Xref: utzoo comp.graphics:6848 rec.video:7504
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!tut.cis.ohio-state.edu!ucbvax!ulysses!ggs
From: ggs@ulysses.homer.nj.att.com (Griff Smith)
Newsgroups: comp.graphics,rec.video
Subject: Re: HDTV and ATV Glossary (TN32)
Summary: 24 Hz is too slow
Keywords: 525/59.94, 625/50, NTSC, PAL, SECAM, Component, Composite,
Message-ID: <12027@ulysses.homer.nj.att.com>
Date: 13 Aug 89 21:57:57 GMT
References: <120919@sun.Eng.Sun.COM> <121076@sun.Eng.Sun.COM>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 36

In article <121076@sun.Eng.Sun.COM>, poynton@vector.Sun.COM (Charles A. Poynton) writes:
> A few people in Hollywood proposed 30 Hz film, and SMPTE had a study group
> on it, but there was never any popular support behind the idea.  Among
> other things,
> 
> - 24 Hz is quite sufficient for motion rendition,
...
> All in all, just no good reason to do it.

For years, I had wondered why motion looked `real' on television, and
artificial on film.  Then I began to see some film that had been done
at 30 Hz, and realized that the faster frame rate made the motion much
more realistic.  Furthermore, to me there is an additional dramatic
improvement in going from 30 Hz to 60 HZ.  50Hz television won't do, it
flickers too much.

> > ... why burden TV with a slower rate.
> 
> Ah, wait a minute here, we want to burden TVs with a slower rate because
> we can't afford the bandwidth to raise it!

I assume this is part of the attempt to get rid of interlace so the
computer graphics folks can avoid motion artifacts.  I already have to
put up with motion artifacts while watching film on television, why do
I have to lose realistic motion on recorded television just so computer
graphics can look better?  What is so evil about interlace?

> -----
> Charles A. Poynton			Sun Microsystems Inc.
> 			2550 Garcia Avenue, MS 8-04
> 415-336-7846				Mountain View, CA 94043
-- 
Griff Smith	AT&T (Bell Laboratories), Murray Hill
Phone:		1-201-582-7736
UUCP:		{most AT&T sites}!ulysses!ggs
Internet:	ggs@ulysses.att.com