[Coco] Video adapters

[jdaggett at gate.net]

S Video essentually corrects an issue known as dot crawl or where 
the luminance information bleeds into the chromanace info. 
Therefore by the separation of luminance and chromanance signals, 
Luminance information has a higher bandwidth. Chromanance still 
remains the same bandwidth. That means color info encoded per 
NTSC standards will still suffer that same issues as composite 
color. 

This means that NTSC does not have sufficient bandwidth for 80 
column color video. SO S Video will also suffer the same fate. Also 
Dark Blue on black has a horrible contrast ratio. 

james



On 27 Apr 2006 at 21:49, Chris Hawks wrote:

> ---Reply to mail from Chester A Patterson about [Coco] Video adapters
> 
> > Hi,
> > 
> > I cannot speak for anyone else, however I certainly would be MOST interested
> > in an arrangement that has BOTH adapters functioning at the same time.
> > 
> > I believe I'm on Roy's waiting list, but I'm in no hurry. I will also order
> > Chris' S-vid adapter if the fix can be implemented. Many thanks!
> 
> Chester:
> 
>     No fix is needed. The blue is a little weak, but it's only noticable
> if you try to do blue text on a black background. A video engineer told me
> that it was an S-Video thing. It was never intended to do 80 column text.
> All the other color combos look great! See John Kowalski's picture at:
> http://www.axess.com/twilight/sock/graphics/svideo2.jpg
> The AD724 picture looks just like my adapter does. It looks even better in
> real life.
> 
>     I'll be demo-ing it on a 42" plasma at the 'fest.
> 
> BTW: Were you at HowardMedical when I was involved with them?? I deisigned
> the Slot-Pak. Chicke(sp) was thre then.
> 
> ---End reply
> 
> Christopher R. Hawks
> HAWKSoft
> -------------------------------------------------------------------------
> Windows is the answer, but only if the question was 'what is the 
> intellectual equivalent of being a galley slave?' 
>     -- Larry Smith, in comp.os.linux.misc
> 
> 
> 
> 
> 
> 
> -- 
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
> 
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.385 / Virus Database: 268.5.1/327 - Release Date: 4/28/2006
>