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From: wes@uh.msc.umn.edu (Wes Barris)
Newsgroups: comp.graphics
Subject: Re: Animation on Silicon Graphics Personal Iris
Message-ID: <2422@uc.msc.umn.edu>
Date: 22 Aug 90 14:02:16 GMT
References: <4392@tahoe.unr.edu>
Sender: news@uc.msc.umn.edu
Reply-To: wes@msc.edu
Organization: Minnesota Supercomputer Center
Lines: 27

In article <4392@tahoe.unr.edu> you write:
> 2. I am trying to decide on a method to store animations.
> The first question is: digital or analog (i.e., storing
> the RGB or NTSC signal). One method that I am thinking
> about is to store frame by frame on a Sony LVR-5000 laser
> videodisc recorder (WORM technology). Anybody have any
> opinions or further ideas?
>
My background includes using the Wavefront software to produce commercial
animations.  There is quite a bit of difference between storing RGB files
vs. NTSC (RS-170a) on tape (or disc).  RGB files may be compressed or stored
using the Utah Raster Toolkit which uses run-length encoding to compress the
data.   If you don't mind buying tapes this method would preserve your
data completely.  NTSC is as bad as it gets.  BetacamSP is probably the
most widely accepted (best) way to store an analog component signal.  8MM or
HI 8MM isn't too bad.  It is still component but it smushes the signal down to
Y/C (luminance and chroma).  It doesn't have the ability to store time code
if that is important.  I believe laser discs are store composite and they
can only be written once.

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