Is there a pattern to check/adjust decoder accuracy?

Colorbars...

And color scales should be needed as well (saturation is a function of the color decoders if i'm not mistaken), not sure if those are included in DVE though (never used it).

Not needed. Helpful and nice to have to see how much you're off, but colorbars tell you if things are right or not.

Not needed. Helpful and nice to have to see how much you're off, but colorbars tell you if things are right or not.

And what would one look for in the color bars? Just confirming what they think it should look like by eye? One of the colors in particular?

C.

And what would one look for in the color bars? Just confirming what they think it should look like by eye? One of the colors in particular?

C.
Pretty sure i asked this months ago, I couldn't understand jack of the answers I got (but maybe I got less stupid since then, yay).


On top of that I think my green filter might be busted since every TV I check is pushing green like crazy according to it, of course it could be the TVs being wrong...


Next time I visit my mom I'll check my filters against R G and B modes on her old CRT.


In the mean time and since I can't trust my TV's decoder I opted for running the PS3 on RGB mode.

And what would one look for in the color bars? Just confirming what they think it should look like by eye? One of the colors in particular?

C.

Generally you look through a blue filter to look at blue & white for color and cyan and magenta for tint. The idea is that you adjust the color and tint so that when you're looking through the filter they look similar. DVE also has a gray screen with some colored boxes that can be used the same way. It's probably explained better in http://www.ramelectronics.net/Video-calibration.ep

Generally you look through a blue filter to look at blue & white for color and cyan and magenta for tint. The idea is that you adjust the color and tint so that when you're looking through the filter they look similar. DVE also has a gray screen with some colored boxes that can be used the same way. It's probably explained better in http://www.ramelectronics.net/Video-calibration.ep

I'll check that article out for sure. I do understand the process of how to adjust color and tint using the color bars and a bliu filter. I have the THX glasses and the DVE filters and the Lee Filter 071 as well. They all get the same settings even though they all look slightly different.

In the DVE HD basics, I know he says to first dial in Blue color and tint and then check red and green for the decoder errors with the filters. I also know it said to expect decoder errors in the red channel specifically and that they are put there on purpose by most manufacturers. In my case the green looks almost right and the red primary is right on with the secondaries in the red channel being off and this error is commented on in the DVE HD basics discussion of color decoders.

I just thought there was a special or additional way of looking at the bars to determine Decoder errors beyond what I already knew. Based on the OP's question.

C.

Pretty sure i asked this months ago, I couldn't understand jack of the answers I got (but maybe I got less stupid since then, yay).


On top of that I think my green filter might be busted since every TV I check is pushing green like crazy according to it, of course it could be the TVs being wrong...


Next time I visit my mom I'll check my filters against R G and B modes on her old CRT.


In the mean time and since I can't trust my TV's decoder I opted for running the PS3 on RGB mode.

Not sure you want to use RGB mode on the PS3 if it has a setting to send YCBCR or whatever it's called. Or perhaps that is use limited instead of expanded? I don't own one.

Here is a good article on the subject.

http://www.audioholics.com/tweaks/calibrate-your-system/hdmi-black-levels-xvycc-rgb

C.

Yeah I keep it at limited RGB (the TV doesn't support extended RGB or YCBCR WTW) and verified that it behaves just as YCBCR for white and black levels (tweaking them in both modes makes white and black bars behave exactly the same).


On the other hand, I think the PS3 would be smart enough to correctly map 16-235 to full RGB levels when set at extended RGB, I know that the auto setting doesn't work most of the time (even paired with recent bravia TVs) so maybe that's why this setting has such a bad reputation, that and the lack of WTW.

And what would one look for in the color bars? Just confirming what they think it should look like by eye? One of the colors in particular?

C.

Check to make sure color decoding is correct for each color individually via single-color mode or filters.

Check to make sure color decoding is correct for each color individually via single-color mode or filters.

Gotcha.

I also found a really good description of what to do just last night in the AVS709 documentation which sent me to a document for AviaII documentation describing in more detail what you have just said.

I have come to accept that I have the typical color decoder errors talked about on DVE HD basics and within the AVS709 and Avia II socumentation and now I have to pick some compromises.

I also understand the OP's original question better now.

Avia had/has a color scale for testing your R, G and B Primaries with percentages for how closely you match the grey reference background (negatively or positively) when viewed through the Gels. So does AVS709. Using that screen on either product gives you a semi-rough estimate of "how much you are out per color once you have dialed in your blue channel up or down" from looking through the Lee Filters/Gels. DVE and Getgray don't have this sort of pattern and AVS709 and Avia do. Wether it is actually improtant or accurate in it's implementation or not is one thing. But the OP was probably wondering about it's absence on the DVE disk.

C.

Wether it is actually improtant or accurate in it's implementation or not is one thing. But the OP was probably wondering about it's absence on the DVE disk.

Oh it's accurate (for either 601 or 709 respectively), and useful to see how far off you are, but not necessary to see if you are off, or to align things. I actually prefer the flashing colorbars on Avia/AviaII for precision they help a great deal. I find it actually pretty difficult to be very precise on the color decoder test pattern with the gray background.