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From: greg@tcnz2.tcnz.co.nz (Greg Calkin)
Newsgroups: comp.ivideodisc
Subject: Re: How much can be put on a videodisc
Message-ID: <489@tcnz2.tcnz.co.nz>
Date: 3 Dec 90 00:13:46 GMT
References: <3977@mindlink.UUCP>
Reply-To: greg@tcnz.co.nz (Greg Calkin)
Organization: Thomas Cook NZ Head Office, Auckland, NZ
Lines: 20

In article <3977@mindlink.UUCP> a544@mindlink.UUCP (Rick McCormack) writes:
>DVI (Digital Video Interactive) offers full-motion interactive video using
>highly compressed images, and may de-rail CD-I development.  Using SCSI at 12.5
>megabytes per second, using the standard CD-ROM form factor (Hey! That means
>its the same size!  Why didn't you say that?  Cause no-one else says that.
>OH!) with 650 Megabytes of storage, you can expect 72 minutes of full-motion
>video.
650M / 12.5 MBs = 52 sec
650M / 1.25 MBs = 520 sec
       ^^^^^^^^ normal scsi
72 min * 60 sec * 1.25MBs = 5400 Meg
72 min * 60 sec * 12.5MBs = 54000 Meg

650Meg / (72 * 60) ~= 150Kps

Where do you get 72 minutes of full video from ?
-- 
Greg Calkin, Systems Engineer and Dreamer                    (greg@tcnz.co.nz)
Thomas Cook N.Z. Limited, PO Box 24, Auckland CPO, New Zealand, Ph (09)-793920
Disclaimer : Would you buy a used car from someone with these opinions ?


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