Screen choice is very important in a projector system. Room setup is also very important. They r using a stewart screen and the room is pitch black.

This post has been edited by anfieldude: Nov 22 2011, 01:27 PM

I'm not receptive to calibration software. In the end, does the technology really gives you what you need? Question: Do you know what you need? I believe in touch and feel method. This way, I can customized to any HT or hifi (for sound) setup. Remember, the results from device or software is just to tell you statistics. Learn to trust your eyes and ears. Opinions? Lets go

Not sure what you mean. Calibration software is something that tells you what the meter that you use read.

For HD content mastered for Blu Ray/Home Use, there are set black/white levels, white points and the Red/Green/Blue/Cyan/Magenta/Yellow points and levels that adheres to Rec709.

Also the issue with eyes is ur eyes can deceive you, that is why a meter like a spectroradiometer is necessary.

However, there is reference and preference. Its ur display, u can do whatever u want with it. No one can say otherwise.

If u want to bring ur display to as close to reference as possible (to view what the director used to master the film to) u would need to calibrate ur display.

Else, u can view ur movies any way u want, its entirely up to u.

Music is different. There are no real specs to adhere to. The people responsible for mixing the discs for home use have to assume how the listening environment shd be as there are no established specs.

Video content has well defined specs that allow the studios to master them for consistency.

Hi..I'm newbie here,,

Through page to page, I try check how the owner for TH-P50U30K calibrate their TV. Mind to share the calibration? I'm still not reach the break-in period. Just leave it as standard for everything. I wonder if I can calibrate it by myself becoz it's seem difficult for me understand all procedure and equipment needed.

Capoi, contact Anfieldude lor...What a difference he make on my 50inch..

Wow, first time I'm hearing someone say not receptive to software/tools for video calibration.

So if you just rely on touch and feel method, how do you know if the colours are accurate or not? Or if your color temp is spot on or not? Or basically you don't care about those issues and just go with what looks good to you?

Happy New Year to everyone!

Just a quick question, what should I look out when I am going after a SPL Meter?

Or any at reasonably price will be fine?

I believe this is the wrong thread but the galaxy cm-140 is pretty good

IIRC it's USD140 before ship. Anyone itchy to get one?

I will be adding to the 1st page with more details and if possible the basics of calibrating with a meter soon.

Cheers pal. I'll have a look

Hi Anfieldude

There's this discussion in AVS about Sharp's Elite not correct at <40% stimuli... what is stimuli? Is it the grey scale levels?
http://www.avsforum.com/avs-vb/showthread....21#post21472921

What is your opinion of Sharp Elite's calibration?

Stimuli is luminance or intensity/brightness level. Think of it like this, the greyscale is levels of white from 0% luminance to 100% luminance (at 5% or 10% intervals).

When we calibrate colour, we normally either calibrate at 75% luminance levels or 100% luminance levels. If the colour decoding is correct, it will be linear at all levels of luminance.

There are other sets that have this issue.

There can be 2 kinds of errors for colours, one is as described above (when u measure say cyan at 40% levels cyan shifts to blue instead of staying where it was when u measured at 75% levels) or the other error is luminance errors at different saturations of colour ( remember that colour is normally calibrated fully saturated). Will try to add some info on colour decoding errors in this thread.

There definately seems to be a colour decoding error on the Elites. There are also colour decoding errors in other sets, some subtle some clear. The calibrator needs to understand the error and minimize it (meaning deciding which is more serious and how u can compromise...)

Thx Anfieldude

I thought luma is calibrated spearately from chroma? I thought if grey scale is right ie luma, then calibration of chroma ie REC709 should be right at different stimuli?

I don't recall you did a calibration of colors based on different stimuli?

Yes I actually think there should be color mapping problem with Quattron RGBY when mapped to conventional RGB.

This post has been edited by specuvestor: Jan 18 2012, 04:11 PM

spec,

There is no control to calibrate that on the displays for different stimuli. The displays shd be linear and most of them are, but some are not. Some errors are more serious than others.

Colour is normally calibrated and checked at 75% and 100% intensity. However, unless there is a full 3D LUT there is no way to fix these kinds of inconsistencies in the colour.

As I said, there are otehr displays out there with colour decoder issues.

Anfi, should i have my PS51D6900 calibrated after breaking-in the plasma ?
IS it necessary at all to break-in my plasma as i heard from the samsung tech guy that breaking-in is unnecessary today's plasma.

Break in is a debated topic. The reason it came about is that when the phosphors are in the infancy stage, the sets show more IR and if the owner does not understand that the nature of phosphor based technology and leaves bright static images for long periods of time, it can result in burn in.

Its entirely up to u. Just remember to vary ur content for the 1st 20hrs or so of ur display and try not to have bright static images. Keep ur brightness and contrast low during the early life of ur plasma if u decide not to break in ur display. Just be cautious. The newer sets do show more resilience anyway.

The Samsung has excellent controls to dial in ur set to close to the Rec709/NTSC/PAL colour spaces, however, deciding if u want it calibrated, is entirely up to u. Read the 1st few slides on why calibrate is necessary and u can decide.

OIC... so it is pretty much unfeatable problem.

Just curious: then how does a calibrator know this color mapping problem exist if you just check against 75% and 100% stimuli?

What other displays have this problem? This is the first time I've actually heard of this because like I said, I always assume if grey scale is right, then colors at different stimuli should be right.

Thanks much!

The calibrator either has connections with the relevant calibration communities (ie ISF/THX) who highlight issues they see or finds them out himself when he calibrates the display for the 1st time. Thats why it takes more time when a calibrator is working on that particular model for the 1st time.

As I said, there are different types of colour decoder errors. Some are luminance shifts at different saturations, some are hue shifts during different saturations/luminance. On some occasions, a particular setting or value can make it worse. Some times calibrators have to make a choice if the error is livable and which is the lesser devil.

Colour decoding errors can also be in the form of decoding the encode using the wrong matrix. This was dominant in the Sigma Design chipset and some early Reon chipsets. The encode was for HD but due to a problem in the chipset it would decode unflagged HD content using the SD matrix.

Calibrators can also catch this by watching known material and as they spend more time with calibrated images can see these issues. If they are subtle, they let it go, but if its obvious and they cannot fix it they shd let the customer know.