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From: wwarner@en.ecn.purdue.edu (Art Warner)
Newsgroups: comp.sys.amiga.multimedia
Subject: Re: CDTV Motion Video
Message-ID: <1991Jun10.221045.28162@en.ecn.purdue.edu>
Date: 10 Jun 91 22:10:45 GMT
References: <30764@hydra.gatech.EDU> <19750006@hpmwmat.HP.COM> <31024@hydra.gatech.EDU>
Organization: Purdue University Engineering Computer Network
Lines: 33

In article <31024@hydra.gatech.EDU> jt34@prism.gatech.EDU (THOMPSON,JOHN C) writes:
>To me full motion video means 30 fps true life color. I've been wondering if
>anyone has ever documented the need for this capability in multimedia. Sure it
>looks great on the screen but does it enhance learning, retention, or provide
>some other significant benefit. What if it would cost a whole lot less to do
>only 256 colors at 15 fps, would this change the impact of the message. Do we
>need motion video at all? Still photos can display a lot of information at a
>significantly lower cost. Sometimes we seem to push technology for the sake of
>technology without really understanding if it brings anything new to the table.

Why don't you come over to my house and watch the NBA playoffs on a 12" b&w
tv while I feed you "framegrabbed" stills of the game every 30 seconds, while
I watch Jordon "stuff the basket" on my 25" COLOR TV at 30 frames/second 
TV/monitor?

Does that answer you question?

>they were replaying full screen b&w video from a floppy. Amazing!
With DCTV, which C= says goes nicely into a CDTV, one can playback REALTIME
anim files in NTSC quality.  Full overscan!  Try that Mac!
I found single frames to be about 30-35k each.  Not bad for 24bit color data!
All of this is WITHOUT any compression other than the DCTV format itself.

Some of you may remember my POSTS from a while back asking if anyone thought
that it would be neat to add DCTV to a CDTV.  Well......CBM must have already 
been thinking of this because my connections tell me that they have been seeing
CBM using DCTV's in their CDTVs's video slot.  (remember there is a video slot
in the DCTV!)  Apparently the CDrom transfer rate is good enough to transfer 
DCTV format pictures realtime!
-- 
William "Art" Warner                 //\
CBM Amiga Student Rep.             \X/--\miga makes it happen..........
wwarner@en.ecn.purdue.edu          IBM, Apple, Sun, & Next make it expensive!