AVS HD 709 - Blu-ray & MP4 Calibration - Page 134 - AVS Forum
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post #3991 of 3995 Old 08-18-2014, 02:51 PM
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Quote:
Originally Posted by Josh128 View Post
I used the disc and to my surprise found my settings were crushing whites and oversaturating colors quite a bit.

One question though, does anyone know if theres a similar disc I can download for SD DVD players? I'd love to be able to do a basic black/white crush and color saturation setting on my component inputs for my game systems-- I have a Sony DVD only player and a PS2, but the AVCHD DVD wont play in them.

Any suggestions for a pattern disc that works with SD DVD players?
This: http://www.calibrate.tv/. It's downloadable but not free. I liked it better than the commercial discs of the DVD era. Some of the patterns are used in AVS HD 709.

I recall free mpeg2 patterns somewhere. Check the calibration forum.

-Bill
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post #3992 of 3995 Old 08-18-2014, 03:53 PM
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Originally Posted by wmcclain View Post
This: http://www.calibrate.tv/. It's downloadable but not free. I liked it better than the commercial discs of the DVD era. Some of the patterns are used in AVS HD 709.

I recall free mpeg2 patterns somewhere. Check the calibration forum.

-Bill
Will do, thanks!
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post #3993 of 3995 Old 08-18-2014, 11:13 PM
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If anyone is interest, I have created new APL patterns which gave me perfect greyscale tracking without any tint on my Plasma.
Just scroll down from THIS post downwards to understand what I did and why I needed new APL patterns with my plasma.

BTW. It would be very nice if someone could teach me how to generate a standard 16-235 MP4 video like the ones on the AVS709 disk from my PNG images.

Thanks.

Here is how my APL slides look like:


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Last edited by James Freeman; 08-19-2014 at 06:57 AM.
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post #3994 of 3995 Old Yesterday, 09:54 PM - Thread Starter
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Originally Posted by James Freeman View Post
Here is how my APL slides look like:
Since I don't have a plasma to test, I've generally been curious if large areas of white in a test pattern might tend to skew xy measurements. Larger measurement areas generally make an image more practical for small displays and projectors. On the other hand white is rather uncommon for many images, so without testing it may make sense to limit the amount of bright areas in a pattern, similar to the example above. In spite of all the discussion around which patterns to use on plasma, there isn't a lot of data to look at in my opinion, but Chad B's measurements on his own APL pattern seem to indicate some clear xy variation against other measurement patterns, so I have to wonder if the bright areas might be a part of the usual complaints about prior fixed-luminance measurement patterns.

The Chad B APL pattern has an APL around 19%, but it has larger measurement areas like white, so the average luminance is around 13% for a 2.2 gamma. The example above seems to have an APL around maybe 26%, and an average luminance about 8% at 2.2 gamma. The example above seems a reasonable average in comparison to the numbers that Zoyd posted, and I doubt if the lower average luminance would hurt in comparisons against typical patterns. Gamma measurements should be generally similar to the trends from other fixed-luminance patterns, but I'm not sure how RGB would turn out or what people might subjectively decide about measurements on various plasma displays. Personally I tend to agree that when using a display type that is known to vary depending on the image displayed it makes sense to have some other reference, like another display that does not vary depending on the displayed image, but as far as I can tell such considerations are not the general forum opinion.

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BTW. It would be very nice if someone could teach me how to generate a standard 16-235 MP4 video like the ones on the AVS709 disk from my PNG images.
The process used for this project is generally covered in:
AVS HD 709 - Blu-ray & MP4 Calibration

Last edited by alluringreality; Today at 12:34 AM.
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post #3995 of 3995 Old Today, 12:39 AM
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Thanks alluringreality.
BTW how do you measure APL and Luminance to get these % numbers?

My plan is to improve my APL pattern eve further by:

Measure the luminance of a small white square in the middle of the screen while a movie plays in the back,
I will take several luminance measurements of this square throughout several scenes and different movies.
Now I will average the luminance readings of this square to get a certain number.

Now I will play my APL pattern with the same white square in the middle and choose the most accurate grey background to match the average luminance of the white square that I measured on top of the movies.
This would give me the most accurate average of grey shade for my background.

Although every plasma TV has a different APL+ABL behavior, a typical movie APL will trigger some ABL in any kind of plasma.
I think this will be enough to be a one size fits all pattern.

The new pattern should be just the perfect balance between APL and ABL to calibrate a Plasma for Movies or TV.


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HTPC (MPC-HC, MadVR), PS3.
Studio Monitors + Polk Audio PSW110 Subwoofer.

Last edited by James Freeman; Today at 12:53 AM.
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