Pal and NTSC

From: Richard Erlacher <richard_at_idcomm.com>
Date: Wed Nov 8 19:07:48 2000

If I remember correctly, the format difference between PAL and NTSC lies not
only in the difference in the vertical refresh rate but also in that the
NTSC format is based on 525 horizontal scans per frame, while PAL uses 625.
I'm not at all sure about whether PAL interlaces in the same way as NTSC
does it, and, in fact, I'm not sure that they do that at all.

Scan rate conversion is not at all a trivial process, to wit, boxes that did
that between the desired NTSC format and the somewhat unusual high-frequency
format used by the SGI stations on which high-res graphics were processed
when I was involved in that sort of thing, cost several tens of thousands of
taxpayer dollars.

If you can find convertor of some suitable form, perhaps one of the popular
video processor boxes that goes with the MAC or AMIGA for audio/video
processing, that's your best bet.

Dick

----- Original Message -----
From: Lawrence Walker <lgwalker_at_look.ca>
To: <classiccmp_at_classiccmp.org>
Sent: Wednesday, November 08, 2000 5:09 PM
Subject: Pal and NTSC


> I have an old famicon game system that is PAL-compliant.
> Other than a PAL/NTSC converter or PAL TV is there any way of
> hooking this up. ?
> I do have a kaleidoscopic collection of monitors as well as
> several VCR tape decks and a JDH Videomate external VGA/TV
> adapter which allows me to use my NEC multisync as an all-
> purpose viewer. It has an H-Phase pot whose response on the
> monitor is a shift to the side of the display and otherwise not
> causing any picture distortion. I recall on my Atari there were
> programs that shifted from 60mhz to 50mhz and allowed you to
> play PAL formatted games, but in this case there is no computer
> intervention with the JDH. It is a straight-thru switch.
> I don't consider this OT since the PAL/NTSC is a problem for all
> collectors who are internationally-connected in this media.
>
> ciao larry
>
> Reply to:
> lgwalker_at_look.ca
>
>
Received on Wed Nov 08 2000 - 19:07:48 GMT