Thread View: alt.sys.amiga.demos
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3 total messages
Started by Alex Topic
Sat, 23 Jan 1993 20:57
Re: PAL or NTSC?
Author: Alex Topic
Date: Sat, 23 Jan 1993 20:57
Date: Sat, 23 Jan 1993 20:57
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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..
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.
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!
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!
-Alex
-- Via DLG Pro v0.995
Re: PAL or NTSC?
Author: Spice, Darrell G.
Date: Sun, 24 Jan 1993 19:14
Date: Sun, 24 Jan 1993 19:14
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<<CLIPPED>> > 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 put the mono-chrom composit out to my TV set, and it was able to handle the PAL scanning rates! Just had to adjust the size of the picture with the knobs behind the set. I also use PAL all the time on my 1084s. It just adds so much more room to the screen without having the interlaced flicker. It possible to see the flicker, but only if I go out of my way to see it. > 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 HDTV may NOT be the same standard on both sides of the pond. My understanding (I subscribe to a video magazine) is that Europe is designing their OWN standard (analog at that) because they don't want to be dependent upon Japan's technology for their TV's. This will help build up some industry in Europe at the cost of being incombatible with the rest of the world. Of course, since the USA has yet to go to metric(was originally planned to happen back when I was in grade school in the 70's) I'm not sure if it is a major thing. > -Alex > >-- Via DLG Pro v0.995 > Darrell Spice Jr. ST1GS@Rosie.Uh.Edu
Re: PAL or NTSC?
Author: Martin Vilcans
Date: Mon, 25 Jan 1993 20:16
Date: Mon, 25 Jan 1993 20:16
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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
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