Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!lll-winken!taco!hobbes.catt.ncsu.edu!kdarling From: kdarling@hobbes.catt.ncsu.edu (Kevin Darling) Newsgroups: comp.sys.amiga.advocacy Subject: Re: The Amiga's Future Message-ID: <1991Jun19.081435.1213@ncsu.edu> Date: 19 Jun 91 08:14:35 GMT References: <1991Jun18.104100.12869@marlin.jcu.edu.au> <1991Jun18.131000.29178@news.iastate.edu> <66@ryptyde.UUCP> <1991Jun19.073024.3841@mintaka.lcs.mit.edu> Sender: news@ncsu.edu (USENET News System) Organization: North Carolina State University Lines: 26 >>Well it's too late for Commodore to become the first. The Macintosh OS is >>the first to have JPEG and MPEG compression/decompression built in (in the >>File Manager level, so present applications work with it). :-) > > I doubt it has MPEG built in, maybe JPEG, but certainly not > "reeal-time decompressing JPEG" Even with a Mac IIfx it wouldn't > be real time, so it's not much use for anims (e.g. Quicktime) Yah, I don't think MPEG is included with Quicktime yet either. The three main compression algorithms to be given with the first release, and the claimed specs, are: Photo Compressor - this uses an ISO-baseline software JPEG. Ratios: from 5:1 to 100:1 Speed: for 640x480x24-bit: 10 seconds on IIcx, 4 seconds on IIfx Animation Compressor - Apple-written RLE method for computer gfx/anims. Speed: up to 30fps, depends (as on any machine) on image deltas. Video Compressor - Also Apple-written method. For digitized video. Ratios: from 5:1 to 25:1 Speed: decompress fullscreen in 1/2 second for IIcx, 1/5 second for IIfx. Later, hardware methods will replace the software, of course. Kevin