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From: mcdonald@uxe.cso.uiuc.edu
Newsgroups: comp.graphics
Subject: Re: Workstations that can record/play r
Message-ID: <46900048@uxe.cso.uiuc.edu>
Date: 16 Nov 89 10:27:58 GMT
References: <1593@ndmath.UUCP>
Lines: 23
Nf-ID: #R:ndmath.UUCP:1593:uxe.cso.uiuc.edu:46900048:000:739
Nf-From: uxe.cso.uiuc.edu!mcdonald    Nov 15 14:09:00 1989


>Well, not quite.  A standard NTSC image does not contain the digital
>equivalent of 24 bits per pixel.  
Very true.

>The color coding scheme of NTSC provides
>high spatial frequency image data only to the luminance component of the 
>picture.  The color information is "smeared" atop this grayscale data
>at a much lower spatial frequency.  
Also true.

>The eye appears to notice little of
>this psychophysical magic due to,
<explanation was wrong>

This is true in principle. But the NTSC system still has much too little
color bandwidth. Color of half to two-thirds the luminance would
be acceptable. 

And most of the world won't be looking at NTSC quality, or a little
better, for much longer. Japan certainly won't.

Doug McDonald