what does this color signify?

Thread Starter

Lightfire

Joined Oct 5, 2010
690
Ahhh,

that's why most of time i turn on a tv, i always see that. i mean if there are only a minutes before the v starts.

they may be testing. xD

thnx
 

Thread Starter

Lightfire

Joined Oct 5, 2010
690
Hi magnet18, finally you replied to my thread. Again. xD

Thanks.... um, meaning every aspect ratio has their own image testing signal?


um, magnet18, satellite, i want one could you send me one here in Ph. xDDDDDDD

thnx
 

thatoneguy

Joined Feb 19, 2009
6,359
It is showing all primary colors and all secondary colors, alternating, so that in CRT days, you could adjust the Red, Green and Blue to match the reference card.

The newer HDTV test is similar, but has a grey gradient (Black to white) along the bottom and some other HD specific marks.





Here is the HDTV Test screen:

 

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thatoneguy

Joined Feb 19, 2009
6,359
thatoneguy, thnx.

what is ctr days? control days? thnx

thnx
As Georacer stated, Cathode Ray Tubes, the TV's and Displays that weigh 30 pounds or more, they may still be the standard in parts of the world.

If your computer monitor is set up correctly, you should see several shades of black at the lower right part of the HDTV screenshot above, as well as in the NTSC lower right corner, the NTSC are a little brighter so they are easier to pick out. So look at the NTSC Dark level adjustments to get an idea of where they are at, then compare them to the HDTV. You not only get more colors with HDTV, but more bandwidth between the brightest part on the display and the darkest part (high contrast ratio).

Prior to color TV, in the Black and White TV (greyscale, actually), they used the "Indian Head" to tune sets for best sharpness edge to edge (Attached).

 

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debe

Joined Sep 21, 2010
1,158
A bit more on Test Patterns. The last coloured one iv burnt onto a DVD for testing DVD players & monitors. The picture was taken with a camera on an LCD tv. This is a PAL system.
 

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thatoneguy

Joined Feb 19, 2009
6,359
Thanks debe!

Now we know what all the test patterns look like, in a SINGLE thread!

This should almost go to radio and comms as a sticky, once the details on how to generate the signals are posted, such as the frequencies listed on yours, and the "black levels" to tune for on my NTSC. The HDTV one I don't have much data at all, other than "Make it look like this".
 
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