DVL-Digest 725 - Postings: Index Bumping to Betacam (was DSR20 vs. DSR11) OT - Processor heat Bumping to Betacam (was DSR20 vs. DSR11) - nospam-adamwilt@flash.net > 1) I've never used S-video. Any engineers on the list > care to contrast S-video vs. analog component dubs > to Betacam? There's a bit of a difference in the color sharpness, to be sure, as well as a bit of difference in color noise. But the difference between YUV and Y/C is way less than the difference between Y/C and composite! > 2) Even if I bought a DSR-40 DVCAM with component outs, > would I be significantly better off to hire DVCAM-to-Betacam > bumps be done to a BVW-class broadcast Betacam instead of > my do-it-yourself solution dubbing to an "industrial" UVW-1800 > Betacam? (in other words, UVW Betacam vs. BVW Betacam) The BVWs have wider video frequency response and better audio (even on the linear tracks; UVWs don't have AFM) than the UVWs do. But as to how significant the difference is? I'd suggest doing a test with your typical sort of material: dub on a BVW, and dub the same on a UVW (or "Betascum" deck, grin). Play 'em back. Only you can say how much of a difference is "significant" for your purposes! If you shoot with edgy enhanced pix on a high-end camera, you'll probably see it. If you shoot on a VX1000 with th e sharpness backed off entirely, you may not. You may also *prefer* the UVW dub: the BVW is more likely to preserve fine mosquito noise and other artifacting whereas the UVW may smooth it over a bit more. All of these tend to be subtle differences once you're past the Y/C vs. composite level. Things may be visible in side-by-side tests, but if you were shown a Betacam image out of context you might be hard pressed to say whether it was dubbed in Y/C on a UVW or in YUV on a BVW! Cheers, Adam Wilt OT - Processor heat - "Perry" Question for Dave Haynie and other knowledgeable processor folk: I tested a laptop Vaio recently with a PIII and was astonished and amused by how directly the processor heat related to the work it was doing. At normal 'tickover' there was almost no apparent heat generated, but give it an EditDV render to perform and within seconds the internal fan had jumped into top gear and was spewing out a stream of hot air to rival my daughters hair dryer! At the end of the render it drops back to 'tickover' heat. Is this common to all processors or is it peculiar to the installation in the Vaio? If I dissed the mains power(reverting to battery) the Intel system dropped the processor speed from 750 to 600MHz, and this seemed to make a vast difference to the heat generated, definitely out of proportion to the nominal speed change. This is intriguing me, so I wonder if a simple explanation of what is happening is possible? Perry Mitchell Video Facilities http://www.perrybits.co.uk/ (diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-) [up] |
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