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Thread: EDID for 1080p 50Hz

  1. #1

    EDID for 1080p 50Hz

    last week we were doing some EDID capture
    and we noticed that the default Parrot 1080p50 EDID was wrong-
    or rather it was different from image pros, matrix pros-

    Parrot EDID timing was a 141.50MHz clock 2544x1144
    screen refresh is 49.929Hz
    photo-26.JPG

    Image Pro/Matrix pro 148.50Mhz clock 2640x1125
    screen refresh 50.000Hz
    image-7.jpg

    49.929 is nowhere near 50.000

    smpte timings from this page show image pro correct

    http://www.oocities.org/yehcheang/SMPTE_274_295.html
    Scanning System Parameters for SMPTE-274M & SMPTE-295M.pdf

    any comments?

  2. #2
    Join Date
    Oct 2004
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    you might end up with different results depending upon the timing table
    There are a few different timing tables used to generate the EDID settings:
    GTF / CVT / SMPTE

    Take a look in a Datapath X4 output timing page, or Lightware matrix advance EDID editor…
    or Google 'edid timing tables'
    see page 76 of the following publication:
    ftp://ftp.cis.nctu.edu.tw/pub/csie/S.../EEDIDrAr2.pdf
    and
    http://www.vesa.org/vesa-standards/standards-faq/


    ...Dont get me started about CEA extensions HDMI and new MacPros!

    S
    Simon Pugsley

    SNP Productions Ltd. (UK)
    Lighting & Video Control Solutions
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  3. #3
    Quote Originally Posted by Mr_P View Post
    you might end up with different results depending upon the timing table
    There are a few different timing tables used to generate the EDID settings:

    S
    the issue is the refresh rate timing - not the specific "GTF / CVT / SMPTE"

    49.929HZ is not 50.000Hz - in a 25Hz/50Hz system
    if you are mixing parrots cameras matrixes -
    and parrots are giving you the wrong timing - default parrot settings need changing….

    if you use a 49.929Hz refresh you will get glitching with almost every other type of video equipment

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