Seconded!

when we work at 24 uncompressed HD for film out, and the workflow has
the IP transfered back to NTSC, then we call it "TRUE 24" as almost
everyone sees a 24p label as indicating 23.98, that seems to be the
emerging "standard" and the circle of confusion grows wider......... a
"TRUE 24" label will at least make a tape dog stop and (if thought is
possiable) think a tiny little bit before screwing up the sync

Experience is what you get right after you needed it....

Ta,

d.


On Apr 23, 2004, at 7:51 AM, Lucas Wilson wrote:

> Sorry to be contrary, but it usually doesn't mean 24fps.
>  
> In the post-production community, when people say "24p," they are
> usually referring to 23.98p -- which is what you get when you remove
> pulldown from an NTSC signal at 29.97 frames per second.
>  
> There is very little production or post-production that is done at
> true 24p. Almost everything is at 23.98p. It may sound like a small
> distinction, but it carries huge implications for sync sound and audio
> post.
>  
> And be careful, because there is true "p" and there is "PsF." Both are
> pictures that are captured at one temporal instance. But 24p is played
> back progressively, like a computer monitor, where the scan order is
> 1, 2, 3, etc. But 24PsF is a still image that is played back via an
> interlace -- like NTSC. So instead of the still image being shown
> progressively, it is shown in two fields. This was done so that the
> major manufacturers could still use existing CRT technology and
> existing television sets to display material that is captured at a
> 23.98fps temporal resolution. Add pulldown to 23.98 and you get
> 29.97fps.... NTSC.
>  
> Lucas Wilson
> --------------------
> HD Online Editor
> Los Angeles
> -----Original Message-----
> From: Arthur Raham [mailto:araham@...]
> Sent: Thursday, April 22, 2004 4:39 PM
> To: hdtvproduction@yahoogroups.com
> Subject: RE: [HDTV Production] 24p HD
>
> yes.  it means 24 fps.  The "p" stands for "progessive" rather than
> "interlace".  Most video has always been catured in odd and even
> feilds, but a progessive scan means the whole image was captured at
> once with no scan lines.
>  
> hope that helps
> -----Original Message-----
> From: sati [mailto:saftz@...]
> Sent: Thursday, April 22, 2004 8:39 AM
> To: hdtvproduction@yahoogroups.com
> Subject: [HDTV Production] 24p HD
>
> When one says 24p HD, what actually that means. Is it 24 fps or
> something more? Sorry for asking this simple Q but i need to know.
> Thanks
> sat
>
>
>
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