what does this color signify?

Discussion in 'Off-Topic' started by Lightfire, Jan 25, 2012.

  1. Lightfire

    Thread Starter Well-Known Member

    Oct 5, 2010
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    what does this color signify/say?

    this is the no signal image, i think.
    [​IMG]
    thnx
     
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    That looks like a test signal for a TV.
     
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  3. Lightfire

    Thread Starter Well-Known Member

    Oct 5, 2010
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    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
     
  4. maxpower097

    Well-Known Member

    Feb 20, 2009
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    Testing signal for 4:3 video. They have much more complex ones too.
     
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  5. magnet18

    Senior Member

    Dec 22, 2010
    1,232
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    you know, I've only ever seen that on a tv once
    satellite is nice :)
     
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  6. Lightfire

    Thread Starter Well-Known Member

    Oct 5, 2010
    690
    21
    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
     
  7. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    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.

    [​IMG]

    [​IMG]

    Here is the HDTV Test screen:

    [​IMG]
     
    Last edited: Jan 26, 2012
    maxpower097 likes this.
  8. Lightfire

    Thread Starter Well-Known Member

    Oct 5, 2010
    690
    21
    thatoneguy, thnx.

    what is ctr days? control days? thnx

    thnx
     
  9. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    CRT, not CTR. He means the Cathode Ray Tube TV sets, the old big ones, not the new flat ones.
     
  10. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    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).

    [​IMG]
     
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  11. debe

    Well-Known Member

    Sep 21, 2010
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    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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  12. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    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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