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Old April 14th, 2005, 12:08 AM   #1
Join Date: Mar 2005
Location: Sacramento, CA
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Cineform at (SONY) NAB question


There's a line item on the Cineform website about NAB:
"SU6406 (Sony) Aspect HD: 24P workflow from CineFrame 25 source"

Any additional information on this? Sorry if the question's been asked and answered before, I don't recall any such thread.

Ron Nakano
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Old April 14th, 2005, 08:44 AM   #2
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As has been discussed in various threads, Sony's Cineframe-24 mode doesn't properly sample the frames during capture to allow perfect 24p reproduction after deinterlacing because the temporal distance between all frames is not identical.

In Cineframe-25 mode the temporal distance is identical except the material is running 4% too fast for our desired 24p workflows. A technique that has long been used is to slow down the frames by 4% to yield a 24p workflow, plus remodulating audio so it doesn't suffer pitch change (and remains in sync).

In our next release of Aspect HD we'll include proper CF25-to-24p conversion during capture to allow you to work in a 24p timeline. We'll be demonstrating this at NAB in the Sony booth.
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