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DisplayPort 1.2 to carry 3D, mini port

updated 09:35 am EST, Tue January 13, 2009

DisplayPort 1 2 Spec

Display standards group VESA has revealed early details of DisplayPort 1.2, the next generation of its interface for computer screens. The technology doubles the amount of available bandwidth and lets the format produce images better than either the current 1.1 standard or dual-link DVI. At a minimum, the technology would allow a near-4K resolution of 3840x2160 at 60 frames per second and more advanced 30-bit color; the current specification is limited to 2560x1600 at the same quality.

The advancement will also allow the extra bandwidth to be used for either a faster image or multiple images. It could be used for 120 frames per second images at 1080p and reduce the loss of detail in fast movement, similar to modern 120Hz HDTVs; that same speed could also be used to maintain two separate images in a stereoscopic 3D effect for displays like the ViewSonic FuHzion and NVIDIA's matching GeForce 3D Vision glasses. In 2D, the bandwidth could be split into daisy-chained displays and include as many as four 1920x1200 screens or two 2560x1600 examples.

Version 1.2 should also make DisplayPort more practical for notebooks and is expected to use Apple's Mini DisplayPort as the official standard, shrinking the connector to provide more space. The output format is already being made available by Apple under a free license but would now be officially encouraged for use by the VESA group.

Confirmation of Apple's participation and the full standard's specifications should be published in mid-2009; devices using 1.2 should be available shortly afterwards.

by MacNN Staff



  1. Coruscant

    Joined: Dec 1969


    120 Hz

    Displays capable of 120 Hz (or 240 Hz) don't necessarily display additional frames video. The increased "refresh" rates were introduced to mitigate the lag in pixel response. While there are some manufacturers that do repeat frames with the higher refresh rates, these still do not provide "new" data to the screen. Typical video rates are still 24/30/60 with variations of interlaced and progressive fields. All this to say higher refresh rates and improvement of detail in fast movement scenes are not necessarily correlated.

  1. Hobeaux

    Joined: Dec 1969


    proof is in the seeing

    If you can find such a thing, look for demos of side-scrolling text on various HDTV sets and you'll notice that the sets running at 120 Hz are much easier to follow than those at 60 Hz. It was such an improvement that I vowed that my next HDTV will be 120 Hz or better.

    I haven't had the opportunity to view a 240 Hz HDTV (yet) but imagine that, despite diminishing returns on higher refresh rates, it would be an improved viewing experience.

  1. testudo

    Joined: Dec 1969



    Version 1.2 should also make DisplayPort more practical for notebooks

    Why? What about 1.2 makes it better for notebooks than the current standards? One would think it might make it better for desktops, because it could support higher output ranges one might see using a high-end video card...

    and is expected to use Apple's Mini DisplayPort as the official standard, shrinking the connector to provide more space.

    Well, that might be the reason, but the wording doesn't imply this.

    Then again, why would the DisplayPort folks change the official standard port, as either port is already 'standard' as it is. This would only make for incompatibilities.

    Plus, on top of that, it would basically force anyone wanting to make 1.2 standard stuff to go through Apple for approval and testing (so the licensing is free, but what of the testing?).

    And while Apple is offering a free license, they also keep the right to withhold or withdraw said license, which would seem to give one company the ability to restrict the standard.

  1. MhzDoesMatter

    Joined: Dec 1969



    welcome to business testudo. it aint pretty, but it is what it is.

  1. petsounds

    Joined: Dec 1969


    re: tetsudo

    Apple has no business reason to withhold or withdraw the license. They certainly haven't done so with the other standards they've helped usher in.

    Your concern about which standard is "the standard" is legitimate, but this is the fault of the DisplayPort folks for not mandating a change to Apple's design, but instead only "encouraging" its use.

  1. Guest

    Joined: Dec 1969


    re: testudo

    the current "Mini DisplayPort" apple uses is not part of the standard, however it will be in 1.2, hence "better for notebooks".

    As for the licence, the Apple Licence expires when Mini DisplayPort is made part of the DisplayPort standard.

    the question i have is this:

    Apple created Mini DisplayPort and implemented it, now we find out its going to be part of the 1.2 standard which also doubles the bandwidth. does that mean that a firmware/driver update for apple's shipping machines with Mini DisplayPort will bring them up to 1.2 (i.e. make use of double the bandwidth) or are they stuck in a limbo of 1.2 hardware with 1.1 functionality?

  1. shawnde

    Joined: Dec 1969



    Well from the numbers above, it seems that DisplayPort is still only as good as Dual-link DVI, because currently Dual-link DVI can support two 30" Cinema displays, which means 2x2560x1600 = 8.2 Megapixels. However DisplayPort 1.2 will support a total of 3840x2160 = 8.3 Megapixels.

    To me that seems like a very marginal difference for a technology which is not even here yet, and has a whole lot of hype, and too much DRM. No, Thank You. Please take your DRM and stuff it. I'll take Dual-link DVI over DisplayPort any day.

    By the way, the conclusion is that, today's DisplayPort 1.1 has HALF the bandwidth of Dual-link DVI, plus DRM. I wonder how much of the bandwidth is used for DRM?

  1. facebook_Catalin

    Via Facebook

    Joined: Feb 2010


    comment title

    Here are the improvements for Display Port 1.2:

    - better refresh rates
    - multiple display
    - improved 3D stereo transmission formats
    - up to 240 fps

    Here is an interview where Displayport technology is being compared with other standards in the industry:

    Professional Streaming Consultant

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