Originally Posted by RBFilms
Pass Through mode does not guarantee signal integrity. There are AVR's on the market that can ... and do ... affect the integrity of the signal even in Pass Through mode.
That is a cop out. In my research for a receiver, Pioneer support stated that the 919AH-K does NOT change any data in the signal, it's simply a "repeater" with NO video processing of any kind. Data integrity isn't an issue I would be getting errors.
Also, did you calibrate your BD Player? They can ... and do ... have an impact on the signal.
My blu-ray player is running in a mode where picture settings are not adjusted or altered. Calibrating a blu-ray player shouldn't be necessary if it's not altering the video data that is read from the disc.
I can honestly say that the Patterns on Disney WOW are reference to a Test Pattern Generator. I would also be willing to bet money on the fact that S&M and DVE Patterns are also accurate.
I have not questioned any of the test patterns except "contrast". The differences between different patterns cannot be judged any other way but "different" when the settings are checked. This is not happening with just myself. This can be seen by simply reading the settings results people come up with when using the WOW calibration disc and the DVE disc. They are different.
We also produce patterns that are Industry Standard Reference. There is no variable in this area...it either adheres to a reference..or it is does not. They all yield very similar results.
Not on contrast.
If you are getting discrepancies between the discs and your internal patterns...you need to check your entire chain with a test pattern generator, software, and a very good meter.
I would believe you and would bother checking if this weren't a widespread and easily identifiable difference seen by all users who have reported their DVE and WOW settings.
Outside of color & tint ... which can vary slightly between discs due to the accuracy of the blue filters ... Brightness & Contrast should be similar. Disney WOW has a very accurate blue filter by the way. Yes, still not as good as a $14,000 meter and $2,500 worth of Software and an experienced ISF Technician doing the job ... but it yields surprisingly good results for a Blue Filter.
I haven't seen a problem with color or tint settings. Those are virtually identical settings from different patterns. Let's try to focus on the setting we're talking about: contrast
One thing to note...is the level of accuracy on the brightness and contrast patterns...some have finer gradients than others. Disney WOW uses a 1% gradient scale.
Level of gradient 'might' make a difference in a user's final choice of setting 'if' the instructions weren't clear enough so that the user can identify how to set the TV to the pattern or what to look for. Otherwise, the setting should end up at least in the ballpark with other "industry standard" test patterns. In regards to "contrast", users are NOT ending up in the ballpark from one pattern to the next.
Last but not least, if you are finding discrepancies between the discs, there may be a subjective factor in how the test patterns are being used or read by the user.
Ah, yes and this is where I think you may have the only point, but I find it difficult to chalk it up to "user error" when in the thread for my LH90 TV, people who have set the TV's gamma, color gamut and black level the same, we all get very close settings results, which has me believing it's being done correctly by most users. And remember, these people in that LH90 thread have different blu-ray players, so it's highly unlikely the blu-ray players are introducing much of any difference in the picture.
With all that factored in, you may get slight discrepancies due to the gradient scale and human factors ... but I do not think they should not be off by a great deal from each other.
They are. You should actually LOOK at the settings people are getting when using the same TV model (I recommend visiting the threads people create for the individual TV models) and you'll see when all factors are equal (like TV settings, gamma, black level, etc which might effect the outcome of the picture settings) that users are getting significant contrast results from one test pattern to another.
I do know the patterns on the discs I mentioned are reference quality and adhere to an industry standard.
Outside of what I mentioned above, I cannot be sure why the results are different.
I think it's rather clear what to hypothesize based on the information I've found on this site from reported settings from users who I have confirmed have identical model TV's & identical TV settings, that either
a) The test patterns are not giving standardized results
b) The TV's themselves are responding differently to the different test patterns due to some weakness in the technology the set is using or is simply not designed to display a consistent result with different test patterns.
It's one of those two. I have not looked into the results of these different patterns on plasma tvs, but if the plasma tvs also suffer from the problem, I would start to question the consistency of contrast test patterns across the different discs, or we would have to qualify that contrast is a setting much like sharpness where even the same model TVs will produce different/inconsistent errors based on circuits or parts and their reaction to the patterns.