Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!evax!evax!lindahl From: lindahl@arrisun3.utarl.edu (Charlie S. Lindahl) Newsgroups: comp.ivideodisc Subject: Re: DVI questions Message-ID: Date: 16 Jan 91 08:33:17 GMT References: <573@hydra.bucknell.edu> <1991Jan15.040230.26507@gpu.utcs.utoronto.ca> <425@newmedia.UUCP> Sender: usenet@evax.arl.utexas.edu (USENET Dummy account for GNUS and TheNews) Followup-To: comp.ivideodisc Organization: Automation and Robotics Research Institute, U Texas @ Arlington Lines: 32 In-Reply-To: jim@newmedia.UUCP's message of 15 Jan 91 15:09:30 GMT In article <425@newmedia.UUCP> jim@newmedia.UUCP (Jim Beveridge) writes: The first chip to do JPEG is from C-Cube, and they are currently only shipping the still frame version of the chip. The real time version is still not available. Even in compressed form, the bandwidth required for a full JPEG screen far exceeds the abilities of an IBM bus to transfer. (I don't believe it to be a problem for the Apple NuBus) JPEG still requires LOTS of data moving around. To keep track of it, you pretty much require the full resources of the system to move it off the hard disk and pump it into the chip fast enough. I understand that the high-end color NeXT is using JPEG compression on their DIMENSION board (using the C-Cube chip). I assume that the bus width on the NeXT (being NuBus, and faster than Mac's NuBus) should be able to handle the compressed video (citing from the previously-submitted article). Does anyone know the details of the Dimension board to be able to tell us that's wants to know? Has anyone actually SEEN real-time compressed video on a DIMENSION-equipped NeXT? -- Charlie S. Lindahl Automation and Robotics Research Institute University of Texas at Arlington Internet EMAIL: lindahl@evax.arl.utexas.edu Standard disclaimer: Ain't no opinion but my own.