Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!rutgers!sun-barr!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!cunixf.cc.columbia.edu!cunixb.cc.columbia.edu!es1
From: es1@cunixb.cc.columbia.edu (Ethan Solomita)
Newsgroups: comp.sys.amiga
Subject: Re: 24 bit color boards
Message-ID: <1990Dec4.155412.23755@cunixf.cc.columbia.edu>
Date: 4 Dec 90 15:54:12 GMT
References: <1990Dec4.013744.10286@ncsuvx.ncsu.edu> <1990Dec4.061416.16472@uokmax.ecn.uoknor.edu> <1990Dec4.115219.15680@zorch.SF-Bay.ORG>
Sender: news@cunixf.cc.columbia.edu (The Daily News)
Organization: Columbia University
Lines: 27

In article <1990Dec4.115219.15680@zorch.SF-Bay.ORG> xanthian@zorch.SF-Bay.ORG (Kent Paul Dolan) writes:
>Except that I made exactly the opposite point:  just because you can output
>8 each red, green, and blue bits to the D to A gun intensity controls doesn't
>mean you have the right to call your system "24 bit color", since that is a
>term of art that means that you _store_, not _emit_, three bytes of color data
>per pixel.

	Kent, take out a calculator and do a little math. The
resolution of DCTV is somewhere around 600x300, or 180,000
pixels. Therefore, if you get 18 bits worth of distinct colors
out of a 24 bit palette, you essentially have a 24 bit
frame-buffer within the given resolution limit. ie there are only
enough pixels to display 18 bits worth of color. I believe that
someone said that DCTV was the equivalent of 22 bit planes, which
exceeds that.
	Of course, that doesn't justify them calling it true 24
bit, but if we are discussing usability and quality of the
product (as opposed to the advertising), it is an excellent
product. As to the quality of the ouutput signal, however, I have
no idea.

	-- Ethan

	Woody Allen on Los Angeles:

	"I mean, who would want to live in a place where the only
cultural advantage is that you can turn right on a red light?"