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- Path: sparky!uunet!cs.utexas.edu!sun-barr!ames!network.ucsd.edu!alex.ucsd.edu!spl
- From: spl@alex.ucsd.edu (Steve Lamont)
- Newsgroups: comp.graphics.visualization
- Subject: Re: Recording animations
- Date: 11 Nov 1992 14:26:30 GMT
- Organization: University of Calif., San Diego/Microscopy and Imaging Resource
- Lines: 30
- Message-ID: <1dr56mINNp5o@network.ucsd.edu>
- References: <jamison@EDU.COLOSTATE.ACNS.YUMA> <9211110425.AA25602@psi.rutgers.edu>
- NNTP-Posting-Host: alex.ucsd.edu
-
- In article <9211110425.AA25602@psi.rutgers.edu> CDO@IB.RL.AC.UK (C D Osland) writes:
- >The Abekas A60 is a video disk recorder; default storage is 750 frames
- >(30 seconds) in PAL and <<I think>> 25 seconds in NTSC ... yes, I know
- >that also makes 750 frames, but the frames are different sizes in
- >kilobytes in the two systems. Unlike the (optical) recorders
- >mentioned below, quality is 'perfect' - unless you want 10 bit per
- >pixel or HDTV spatial resolution.
-
- I'm not sure what the word 'perfect' means here. Certainly, the image
- quality is better than just about anything else but 'perfect?' A
- point to note is that if you write a frame to the A60 in RGB mode and
- read it right back out, you won't get the same as what you put in. This is
- because the pixels are encoded in a kind of "folded" encoding. Things
- are encoded in YUV format and the components are weighted. The U and
- V components are alternated when written to the device. Pixels are
- also not square but are taller than they are wide by a ratio of (I
- believe) 1.1:1.
-
- [All of this is from memory and from looking at a piece of code that I
- had sitting around that translates from RGB to Abekas YUV].
-
- A good device but not perfect. Certainly beats the hell out of the
- Sony LVR-5000A we have here for programability and ease of use.
-
- spl
- --
- Steve Lamont, SciViGuy -- (619) 534-7968 -- spl@szechuan.ucsd.edu
- UCSD Microscopy and Imaging Resource/UCSD Med School/La Jolla, CA 92093-0608
- "Far out, man"
- - President George Bush, heard in a stump speech on NPR
-