM   #5
Regular Crew
 
Join Date: Nov 2005
Location: Milan/Italy
Posts: 63
Unfortunately a ProMist isn't effective, I think. I already mounted my M2 adapter and it doesn't solve the problem.
Thanks for answering
Alvise Tedesco 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 01:22 PM.


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