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From: eric@mcrware.UUCP (Eric Miller)
Newsgroups: comp.ivideodisc,comp.multimedia
Subject: Re: DVI questions
Message-ID: <4926@mcrware.UUCP>
Date: 5 Feb 91 15:22:13 GMT
References: <573@hydra.bucknell.edu> <1991Jan15.040230.26507@gpu.utcs.utoronto.ca> <4687@mcrware.UUCP> <809@anaxagoras.ils.nwu.edu>
Reply-To: eric@mcrware.UUCP (Eric Miller)
Distribution: usa
Organization: Microware Systems Corp., Des Moines, Iowa
Lines: 31

In article <809@anaxagoras.ils.nwu.edu> korcuska@plato (Michael Korcuska) writes:
>
>It seems that by
>the time CD-I has full motion video we might see DVI supporting MPEG.

DVI and CD-I may well end up both supporting MPEG (I hope so!).  As I have said
before, DVI and CD-I will probably co-exist peacefully for many years.  The
main difference is how you as a publisher perceive your audience.  If you are
publishing "consumer" titles you should publish in a format that will be
supported by 10's of millions of consumer machines.

If you are publishing "computer user" titles, then you should publish on a
medium that is accessible to a MAC or an IBM/PC.  With any luck, the standards
for Full Motion Video will be universal enough so that publishers of
"cross-over" titles don't have to worry about re-mastering all of their data.
(Encyclopedias, reference books, some games...)

>650 megs just doesn't provide the 
>space for a huge amount of video and the 150KB/sec data transfer rate for 
>CDs doesn't leave much room for improving video quality.

You can fit 72 minutes of high-quality FMV on a CD-I or DV-I disc.  That seems
comparable to one side of a laser disc.  What with multi-disc players becoming
more popular, I can't see this as a realistic limitation.  We are limited
currently to 170 KB/sec of video data, but I will never underestimate the power
of science to pack incredible amounts of data into CDs and to decode it in
real time.

Eric Miller
Manager, New Media Systems
Microware Systems Corp