One problem (among others) is that as far as I can tell, most home plasmas and LCDS have a gamma closer to 2.2, and even THX seems to spec a gamma of 2.2 for THX certified displays. Also, more and more people are viewing content on various sRGB displays like laptop screens, ipads, iphones, etc.
Although trying to take those devices into account will make you insane, it does seem like it makes the move to standardize gamma at 2.4 a little questionable when all those devices are sRGB which has a gamma of 2.2
Yuck.
-N
p.s.
have you put your OLED next to a plasma or CRT and shot both with a probe, and compared them visually? I'm very curious for someone to do this, and see if their results match what I saw with the OLED and DLP projector.
On Mar 2, 2012, at 2:23 AM, Terence Curren wrote:
> 709, but only because it is a little wider then SMPTE C. The whole area is in flux right now. Very disconcerting to try to latch on to a standard when there really aren't any. :-(
>
> --- In Avid-L2@yahoogroups.com, Nat Jencks <natjencks.lists@...> wrote:
> >
> > Terry, so you are using SMPTE-C as your gamut rather than rec709? Is this common practice in the TV world?
> >
> > Most facilities that i've worked with in the feature film world use rec709 primaries for "rec709" calibration despite the fact that it was originally conceived as a camera spec. Ive been using rec709 primaries and gamma 2.4 (per the new ISO rec1886 spec) for "rec709" work.
> >
> > Not saying one is "right" and the other "wrong", just trying to get an idea of what assumptions others are making about these vague standards.
> >
> > Ughh.
> >
> > Also, what are you using to calibrate your OLEDs? When put side by side with a 3chip DLP projector and calibrated to the same primaries and white point with a PR655 (and confirmed with a i1d3 probe) the OLED views as far too green. Apparently this has to do with the spectral distribution of the light emitted by the OLED.
> >
> > Has anyone put their OLED side by side with a calibrated CRT or plasma and measured the white point and compared with what they are seeing? I've only done this with my OLED and a DCI projector.
> >
> > best-
> > -Nat
> >
> > On Feb 28, 2012, at 7:03 PM, Terence Curren wrote:
> >
> > > REC 709 is a camera spec. It has always been only a camera spec.
> > >
> > > --- In Avid-L2@yahoogroups.com, "johnrobmoore" <bigfish@> wrote:
> > > >
> > > > Are you running SMPTE-C or Rec 709. Manual suggests SMPTE-C for N. America. What do others feel. I must say I got to watch down a 23.976 documentary shot on XDCam and color corrected out of house and it looked great. Very simple show but the image quality was impressive. The Sony just paid for itself, at least as far as my eyes are concerned. My wife might feel differently. Oh well she just got a new car so I needed a new gadget. ;-)
> > > >
> > > > --- In Avid-L2@yahoogroups.com, "Terence Curren" <tcurren@> wrote:
> > > > >
> > > > > Tested this out today. I don't see a difference in the black "level" but I am viewing SDI as that is how my rooms are set up.
> > > > >
> > > > > What is interesting though is looking at a B/W Ramp signal and turning the flicker free on and off. The steps between black and gray harden up when the flicker is turned off. So I would say something is going on. Just not sure what.
> > > > >
> > > > > --- In Avid-L2@yahoogroups.com, "Wilson" <wilsonjchan@> wrote:
> > > > > >
> > > > > > The setting I used was Rec. 709 color space and 2.2 Gamma. I wonder if the flicker-free function is ignoring the gamma setting...
> > > > > >
> > > > > > --- In Avid-L2@yahoogroups.com, "Terence Curren" <tcurren@> wrote:
> > > > > > >
> > > > > > > I hope not Wilson! I haven't checked that on mine yet, let me look tomorrow and get back to you.
> > > > > > >
> > > > > > > --- In Avid-L2@yahoogroups.com, "Wilson" <wilsonjchan@> wrote:
> > > > > > > >
> > > > > > > > I just got my PVM-2541 back from the upgrade. While playing back some 24P material over HDMI, I noticed that the dark areas got darker when I engaged flicker-free. Is this black crush normal?
> > > > > > > >
> > > > > > > > --wilson
> > > > > > > >
> > > > > > > > --- In Avid-L2@yahoogroups.com, "Terence Curren" <tcurren@> wrote:
> > > > > > > > >
> > > > > > > > > I'm with you. I'm used to the flicker, but the smear is irritating.
> > > > > > > > >
> > > > > > > > > --- In Avid-L2@yahoogroups.com, Jay Mahavier <jay_mahavier@> wrote:
> > > > > > > > > >
> > > > > > > > > > Point taken. It's mostly what your perception can adjust too. Myself, I don't notice the 24fps flicker unless there is something running at a different rate in the room. And even then it's just a mental adjustment on my part and i'm over it. But the smear can drive me nuts. While there are others I work with that no matter how bad it is don't ever see it.
> > > > > > > > > >
> > > > > > > > > > Jay
> > > > > > > > > >
> > > > > > > > > > On Feb 15, 2012, at 6:48 PM, Terence Curren wrote:
> > > > > > > > > >
> > > > > > > > > > > The issue at hand is that 24 fps isn't fast enough for the human eye. This is why there are 2 openings in the shutter of a film projector. You are actually seeing 48 image flashes per second in the theater.
> > > > > > > > > > >
> > > > > > > > > > > --- In Avid-L2@yahoogroups.com, Jay Mahavier <jay_mahavier@> wrote:
> > > > > > > > > > >>
> > > > > > > > > > >> Ah, the user selectable disappointment. Vastly better than the manufacture imposed disappointment.
> > > > > > > > > > >>
> > > > > > > > > > >> Jay
> > > > > > > > > > >>
> > > > > > > > > > >> On Feb 15, 2012, at 1:46 PM, Terence Curren wrote:
> > > > > > > > > > >>
> > > > > > > > > > >>> Yes it adds some smear but not as bad as LCDs. The fix allows you to turn the mode on or off. So you have the best of both worlds.
> > > > > > > > > > >>>
> > > > > > > > > > >>> --- In Avid-L2@yahoogroups.com, Jay Mahavier <jay_mahavier@> wrote:
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> so the fix for the flicker introduces smearing? You end up with one or the other? Hmmmm.
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> Jay
> > > > > > > > > > >>>>
> > > > > > > > > > >>>> On Feb 15, 2012, at 11:30 AM, Terence Curren wrote:
> > > > > > > > > > >>>>
> > > > > > > > > > >>>>> If you have a PVM 2541, Sony has a hardware fix that will eliminate the 24P flicker that is bothering some folks. Call their support number and ask to get yours repaired. Unfortunately, it needs to be sent in for the fix, but they will send a shipping box and the shipping is covered both ways.
> > > > > > > > > > >>>>>
> > > > > > > > > > >>>>> If you came from CRTs, you probably didn't notice anything because it's exactly the same as CRTs. If you came from LCDs, which have slower response times you never saw any flicker (but you were seeing smearing in stead). Now you can have it either way you like it with the new fix.
> > > > > > > > > > >>>>>
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> > Nat Jencks
> > DI / Color / VFX
> > New York City
> >
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> > [Non-text portions of this message have been removed]
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