AVS HD 709 - Blu-ray & MP4 Calibration - Page 95

I'll wait to see if anyone else reports that the PS3 can now play the HDMV download from DVD media. Previous firmware versions for U.S. players were unable to do this.

I received a note from DFrost about a mistake for the luma value stated on page 14 in the PDF. The number has been corrected. I also reread the PDF and made a few other very minor changes. Since no one has reported issues with the PDF download from Dropbox, I did not upload the revised PDF to the w6rz mirror.

I'll assume you can play the video files from the disc using your computer. By default the Xbox cannot play the MP4 video. If the Xbox is connected to the internet it should ask something about updating when you try to play the video for the first time.

The Xbox 360 should be able to play MP4 video after the codec update. From what I remember, I think the general steps at the top of the following link are how you can play video clips from a burned disc http://www.ehow.com/how_6868844_play...-xbox-360.html

I have read statements that basically say the same thing, but I still haven't seen anyone post color measurements after they used blue mode for setting color and tint. If I had a TV with a blue mode, what I would do is start by setting color and tint using the blue mode, and then I would measure both a large and small APL series. The APL series just eliminates any possible brightness change from the TV that could potentially affect measurements, and measuring both series simply gives an idea how much measurements vary. If you want to take measurements for two color runs, they can be put in a zip file and attached to a reply. Without seeing measurements, I can't really comment.

There is also the HDTV Calibration video on the disc or the top Related Link in the first post.

Step 8.4 from the guide deals with measuring color. The measurement patterns here are offered in Windows, Fields, and APL versions. You would need to use the ColorHCFR APL measurement patterns, and choose the Small 75% Color video. After you have taken a measurement run, save the color measurements to a file. Then take another measurement run with the ColorHCFR APL patterns, this time choose the Large 75% Colors, and again save the file after taking measurements.

If you haven't done so already, I would probably switch to the "HDTV - REC 709" reference (see step 1.5 from the guide). When you are at the main screen (measures tab), look to the left of the sensors area and you should see a couple arrows. If you click the down arrow to the right of the "Editable data" text a few times you should uncover a "delta luma" line. The delta luma line compares your relative Y measures against the reference.

The delta luma line says that your blue lightness (brightness) is dead on, which is about what I would have expected from a blue mode. The delta luma line says that brightness for green is also very good. The delta luma line reports red as too bright in comparison to white. If your TV has CMS type of color controls you may be able to reduce red lightness to bring it more in line with the reference. Personally I would probably see if there's a way to get red luma to measure closer to zero, but that's about it.

If you view the CIE diagram your measures don't line up perfectly with Rec 709, but they're not bad. Green and red are inside the reference triangle (undersaturated), yet the hue (angle) of red and green are good. This might just be how either the TV or meter performs. If you haven't already made changes that moved red and green in toward white, or if the TV doesn't offer a setting with wider primaries, there probably isn't a way to move red and green xy position closer to the reference. Maybe blue could be rotated (blue hue adjustment) a bit counter clockwise, but really blue is about as close to reference as can be expected. I'm not familiar with the TV or exactly what color controls Samsung includes, but generally I thought the CIE diagram was very reasonable.


I'm not sure what you mean by modes. I'll assume you meant 75% or 100% color patterns. On these patterns the percentage is usually shorthand to mean percent stimulus. Really the 75% Colors could be said to be 75% Stimulus Colors. The reason I suggested using 75% stimulus colors is because color bars for use with a blue mode usually also have 75% stimulus colors. Anyway, my main point is that using 75% is perfectly fine, and generally that's what I look at first.

Personally I think the "Terminology" and "Adjusting Color using a Color Management System (CMS)" sections from http://www.avsforum.com/avs-vb/showthread.php?t=852536 would be useful to understand if you are going to be adjusting a CMS. I'm sure it took me a while to understand what he's saying there, so at minimum it would probably take multiple reads. Basically the main idea is to get the delta luma line (brightness) of the colors close to zero, and try to get as close as you can to the reference points on the CIE diagram.

I haven't looked at the THQ pattern. The first level above black on the Digital Video Essentials pattern is higher than 17, so with Digital Video Essentials it is possible to use a lower brightness. If you use the lower setting you may lose a bit of information above black, and generally I don't think it makes sense to cut off dark gray information.

Xbox 360 can play MP4 files after a codec update. http://www.ehow.com/how_6868844_play...-xbox-360.html

The download should be 625,325,484 bytes (see Download Note B). The download should decompress to an AVCHD-2d.iso file of 4,692,443,136 bytes (see Download Note A). I recommend using ImgBurn (see Example for Windows Computers).

A few people have reported issues with the .exe, and in that case the .7z is recommended.