Shod I trust AVSHD or GCD? - AVS Forum
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post #1 of 10 Old 02-01-2013, 01:57 PM - Thread Starter
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Hi,
When I was checking my greyscale I made some discovery.
I have different results if I measure with AVSHD window pattern or GCD Window pattern.

Which one shod I trust?


AVSHD709 Window pattern:



GCD APL pattern, I have the same results at GCD Window pattern:


I have LG 60PA550 Plasma

So which one shod I trust?
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post #2 of 10 Old 02-01-2013, 08:08 PM
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try to do multiples measurement with the same pattern to exclude reading errors, undo your setup, re-do it and try again.,..
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post #3 of 10 Old 02-02-2013, 12:30 AM
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One of the things I noticed is you are using GCD APL patterns, all depending on your monitor I would not expect identical results from the 2 patterns. Also avshd709 rounds down to neatest integer, where gcd uses mathematical roundings. What software are you using?
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post #4 of 10 Old 02-02-2013, 12:33 AM
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I.must be blind sorry wink.gif
If you are using generic calibration disk in calman? Then use gcd as calmal uses 50% to calculate gamma so the mathematical rounding would be correct.
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post #5 of 10 Old 02-02-2013, 01:11 AM - Thread Starter
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Quote:
Originally Posted by visca blaugrana View Post

I.must be blind sorry wink.gif
If you are using generic calibration disk in calman? Then use gcd as calmal uses 50% to calculate gamma so the mathematical rounding would be correct.

Yes i use calman.

So gcd is The best disc for me?
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post #6 of 10 Old 02-02-2013, 02:05 AM
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Quote:
Originally Posted by visca blaugrana View Post

I.must be blind sorry wink.gif
If you are using generic calibration disk in calman? Then use gcd as calmal uses 50% to calculate gamma so the mathematical rounding would be correct.

Do you also know what method uses chromapure ?

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post #7 of 10 Old 02-02-2013, 02:49 AM
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Let me clarify as I could be misunderstood. Avshd709 is not wrong its all about how the software works. DVE and AVSHD709 has the same values, and the difference is minimal to gcd. In this instance I think the difference is down to apl vs windows.

I think chromapure uses % aswell but not 100% sure
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post #8 of 10 Old 02-02-2013, 03:35 AM
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It's plasma, so you'll get different results by using different patterns.
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post #9 of 10 Old 02-02-2013, 05:01 AM
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Quote:
Originally Posted by fallengt View Post

It's plasma, so you'll get different results by using different patterns.

+1

Eye is the final judge!

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Calibration Management Disc
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post #10 of 10 Old 02-02-2013, 10:15 AM
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+1.

Most LGs have two ISF modes. I would calibrate one using the GCD windows and one using the AVS windows and compare them. Visually speaking, they will probably look very similar.
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