🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Thread View: alt.sys.amiga.demos
3 messages
3 total messages Started by Alex Topic Sat, 23 Jan 1993 20:57
Re: PAL or NTSC?
#796
Author: Alex Topic
Date: Sat, 23 Jan 1993 20:57
44 lines
2277 bytes
 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?
#798
Author: Spice, Darrell G.
Date: Sun, 24 Jan 1993 19:14
35 lines
2066 bytes
<<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?
#802
Author: Martin Vilcans
Date: Mon, 25 Jan 1993 20:16
65 lines
3433 bytes
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
Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads