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- Newsgroups: alt.sys.amiga.demos
- Path: sparky!uunet!mcsun!sunic!kth.se!lysator.liu.se!marvil
- From: marvil@lysator.liu.se (Martin Vilcans)
- Subject: Re: PAL or NTSC?
- Message-ID: <C1FEzL.J5G@lysator.liu.se>
- Sender: news@lysator.liu.se
- Organization: Lysator ACS at Linkoping University
- References: <Alex_Topic.05ru@tvbbs.wimsey.bc.ca>
- Date: Mon, 25 Jan 1993 20:16:30 GMT
- Lines: 65
-
- Alex_Topic@tvbbs.wimsey.bc.ca (Alex Topic) writes:
-
- > FF> Demo coders like to program in PAL for two reasons: 1) Most demo
- > FF> coders are
- > FF> in Europe and they're default display is PAL and 2) when using PAL
- > FF> screens,
- > FF> there's a hair more time between VBlanks, which can be significant
- > FF> when building
- > FF> the next frame to be shown.
-
- > Actually wouldn't you have more time in NTSC? Or could do abit more
- >than in PAL, since NTSC clockrate is slightly faster? Say you have a
- >200 scan line display, well after that you could trigger an interrupt
- >and would have tons of scan-line time. I know european demo coders
- >use PAL no matter what, and I respect the use of PAL. However I know
- >for sure I may make some stuff in NTSC in the future. hmm..
-
- No, in NTSC, you'll get 16% (if I calculated it correctly) less time to
- create your display, as NTSC runs in 60 Hz compared to PAL's 50 Hz. On top
- of that, PAL has a higher resolution. I don't know if the processor runs
- faster on a NTSC machine (for timing purposes), but the difference is so
- small compared to the difference between 20 ms/frame and 17 ms/frame.
- So there is no reason to use NTSC for demos.
-
- > FF> North American's don't like PAL for two reasons: 1) It's not what
- > FF> there
- > FF> default screen is (so they typically lose the bottom part), and 2)
- > FF> power
- > FF> in the US is sent on a 60Hz frequency, and they're televisions also
- > FF> have
- > FF> a 60Hz refresh rate. The TV is significant in that the 60Hz refresh
- > FF> rate is what they're use to, and the electrical power causes the
- > FF> lights
- > FF> to "beat" at 60Hz. The fact that NA's are used to 60Hz refresh and
- > FF> the lights
- > FF> beating out of sync with the monitor causes a very subtle flicker on
- > FF> PAL
- > FF> screens that bothers some people.
-
- Sure that the flickering isn't simply because the refresh rate is lower in
- PAL? Americans are perhaps bothered by it because they are used to the
- higher frequency of NTSC.
-
- > Well I have been using PAL for 2 years now, and I'm totally use
- >to it. I never see a flicker now, and its alot nicer to look at stuff
- >in pal. Less grainy..heh My 1084s monitor handles PAL quite well. I think
- >most people on the Amiga who look at demos, have the PAL ability. If not
- >its their problem... anyone serious about computing uses an monitor..heh
- >not a tv!
-
- I still use an old TV set. I'm not as rich as all americans seem to be.
- Rich capitalist pigs! :-)
-
- > No matter what both PAL and NTSC have their pro's and con's. I just
- >wish HDTV would come out soon, so we wouldn't have different standards
- >on each side of the world..heh C'ya later!
-
- Actually, there seems to become three different standards for HDTV
- (for America, Europe and Japan I think). They never learn, it seems...
- Right now, bigger TV projects are recorded on film (16 or 35 mm, I'd
- guess), to be able to show on HDTV's. (At least, Swedish television
- does.)
- --
-
- Martin Vilcans marvil@lysator.liu.se
-