The Secrets Blu-ray Player HDMI Benchmark - Part 2


Test 2 Summary and Results

For this test, we calibrated the display using Player B, and then measured it using the Lumagen Radiance to see what our display is actually calibrated to. In the charts, the values marked as Player B are what we measure when using Player B as our test pattern source, and Actual is what we measure when using the Lumagen Radiance as our test pattern source.

Using the internal CMS of my display, you can see that we appear to have actually managed to get a very good calibration done. The grayscale error is down to nearly nothing and the RGB tracking is far better than before. At least we think we have a good calibration, so we will use the Lumagen and see what the actual readings from the display are when using a correct source and how those now compare to our target values.

This time we notice that our gamma value is dropping down a lot from what we thought it was to something much lower. The dE for our grayscale is going up across the board, and our peak luminance value is much higher than expected. Looking at the color errors we see that while our blue error is lower than expected, all of our other colors have higher dE values than we thought they did.

The real world implications of this would be that any sources using this display would lose a lot of their contrast due to the incorrect gamma curve, we could suffer from blown-out highlights as our peak white value is coming out much brighter than expected, our grayscale is not as accurate as expected, and our colors show more error than expected. By calibrating this display to account for the incorrect decoding of Player B, we have messed up the settings for all other components that would correctly display.

The biggest sin is really the incorrect gamma, which will cause your image to lose a lot of it's pop, no matter if it's color or black and white, as it will flatten out and dull the range of contrast you can expect in your display.