Re: [stella] A new colour display technology

Subject: Re: [stella] A new colour display technology
From: "Andrew Davie" <atari2600@xxxxxxxxxxxxx>
Date: Tue, 24 Aug 2004 00:06:41 +1000
Proof is in the pudding.  This looks like crap on Z26 on my system (even
with the -! flag), but on the real thing... well it looks OK to me.  I think
it actually works.  I have a very noisy connection, but all the colours do
seem to be there and there's definitely no 'Interleaved Chronocolor(TM)'
shimmer anymore.  And I'm only displaying 2 of the 3 ICC frames.  It looks
very much like it's a true interlaced display.  Original image included for
comparison.  I'd be interested to see what others think.
Also included, an ICC version of the same image.

Attachments: contains...
ICC_PAL.bin -- an Interleaved CHronocolor(TM) version in PAL
ICC_NTSC.bin -- ditto in NTSC contains...
SpastiColour01_PAL.bin -- an Interlaced SpastiColour(TM) version in PAL
SpastiColour01_NTSC.bin -- ditto in NTSC

The test is:  what looks better on an ACTUAL TV;  the ICC version or the
SpastiColour version?   Jury is out for me, as my actual tv experience must
first go through a video recorder, recorded onto tape, then marched down to
my real TV for testing.  I get so much noise it's hard to see what's what.

Caveats:  I used source graphic frames from the ICC process.  A utility
could probably better create two RGB frames more suited to the actual
technology.  I figured what I had should work, though.  Opinions on the
results, please!


----- Original Message ----- 
From: "Thomas Jentzsch" <tjentzsch@xxxxxx>
To: <stella@xxxxxxxxxxxxxxxxxx>
Sent: Monday, August 23, 2004 8:41 PM
Subject: Re: [stella] A new colour display technology

Andrew wrote:
> I thought I'd post this idea to the list, in case someone wants to have a
> at implementing it.  I don't have the time right now, but I do know it
> work.  This is a new technique for displaying colour graphics.

Cool idea! I really like your creativity! Actually I had tried using
the interlace mode here myself too, but my approach was different
and the results looked pretty ugly. I suppose your technology
will work better.

> But the overall effect of this two frame technique with interlacing is;
> * no flicker (other than interlacing, which we're all used to)

I am not absolutely sure here. IIRC my experiments with interlace on
the Atari 2600 looked quite flickering. But maybe I am wrong here.

> * improved perceived resolution (we're doubling vertical resolution with
> interlacing anyway)

Yes, but IMO you are also reducing the effective vertical resolution by
combining 3 lines.

> * a much nicer image overall.

Maybe. :-)

Have fun!
Thomas Jentzsch | *** Every bit is sacred ! ***
tjentzsch at web dot de |
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