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Article #274

Re: DVI questions

#274
From: Charlie S. Lindahl
Date: Wed, 16 Jan 1991 08:33
32 lines
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In article <425@newmedia.UUCP> jim@newmedia.UUCP (Jim Beveridge) writes:

   The first chip to do JPEG is from C-Cube, and they are currently only
   shipping the still frame version of the chip.  The real time version
   is still not available.  Even in compressed form, the bandwidth
   required for a full JPEG screen far exceeds the abilities of an
   IBM bus to transfer.  (I don't believe it to be a problem for the
   Apple NuBus)  JPEG still requires LOTS of data moving around.
   To keep track of it, you pretty much require the full resources
   of the system to move it off the hard disk and pump it into the
   chip fast enough.

I understand that the high-end color NeXT is using JPEG compression on
their DIMENSION board (using the C-Cube chip). I assume that the bus width 
on the NeXT (being NuBus, and faster than Mac's NuBus) should be able
to handle the compressed video (citing from the previously-submitted
article). 

Does anyone know the details of the Dimension board to be able to tell us 
that's wants to know? Has anyone actually SEEN real-time compressed
video on a DIMENSION-equipped NeXT? 




--
Charlie S. Lindahl
Automation and Robotics Research Institute
University of Texas at Arlington
Internet EMAIL: lindahl@evax.arl.utexas.edu

Standard disclaimer: Ain't no opinion but my own.
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References: <573@hydra.bucknell.edu> <1991Jan15.040230.26507@gpu.utcs.utoronto.ca> <425@newmedia.UUCP>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!evax!evax!lindahl
From: lindahl@arrisun3.utarl.edu (Charlie S. Lindahl)
Newsgroups: comp.ivideodisc
Subject: Re: DVI questions
Message-ID: <LINDAHL.91Jan16023317@arrisun3.utarl.edu>
Date: 16 Jan 91 08:33:17 GMT
References: <573@hydra.bucknell.edu>
 <1991Jan15.040230.26507@gpu.utcs.utoronto.ca> <425@newmedia.UUCP>
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In-Reply-To: jim@newmedia.UUCP's message of 15 Jan 91 15:09:30 GMT