13 responses

  1. Richard
    September 23, 2010

    Nice job of explaining. Not too technical, easy to understand. Good summary.


  2. Justin
    December 4, 2010

    Nice explanation…very informative and easy to understand!


  3. ungka
    January 17, 2011

    Well written article.
    i’ve read on about.com and wiki.
    found that this article summarize all the info and provide the necessary understanding.

    it’s sufficient enough to know the differencess between 1.3 and 1.4
    this is very helpful

    good work.


  4. Magnus
    May 2, 2011

    Im still confused.
    How can a v1.4 cable have different physical channels, there is still only 19 pins?
    I also have seen in other places that the ARC is present in 1.3 too.
    Is it really another physical cabling in a V1.4 cable vs a V1.3?
    Isnt it only more demand for bandwitdth to handle the ethernet traffic without disturbances?


  5. Magnus
    May 2, 2011

    And when it comes to the
    , here; http://en.wikipedia.org/wiki/HDMI, its written that the Maximum total TMDS throughput (Gbit/s) including 8b/10b overhead, is 10.2 Gb/s for both v1.3 and v1.4.
    This leads me to beleive that the cables are identical with onle the possibilty that there would be another physical channel for ARC and Ethernet, but this is not the case….Still 19 pins…


  6. Anthony
    May 23, 2011

    Can people tell it a HDMI1.3 or HDMI1.4 cable from its appreance?
    I heard some manufacturers they do the HDMI1.4 testing in QC. Sell it as HDMI1.4 if passed, and sell as HDMI1.3 if not passed. Is it ture?


  7. Wayne H
    August 11, 2011

    Whilst there may be 19 pins in both versions, there may not necessarily be 19 wires in both (or either, as a future version may eventually use all all 19 perhaps)… I haven’t researched it to know, but I dare say the 1.4 has a couple more wires pin-connected for its increased functionality.

    No doubt someone on here will enlighten us.


  8. Jon
    October 29, 2011

    Pinouts are the same in both version but that doesn’t mean they are the same if you take wire and fabricate your own hdmi cord(assuming you are talented enough) you would be under the A version release (A is not good considering hdmi is at D). Could have a controller chip imbedded. Computers are not the only thing that need code to work, revisions can be both mecha and ware oriented. Reminds me of the time apple took all the ground pins out of IBM serial cable and called it revised when it worked half as good. Fail


  9. Tiho
    August 11, 2012

    Nice post. Thanks for taking time to explain.


  10. David
    December 19, 2012

    If the purpose of an HDMI cable transmits coded data ( 1’s & 0’s ) digital format, then also the same data ( 1’s & 0’s ) from being transferred using a hard drive in a computer ( SATA Cable ). My understanding is that the IC’s used to code and decode HDMI data, have different pinouts from the IC then in turn to the connector. But the cables used to connect the 2 devices are the same. 19 Pins. If you have two HDMI 1.4 devices, then it will automatically designate which pins are used for what. I have been using an 1.3 Cable in 1.4 devices. Works flawless. Just my 2 cents. David L.


  11. Magnus
    December 22, 2012

    Still nobody physically took the cables apart and looked inside for differences?


  12. Jason
    January 28, 2013

    It seems that pin #14 & #19 is where the 1.4 Ethernet is added. In previous versions they were unused, reserved, or the additional throughput was added in 1.4.

    But I still don’t know if you can tell a 1.3 cable from a 1.4 cable by looking at it.


    • Magnus
      February 4, 2013

      OK, thanks for that info at least.
      If the ethernet where added in one or 2 previous unused pins, it should be possible to use a simple multimeter to be able to tell if its a 1.3 or 1.4 then.


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