Calibration/test signals

Discussion in 'TiVo Series3 HDTV DVRs' started by sharding, Sep 22, 2006.

  1. sharding

    sharding Member

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    For those of you who like to calibrate your displays, how are you doing it for the TiVo?

    It would be really great if it could generate some test signals internally (even just SMPTE color bars would be better than nothing). I'm sure I can find some broadcast color bars, but then I'm relying on that channel to be sending a perfectly calibrated signal (and the cable co. not to screw it up). Obviously there's enough variation between channels that no calibration will be perfect for all of them, but I'd prefer to calibrate to the theoretical perfect signal from the TiVo and see the true variations of the channels, rather than flying blind as I am now.
     
  2. vman41

    vman41 Omega Consumer

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    It's a shame TiVo didn't get some HD testpatterns (audio and video) as part of the THX certifcation deal.
     
  3. QVo

    QVo New Member

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    If you have Blockbuster Online or Netflix, I believe they stock the Monster and AVIA DVD's.
     
  4. sommerfeld

    sommerfeld Lucky (?) 200 member

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    Indeed. For extra credit it would be very clever to get something similar to the calibration menus you get on the DVD of The Incredibles.
     
  5. dt_dc

    dt_dc Mostly Harmless

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    You could use TivoToGoBack to transfer some calib ... oh, never mind.

    HDNet Test Patterns - Tue., Sep. 26th - 6:50 AM ET

    InHD used to have some calibration screens they'd broadcast early Saturday mornings ... but ... now I don't see them in any online guides. I think it was "Television Tune-Up" or something like that.
     
  6. sharding

    sharding Member

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    Thanks for the pointers. I don't have HDNet, so that doesn't help, but I'll keep watching INHD's guide for it.

    I have calibration DVDs now, but that calibrates to the output of my DVD player which kind of defeats the purpose. I want to calibrate the TiVo's input to the output of the TiVo, not the DVD player.
     
  7. dt_dc

    dt_dc Mostly Harmless

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    Note to Tivo: Some HD Calibration screens would make a pretty cool Showcase / TivoCast / whatever ...
     
  8. jodell

    jodell TiVo geek

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    Irvine, CA
    +1

    Jeff
     
  9. johnsom

    johnsom New Member

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    For those of use without HDNet, InHD has something labeled "Bars & Tone" at 4am on 10/3. Hopefully it's more than just color bars and tone....
     
  10. R. Kalia

    R. Kalia New Member

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    A calibration DVD calibrates the DVD + TV combination. Since the DVD player has its own brightness/contrast/color/tilt/etc settings, you can't calibrate a cable tv program by using a DVD calibration program.

    An internal TiVo calibration display won't do much either since it doesn't come from the program source you are interested in displaying properly (cable tv).

    The only way to calibrate the cable picture being received on a TiVo and displayed on your TV is to use a test pattern that is sent via a cable channel..

    Of course, if you use (say) an HDNet test pattern, HDnet may not have the same color balance or black level as ABC...
     
  11. cherry ghost

    cherry ghost Well-Known Member

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    Probably too late for most, but INHD has a TuneUp scheduled for 11/5 at 7:00 a.m. est. Also scheduled for 11/12 and 11/19.
     
  12. TerpBE

    TerpBE Go Terps!

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    For those searching on Tivo, it's called "INHD Tune Up"
     
  13. Sy-

    Sy- New Member

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    Ewa Beach,...
    Recoeded the INHD Test patterns on my S3. They are pretty skimpy. Only 4 calibration screens and one of those is a convergence patern only useful is you have an old style CRT rear projector. HDNet's Test patterns are showing early Sunday morning. I don't know if they will be any more useful but it's worth a look.

    Sun, Nov 12 - 6:50 AM ET HDNET
     
  14. moyekj

    moyekj Well-Known Member

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    Recorded it too and agree it was pretty skimpy for video calibration. For the contrast test I could never see the outermost darkest circle on my LCD no matter what contrast level I used - likely an indication of poor black levels for my LCD.

    The 5.1 audio section was certainly useful however at least for me.
     
  15. FlippedBit

    FlippedBit New Member

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    I recorded the INHD "Tune Up". Is this the same as the "Bars & Tone"? I just missed my chance to record it and don't see it on the schedule again.

    On the color/tint pattern, they say that it is best if you have a blue gel filter, which I have from my Avia Home Theater setup DVD. Then they go into detail about how to make adjustments if you don't have a blue gel filter. Unfortunately, they don't discus how to use the pattern with the filter. I did what I thought was what they expected but I didn't like the results. The brightness and contrast adjustments worked well though. Dissappointing to find out that 3% of my image is chopped off by my TV's overscan and that 10% grey is the same as black on my LCD flat panel (JVC 37X987).
     
  16. doctord

    doctord Member

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    Dec 17, 2004
    The "Bars & Tone" is just a test pattern. Don't waste disk space on it.

    I tried to use my blue filter on the "Tune Up" the same way I use it with the Video Essentials DVD. It pushed my color setting too high for my liking.
     
  17. dt_dc

    dt_dc Mostly Harmless

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  18. FlippedBit

    FlippedBit New Member

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    Same here.
     
  19. jlib

    jlib Lean Forward

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    That is strange because brightness is what would apply to black levels not contrast. I have not seen this test so maybe I am incorrectly imagining what it looks like. Do they list the percentages of black level on the circles? Was the outermost one 0% or some negative number. If negative don't worry too much because I have never seen an LCD that can do blacker than black. If it was 0% then isn't it still the case that you should not be able to discern it if it is your base black level?
     

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