DVL-Digest 547 - Postings: Index D9 FCP and a G3?? Holoset (was: D9) MTF CTF Sharpness Whatever Wide Angle Lens, better 0.7x o D9 - Adam Wilt nospam-adamwilt@flash.net > Hey, Adam--have you seen any side-by-side comparison > between DVCPRO50 and Digital Betacam? Yes. They looked pretty much indistinguishable. The EBU did a blind test (unfortiunate name for a visual comparison!) which I have posted at http://www.adamwilt.com/EBU-DV.html. In it, they find: "At normal viewing distance and for moderately critical sequences, experts had difficulty to identify differences between the performance of the algorithms of the two digital compression systems. "For the first generation, the performance of Digital-S compression and the compression used in Digital Betacam was rated to be identical. "At fourth generation, the performance of Digital-S compression and the compression used in Digital Betacam in the multi-generation scenario is similar. The picture quality of non-critical sequences is practically preserved by both systems. Differences between system performance are detectable on closer scrutiny and can be described as "softness in areas of high picture detail" for Digital-S compression and "increased coding noise" for compression used in Digital Betacam. "At seventh generation, the different behavior of the two compression algorithms becomes more apparent. The effects described for the fourth generation performance are slightly accentuated. For moderately critical sequences, the level of impairment was very low and did not compromise the overall picture quality. On direct comparison, picture quality provided by Digital Betacam compression was considered to be slightly better than that achieved with Digital-S compression. This is mainly due to the different subjective effects of "softness" and "coding noise" on perceived picture quality." Copyright (c) 1998 the European Broadcasting Union (EBU) and the Society of Motion Picture and Television Engineers, Inc. (SMPTE). Excerpt used with permission. Cheers, Adam Wilt a DV FAQ: http://www.adamwilt.com/DV.html FCP and a G3?? - Adam Wilt nospam-adamwilt@flash.net > Is anyone using a G3 and FCP successfully? I have a 233MHz beige G3 and > am getting tired of AP 5.1. and calling ProMax tech support. Can the G3 > be upgraded with a higher speed cpu to work with FCP? You can upgrade the CPU, but my understanding of the 233 MHz beige is that the bus speed is the limiting factor, not the CPU. I recall seeing multiple posting to that effect on firewwug, 2-pop, and (in olden times) on this list as well. I use a PB G3/266 with the faster bus, and it's on the edge of workability; officially it isn't supported. Cheers, Adam Wilt a DV FAQ: http://www.adamwilt.com/DV.html Holoset (was: D9) - Adam Wilt nospam-adamwilt@flash.net > Play has now shipped their Holoset (man, it took them long enough). Par for the course with Play. At least they *did* ship it! > Doesn't this use luma keying? Alas, no, it's a chroma key (blue"screen" technique). 4:2:2 formats will still do twice as well on sharp-edged keys with Holoset as 4:1:1 or 4:2:0 formats. Cheers, Adam Wilt a DV FAQ: http://www.adamwilt.com/DV.html MTF CTF Sharpness Whatever - Adam Wilt nospam-adamwilt@flash.net > Adam Wilt has written a good summary... in DV Magazine for August. > > Yo Adam, good stuff. Thanks! Now I know at least *one* person reads these things! Cheers, Adam Wilt a DV FAQ: http://www.adamwilt.com/DV.html Wide Angle Lens, better 0.7x o - "Perry" This is not a rule but an observation: 0.7 is often usable at all zoom positions (sometimes called zoom through) whereas 0.5 is restricted. If you are looking at wide-angle adapters, there are two obvious problems that often crop up: 1) The adapter causes vignetting (corner cutting) at the widest angle 2) The adapter gives excessive lens flare, partly due to protruding front element. 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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