AVS HD 709 - Blu-ray & MP4 Calibration - Page 20

I would guess in the direction of the delta E item being related to the display or meter. The encoding isn't my thing, but I think running the grayscale video through a reference decoder will result in no color component in YCbCr.

I checked the original images around 70% before the first reply, so from my usual involvement the only item anywhere in the vicinity of 70% was the shift in the rounding.

The prior AVCHD disk was created off of files files on my computer using Nero 8. There were a number of issues reported with people being unable to burn the iso, so instead I created the iso from Ulead disk this time. Do you still have the Beta2 disk that will play? (To rule out say a player firmware update causing issues) Honestly when I tried the prior AVCHD disk in the Samsung player at Best Buy it didn't work and GetGray also reported the player as not working from DVD.

The process in creating the new disk is basically identical to how the prior disk was created except for how the iso was built. I could do a UDF 2.5 iso from Nero 8 to match the prior disk, but it would be a day or two for me to upload a revised .7z file to try. There was a report on the last page by a3willia saying the Samsung worked with the current disk, but there wasn't enough information to tell what exactly he was using. Anyway what I'm getting at is that your computer software might simply be having some issue with the current iso from Imgburn like people were having issues with the iso from Nero 8. I suppose there has to be some reason why Ulead doesn't offer an iso for AVCHD like they do for HD DVD.

Black is generally defined as color 16 in both SD and HD. For my players it doesn't matter what is used for any grayscale items because the players seem to correctly decode to the same levels. In what you present though, there are a few items that might come into play:

1) The player might not be decoding different sources to the same levels. I'm rather confident my players do not exhibit this issue, but it is possible that some players might. Without a doubt different video types being decoded to different levels is a major issue with my computer so it's possible that the same could happen with certain standalone players. 1080i AVC video doesn't actually match the majority of commercial content, so it is possible that the disk might be entirely irrelevant if a player exhibits this as an issue. One way to check this item is to measure the TV with different sources on similar patterns, but I realize not everyone is going to have a way to meaure light levels for such a check. In that case, one thing you could do is to see if anyone has checked the player model for variation with different sources. I suppose a more basic thing might be to simply check a grayscale ramp with different sources to look for where black is clipping. I'm thinking most calibration disks have a grayscale ramp, the APL should be similar, and if the player exhibiting different black levels is really a problem it might show up in such a simple test.

2) It's possible that what you're seeing is due entirely to the patterns. What I mean is that the patterns on this disk will not match the Average Picture Level (APL) of the Avia disk. The amount of light in the image, the APL, can influence the perceived setting. This can happen in a couple ways - if your TV has a dynamic setting it's possible that the black level might vary depending upon the APL, but more likely is the possibility that different APLs might cause your eye's iris to open or close and influence how high you have to set the black level to see differences in dark grays. Generally the way this item appears with my equipment is that the black clipping pattern on the AVS HD disk is absolutely the lowest that I can set black-level, and in order to make out differences in dark gray with a higher APL pattern I might have to turn up black level. What I mean is that the setting from the black clipping pattern might still be causing the grays to be different shades, but due to a lot of white in a pattern I might not be able to make out the difference without turning up the black-level. Again on my sources this isn't really an issue when I checked the AVS HD disk against the DVE, AVIA, and GetGray patterns, but it somewhat falls into a more subjective area where equipment and other settings might also come into play.

Have you checked the disk against the iso? There's a feature in Imgburn that can compare information. I have to assume it's a burner or media issue and trying either a different computer or disk type might clear it up, because there have been few reports of problems with the HD DVD version. It's simply a Ulead Media Factory 6+ iso, so http://www.avsforum.com/avs-vb/showthread.php?t=705146 might be of help but I'm not aware of anything special about the A3.