Date: Fri, 4 Feb 2000 21:17:58 -0500 (EST) From: Chuck Robey <chuckr@picnic.mat.net> To: "Kenneth D. Merry" <ken@kdm.org> Cc: Tim Pozar <pozar@lns.com>, freebsd-multimedia@FreeBSD.ORG Subject: Re: Hauppage WinTV-D Digital TV receiver Message-ID: <Pine.BSF.4.21.0002042116150.23833-100000@picnic.mat.net> In-Reply-To: <20000203224546.A58186@panzer.kdm.org>
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On Thu, 3 Feb 2000, Kenneth D. Merry wrote: > I agree that it would be better to have full resolution HD. Of course it > can't be done (using the method the Brooktree chips use, and the method > that this Hauppauge board uses) with 32 bit 33MHz PCI. It would take up > a significant fraction of the available bandwidth with 64 bit 33MHz PCI. > > It becomes more of a possibility with 64 bit 66MHz PCI, though. > > (1920 * 1080 * 24bpp = 6.2MB/frame, * 30 frames/sec = 187MB/sec) > > FWIW, professional uncompressed HD runs over 1.5Gbps serial digital links. > > There are only a couple of ways that I can think of that you could do HD on > most PCs out there today: (i.e. PCs with just 32 bit 33MHz PCI) > > - Have a tuner board that sends the ATSC MPEG stream over the PCI bus to > the graphics board, which would also need an integrated MPEG decompression > chip. > > - Put the tuner and MPEG decompressor on the graphics board. > > Then there's the fact that most monitors don't have the horizontal > resolution to fit 1920 pixels. So you'd have to downconvert it somewhat > anyway to fit it in a window. (Interestingly enough, you can display HD on > a standard monitor with coax inputs -- most decent monitors have the > bandwidth to do it.) What with LCD screens getting larger, I am expecting a 1920X1080 LCD screen to be available. I don't think it will be cheap; I think it will be damned expensive at first. I also think that, at whatever price they ask, it'll be hard to resist, if it can do computer screens and HDTV. ---------------------------------------------------------------------------- Chuck Robey | Interests include C & Java programming, FreeBSD, chuckr@picnic.mat.net | electronics, communications, and signal processing. New Year's Resolution: I will not sphroxify gullible people into looking up fictitious words in the dictionary. ---------------------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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