Xref: utzoo sci.electronics:1826 rec.video:2646 comp.misc:1633
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From: milo@ndmath.UUCP (Greg Corson)
Newsgroups: sci.electronics,rec.video,comp.misc
Subject: Digitizing video (for computers)
Message-ID: <608@ndmath.UUCP>
Date: 7 Jan 88 23:37:52 GMT
Organization: Math. Dept., Univ. of Notre Dame
Lines: 32

Can anybody suggest how to construct a >>simple<< non-real time video
digitizer which could be attached to a parallel or fast (56k-1m bps)
serial port?  I've seen a gadget called DIGIVIEW for the Amiga which
simply connects to the parallel port...it takes awhile to digitize an
image (under a minute usually) but seems to be pretty stable as long 
as the input video signal doesn't waver.

I'm thinking the gadget must be pretty simple because the entire DIGIVIEW
hardware fits into a epoxy sealed module about 2x3x3/8 inches in size.

Resolution of the converter is 32 levels (5 bits) and it only handles
Black&white video.

Any hardware hackers out there have a good idea on how something like this
could be built (preferably as inexpensive as possible!).  I'd like to
put together something that could be attached to a Mac serial port and
feed in data at around 256kbps or so.  I can handle the software if someone
wants to take a whack at the hardware.

As simple as the digiview seems to be I suspect it wouldn't take much to
build one of these...possibly a video ADC and some matching components
would be all that was needed, but then...I don't profess to be a hardware
expert, particularly when it comes to video circuits....so you tell me!

Hope someone can help.

Greg Corson
19141 Summers Drive
South Bend, IN 46637
(219) 277-5306 (weekdays till 6 PM eastern)
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