Originally Posted by tbrunet
OK..by accident that monitor measured exactly like I predicted it would. According to Ikegami they are designed to have a ruler flat response when nominally calibrated.
I guess the Dr. just got a malfunction Sony monitor that day, measured it and wrote that displayshoot article.
You are still avoiding the question. You claim you don't purposely mislead people, but here you are again with your usual tactics. Is what you claimed about what Charles Poynton's position true or false? Are you going to be a man for once, or keep avoiding it?
The disagreement between Dr. Soneira and Charles Poynton about the gamma numbers could be explained by the paper you yourself posted from Charles Poynton where he said, "The alleged wide variation comes from variation in offset term of the equation, not the exponent: Wide variation is due to failure to correctly set the black level."
Dr. Soneira told me in email that he did not setup either the white level or the black level of the display for mastering (but for a dark environment with white way up there) and Charles Poynton could say that the black level was set different than he felt was correct. I don't know if that is what he would say, but based on his article it would fit.
It is also amusing how you are now sticking with Dr. Soneira, a person who told you twice that you were wrong and was obviously not happy about you misrepresenting his position when he posted over 3 years ago now:http://archive2.avsforum.com/avs-vb/...&&#post8121654
Originally Posted by tbrunet
I want to publicly thank you Dr. Soneira! You have validated my position on the direct correlation between CR ratio and Bit Depth. FWIW you are the only professional on this forum to do so!
Originally Posted by Raymond Soneira
First of all, I have not previously participated in this discussion, I certainly have not validated the above, and I strongly object to anyone using or invoking my name without my explicit permission.
Second of all, the above statement that the Contrast Ratio, CR, depends on bit depth is categorically wrong. CR is the ratio of Peak-Level Luminance to Black-Level Luminance. Those two special levels are absolutely independent of the Bit Depth, the Gamma Function, and the Transfer Function. Note, however, that all of the levels that lie between the Peak-Level and the Black-Level (17 to 234 for digital video or 1 to 254 for full range PC images and video) do explicitly depend on the Bit Depth, the Gamma Function, and the Transfer Function. Also, the digital levels near the Black-Level will be affected by the Contrast Ratio. I hope this clarifies my position. I consider the matter closed and will not be drawn into Ringer discussions of this type.
After he basically asked you not to misrepresent his opinion and after the owner of this forum even asked you basically the same thing you spent the next couple of years or so misrepresenting one of Dr. Soneira's opinions since he wasn't going to play your game and keep correcting you here, and now here you are using him again as proof that you are right. You did that before about stuff you were obviously wrong about, which is interesting because before you were using that section of his article to say that things were linear and so you were right about 219:1 being the highest on/off CR possible and now you are using basically the same section to claim that things aren't linear, but follow a 2.2 gamma curve. I know you spent more than a year with your "linear" game from that one section even after I had explained it to you (linear on a log-log graph is not the same as linear in linear space), so how did you magically come to understand it and take it as gospel that CRTs have 2.2 gamma as setup for mastering?
To be clear, maybe they are 2.2, but tbrunet is not a trustworthy person on things like this. He has shown how he will claim the most incredibly ignorant stuff from a person in the industry and after it is explained he will try to continue convincing people to believe the dumbest things (like his stuff about it being impossible for on/off CR to be higher than 219:1 or 1000:1).
Here tbrunet could be a man about what Charles Poynton's stated position is, but I don't expect tbrunet to all of a sudden show himself to be intellectually honest after what he has proven about what he will do over the last almost 4 years.
tbrunet will grasp onto pretty much any industry expert he can. Since they aren't here he can misrepresent their position, like he did with Dr. Soneira over and over.