• AJA Video Systems

  23.98 to 29.97 proper pulldown question

  Posted by Richard Cooper on April 14, 2010 at 7:04 pm

  Hi all,
  In the Kona 3 control panel, I see that there is 3 options for the pulldown for the 24 to 30 fps conversion…
  Which pulldown do you recommend adding for monitoring an HD 1080/24p timeline on SD NTSC monitor and/or dubbing to Beta SP from my secondary output? 2:3:2:3? or 2;3:3:2?…

  Thanks

  Richard Cooper
  FrostLine Productions, LLC
  Anchorage, Alaska
  http://www.frostlineproductions.com

  Richard Cooper replied 16 years ago 3 Members · 5 Replies
• 5 Replies

• 

  Doug Beal

  April 14, 2010 at 9:27 pm

  You won’t necessarily be able to monitor HD on an SD monitor unless it’s a CRT Sony L series version2 (serial number starts with 200) and you’ll need to monitor component for that or if it’s HD compliant and supports 24P.
  As for the downconvert to BetaSP you’ll want 2:3:2:3 and that will need to be component unless you have a D75

  Doug Beal
  Editor / Engineer
  Rock Creative Images
  Nashville TN
• 

  Richard Cooper

  April 14, 2010 at 9:47 pm

  Thanks Doug…

  This answers my question…

  Another question… Is there a time that one would need the 2:3:3:2 pulldown rather than a 2:3:2:3? Is it there for different scenarios?

  Thanks

  Richard Cooper
  FrostLine Productions, LLC
  Anchorage, Alaska
  http://www.frostlineproductions.com
• 

  Doug Beal

  April 15, 2010 at 12:55 pm

  I have no Idea why someone would want to use that cadence. It’s the 24PA cadence
  perhaps to export to someone wanting that but why?? No idea

  Doug Beal
  Editor / Engineer
  Rock Creative Images
  Nashville TN
• 

  Jeremy Garchow

  April 15, 2010 at 6:53 pm

  [Doug Beal] “I have no Idea why someone would want to use that cadence. It’s the 24PA cadence
  perhaps to export to someone wanting that but why?? No idea “

  When removing the pulldown to get back to 24p, Advanced pulldown creates an ‘easier’ cadence removal as it’s just removing the one interlaced frame. In traditional 3:2 pulldown, there’s two interlaced frames, so you have to take a field from two different frames (BC, CD) to reconstruct the C frame.

  I should add, that being said, I am unsure of any device that would recognize the 24pA pulldown pattern, unless it was laid to dv/dv50 with the proper metadata via firewire.
• 

  Richard Cooper

  April 15, 2010 at 11:44 pm

  Thanks guys…

  Richard Cooper
  FrostLine Productions, LLC
  Anchorage, Alaska
  http://www.frostlineproductions.com

Reply to this Discussion! Login or Sign Up