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From: ahg@mentor.cc.purdue.edu (Allen Braunsdorf)
Newsgroups: comp.sys.amiga
Subject: DCTV Questions?
Keywords: DCTV  RSN  Ask me
Message-ID: <2143@mentor.cc.purdue.edu>
Date: 2 Dec 90 18:24:25 GMT
Organization: Purdue UNIX Group
Lines: 43


I've got a DCTV box on order, and should receive it tomorrow (Mon Dec
3).  I plan to torture test it and post a summary of these tests to the
net (probably comp.sys.amiga and comp.graphics).

I've been calling Digital Creations on the phone and asking them
questions, so I've got a good idea of how the box works, and here's
what I've got on my list of things to determine so far:

1. Characteristics of digitized files

	Size of digitized DCTV encoded image
	Resolution of image once decoded (as 24 bit RGB)
	Distortion?
	Signature signal that tells DCTV to decode the RGB signal

2. Effects of encoding

	Encoder/Decoder programs' handling of aspect ratios
	Vertical resolution (size, actually) limitations
	Horizontal resolution limitations
	Banding effects in 24 bit images
	What types of filtration are used in the conversion processes?

3. Manner of encoding

	Signature
	Palette (it's fixed so you can animate easily- what is it and why?)
	Area of pixel mapping between encoded/decoded spaces
	Approximate gamma value of DCTV


If anyone's got any more questions about DCTV, mail them to me and I'll
try to find the answers.  If it's good, I'll let you know how good.  If
it bites, I'll let you know (and save you $500!).

I'll post my summary just as soon as I can.  The biggest likely delay
is that the box'll arrive late.  Whenever it does get here, I plan to
pull an all-nighter studying it...

---
Allen Braunsdorf			Purdue University Computing Center
ahg@cc.purdue.edu			UNIX Systems Programmer