DVL-Digest 1176 - Postings: Index Did Mark Schubin chump 24p? Re: Did Mark Schubin chump 24p? - (2) Did Mark Schubin chump 24p? - Adam Wilt > 16:9 chips shoot > true 16:9, and employ "fake" interpolation to get down > to 4:3. They don't use a subset of the chip, as is > commonly believed: they electronically resample and > scale -- even the vaunted 16:9 Sony DSR500 uses > electronic resampling to generate its 4:3 frame. (If > you don't believe me, it's in the manual, look it up.) Um, how? The image on the monitor is *exactly* what I'd get if the CCDs were simply read out from the central 75% of each scanline, losing the outer panels but preserving the height and vertical resolution exactly. Each (analog) scanline is differently sampled in 4:3 compared to 16:9, and there are 25% fewer pixels used in forming the 4:3 image, but the resolution-buggering reinterpolation of the scanlines themselves is NOT done in a true 16:9-chipped cam. The image I get from a DSR-500 in 4:3 is exactly what I'd expect from a 4: 3 cam with the same number of effective pixels in the 4:3 center panel of the chips. Are we perhaps saying the same thing? If not, then a lot of my buddies at Sony and Panasonic are liars -- as are my own eyes. I'd hate for that to be true. Cheers, Adam Wilt [Any bizarre line breaks courtesy of OS X's Mail.app. Think Different!] Re: Did Mark Schubin chump 24p? - "Perry Mitchell" From: Barry G We all frequently complain about "fake 16:9" mode on 4:3 chips, and moan for the days when we can have true 16:9 chips... but rarely do we stop to consider that having true 16:9 chips mean we will be saddled with "fake 4:3". 4:3 chips shoot true 4:3, and have "fake" interpolation to get up to 16:9. 16:9 chips shoot true 16:9, and employ "fake" interpolation to get down to 4:3. They don't use a subset of the chip, as is commonly believed: they electronically resample and scale -- even the vaunted 16:9 Sony DSR500 uses electronic resampling to generate its 4:3 frame. (If you don't believe me, it's in the manual, look it up.) Re: Did Mark Schubin chump 24p? - "Perry Mitchell" From: Barry G I, for one, am glad Panasonic made the camera 4:3. To have made it 16:9 would have seriously compromised the picture quality for 99% of the US marketplace. (PAL users might have a legitimate gripe, because of the wider adoption of 16:9 TV in PAL countries). (diese posts stammen von der DV-L Mailingliste - THX to Adam Wilt and Perry Mitchell :-) [up] |
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