Originally Posted by djams
Thanks for the link mcantu1. Very informative. A must-read for anyone who doubts that BD players can be a source of errors.
Part 5 shows significant colorspace conversion error on the Sony BD player. In my opinion, this would mean that calibration settings developed using this device as the source would only be valid for this device. In other words, you are not calibrating your TV, you are adjusting the TV for the combined errors of BD player + TV. This would be the case no matter which of the calibration discs is used.
I'd sure like to see similar testing done on cable/satellite boxes. It'd probably make us all just throw up our hands in despair.
Yes. . . here I am. . . lurking.
Pardon my intrusion, but based on what I am reading here and what I just read over on the xxLH90 thread I have to feel a little self satisfied in that some others are finding out what I have been saying for quite some time now.
1.) Consumer grade BD players (or DVD player) are not calibration devices. Ergo, there is a fallacy in using any consumer grade device as a calibration signal source. Djams may remember me stating this over in the XXLD550 thread.
2.) Also, I have used Panasonic DMP-BD80, Sony BDP-S550, LG BD530 and LG BD550 Blu-ray players (on the same TV) with AVS HD709 and AVIA and found differences.
3.) Many others have sworn this is trivial and not a significant amount of error to make a difference. Csamos comes to mind. Balderdash! True calibration can not be attained unless using a complete chain of calibrated devices and signal sources in the process. In electronics repair and alignment of critical equipment there are standards that are regularly checked and verified.
4.) Others have also asserted that once a "calibration" is obtained on ONE HDMI input for a TV that ALL inputs can be set to these values.. . meaning "Once calibrated, all is calibrated". Again. . . Balderdash! What does a person do about cable or satellite STBs? OR OTA reception from local broadcast stations? You can not assume that all inputs are the same nor all devices output the same color space accurately as the next.
5.) Therefore, "calibration" as termed in the consumer line of TVs is, at best, an approximation.
However, what really matters, in my opinion, is whether you can get a satisfying and pleasing picture on the LCD panel. All is not lost using devices like the Eye-One LT, Display 2, or other devices. It helps us understand these things. I've mentioned this in other threads so it helps to point this next statement out. I've shown my wife, friends, and family the "difference" between "eyeball" adjustments and even the preset modes on my LG 42LD550; as well as the calibrated settings obtained using my Eye-One Display 2. As Djams knows, they all say, "Why do you fiddle so much with the "calibration" for such little difference?" Granted, I can get presets to look pretty darn good because of the "educated" eye I've developed working on so many TVs.
In other words and in my opinion, an owner who is knowlegable can get within 95% of a "calibrated" picture quality using the AVS HD709 media and forget all the inconsistencies we start to realize as we go through the calibration learning curve. Sorry to throw a bit of cold water, but some of this is really a bit of "smoke and mirrors". TVs , BD players, Cable boxes, game systems, etc., are consumer grade
After all is said and done. . . don't throw your hands in the air. Just realize that this really isn't the exact science we would like it to be. Use of a colorimeter is just something we can use to help us a bit, but don't put all your faith in it. Enjoy the TV folks. Tweak it, but don't get too serious about it. A few years ago, all we had was 3 point RGB for gray scale and that was it.
Of course there is more to say about this in technical terms. But, folks. . . let's just enjoy the great picture we can get with just some reasonable adjustments.