[opendtv] Re: Frames Per Second of 720P

  • From: Craig Birkmaier <craig@xxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Thu, 24 Jul 2008 09:53:08 -0400

At 3:59 PM +0100 7/23/08, Martin Holmes wrote:
In the (NTSC) television industry we don't use 30 or 24 either.  It's 29
and 23 (ignoring all the extra .94's and .97 and .976's).  In HD it
would be expressed (clearly, and without any doubt as to picture count
expectations) as;

720 @ 59 p
1080 @ 29 i
1080 @ 23 pSf
486 @ 29 i

720 @ 50 p
1080 @ 25 i
1080 @ 25 pSf
576 @ 25 i

Good post Martin, but I would not include Segmented Frame in the hierarchy. This is just a dumb trick to record real film frames on a recording device that was invented for capturing interlaced fields. SF does not exist inside a modern post production system which operates on frame based video; it is much easier to store the film frames, either compressed or uncompressed...on a hard drive.


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