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- Newsgroups: comp.multimedia
- Path: sparky!uunet!spool.mu.edu!agate!usenet.ins.cwru.edu!gatech!taco!garfield.catt.ncsu.edu!kdarling
- From: kdarling@garfield.catt.ncsu.edu (Kevin Darling)
- Subject: Re: Buying a multimedia system
- Message-ID: <kdarling.716259240@garfield.catt.ncsu.edu>
- Lines: 36
- Sender: news@ncsu.edu (USENET News System)
- Organization: North Carolina State University
- References: <1992Sep4.234254.11508@newshub.ariel.yorku.ca> <1992Sep4.151113.3583@mnemosyne.cs.du.edu> <1992Sep4.182640.16397@murdoch.acc.Virginia.EDU> <1992Sep8.171910.29493@murdoch.acc.Virginia.EDU>
- Date: Sat, 12 Sep 1992 00:54:00 GMT
-
- dudley@cebaf4.cebaf.gov (John Dudley) writes:
- > The Amiga on the other hand, has proprietary custom chips [...]
- > The Agnus [chip] controls ALL Amiga animation.
-
- This is a too popular misconception. Compressed animation file playback
- on the Amiga is done by the 680x0, of course, since only a cpu has the
- capability of running data decompress/placement code.
-
- The main reason why animations look good on the Amiga is because they
- are double-buffered, which hides the limited cpu->display access bandwidth
- and planar-layout update artifacts of the current chipset. For similar
- reasons, double-buffering is usually a desirable trait for any system.
-
- > Lastly, I do warn you that on September 11th-13th there is a World
- > of Commodore show in Pasadena California. There, Commodore is expected
-
- This is good advice (wait until this weekend, then check the Amiga groups).
-
- Also, robertk@taoami.lerctr.org (Robert Kesterson) writes:
- > [...] I can say that given a fast enough hard drive, you should be able
- > to do full-screen DCTV animations even if *every* pixel changes between
- > frames. (The DCTV was demoed at one trade show by running several minutes
- > of digitized video from the the movie "Back to the Future".
-
- Such demos are meaningless, especially since the normal AmigaDOS file system
- was bypassed for that one. I wish I had a dime for every person who was
- told about that demo but who later found that realtime true fullscreen/motion
- (especially in the highest DCTV color res) is impossible with stock setups.
-
- Nevertheless, an Amiga/DCTV combo is inexpensive and there are ways around
- any limitations. What a lot of people do is use a single-frame-record VCR
- and output their large-delta DCTV frames one at a time... this method is
- often used/required on other systems as well. An alternative I've heard of
- is to use a good genlock and overlay smaller-delta frames in multiple passes.
-
- kevin <kdarling@catt.ncsu.edu> <76703.4227@compuserve.com>
-