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- Newsgroups: comp.sys.amiga.hardware
- Path: sparky!uunet!wupost!sdd.hp.com!col.hp.com!fc.hp.com!koren
- From: koren@fc.hp.com (Steve Koren)
- Subject: Re: A1200/4000 ramblings...
- Sender: news@fc.hp.com (news daemon)
- Message-ID: <C09L8v.Fru@fc.hp.com>
- Date: Sun, 3 Jan 1993 06:12:31 GMT
- References: <3R30VB2w164w@cellar.org>
- Organization: Hewlett-Packard Fort Collins Site
- X-Newsreader: Tin 1.1.3 PL5
- Lines: 21
-
- Steve Winokur (swinokur@cellar.org) wrote:
-
- > Close... but no cigar.
-
- No, it is perfectly correct. Movies have 24 distinct frame changes per
- second, which is plenty enough to be perceived as smooth movement by
- almost everyone. However, the entire image is projected "at once", not
- scanned with an electron beam as in a CRT. This is what I was trying to
- get across, in response to the orginal poster's comment that 24 FPS must
- be a high enough _scan_ rate because it is high enough to be perceived
- as smooth movement in movies.
-
- Your point about doubling each frame and projecting at 48 FPS is
- something else entirely and this used because there is, in reality, some
- time between frames. If you could envision a perfect projection system
- which could put up one frame and then another immediately with no
- interval between them, 24 FPS would be perceived as both flicker free
- (because there is no scanning of the images or time between images) and
- smooth (because 24 images per second is enough to look that way).
-
- - steve
-