Re: An LCD for your IIGS?

[mjmahon@aol.com (Michael J. Mahon)]

Paul Schlyter replied:

>In article <20030921235449.16646.00001375@mb-m02.aol.com>,
>Michael J. Mahon <mjmahon@aol.com> wrote:
> 
>> S-Video is quite different, since it has only two signals:  the Y
>> signal (of potentially high bandwidth) and the quadrature
>> modulated chrominance subcarrier, which is necessarily
>> limited to less bandwidth than the subcarrier frequency
>> (3.58MHz).  S-Video is better than composite (since the
>> luminance signal will not be bandwidth-limited by separating
>> out the chrominance subcarrier), but substantially inferior
>> to RGB or component video (which have no intrinsic chroma
>> bandwidth limitations).
> 
>OTOH you probably won't notice the difference, since the eye itself
>has a worse chroma resolution than luminance resolution.  If you do
>notice any difference, then you're sitting too close to the screen,
>and you'll probably notice luminance bandwidth limitations as well.

RGB displays are noted for their ability to render pixel-level
differences in color and luminance.  Smearing out the color
changes over several pixels may be subjectively acceptable
for video and photographic images, but it is not at all good
for screens containing fonts and other fine color detail.

Any color-on-color detail which has little luminance contrast
will be blurred significantly--comparable to a composite
video display.

Computer displays are usually viewed at a distance from
the screen that renders indidual pixels visible, unlike video
displays.

I point this out, because people are looking for a more
abundant alternative to the IIgs RGB display.  It is important
to understand the limitations of mapping RGB to more
bandwidth-limited formats.

-michael

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