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From: marquet@bohra.cpg.oz (John Marquet)
Newsgroups: comp.ivideodisc
Subject: Re: DVI, JPEG, and all that stuff
Summary: DVI versus JPEG, videodisc versus CD, etc.
Message-ID: <1990Nov30.061727.14221@bohra.cpg.oz>
Date: 30 Nov 90 06:17:27 GMT
References: <3977@mindlink.UUCP>
Organization: CP Software Export P/L, Computer Power Group
Lines: 36

Rick McCormack writes:
> As an aside, a study in 1988 by Business Communications Co., indicated that by
> 1993, the market would be split as follows:
> videodisc players: 17.1% (such accuracy)
> 
> CD-ROM: 40.1%
> 
> CD-Video (CD-I and DVI): 33.5%
> This is for industry growth figures in business use.  Any ideas if these
> figures have changed in two years?
> 
I wouldn't want to bet.  There's several strikes against the CD-I and DVI
scenario:

DVI is no good for large collections of stills.  The compression algorithm
relies on there being considerable commonality between successive images,
which is true of movies, but not of stills.

Analogue video is a consumer durable on tape, and is becoming so in disc.
When we started out in the video disc publishing area, it took maybe three
weeks to get a disc pressed.  Now it's overnight.

DVI loses resolution.  VGA loses colour range.  Regular video doesn't.  It's
easier to overlay computer generated stuff on video monitors than it is to 
overlay video stuff on computer screens.

We sell video discs worldwide.  That in itself is a challenge, because of the
variety of players around, but it can be done.  It's only in the U.S. that 
feature junkies demand the products on CDs, and mostly their enquiries are
not well-informed.

For many video applications, it makes no sense to go the trouble of digitising
the frames, particularly in instances where the pictures are from the `real
world', rather than computer-generated or man-made.


D


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