Slashdot Mirror


Apple's Mini DisplayPort Officially Adopted By VESA

DJRumpy writes "The Video Electronics Standard Association officially issued its Mini DisplayPort standard Tuesday, based on the technology licensed from Apple. VESA said that all devices using the Mini DisplayPort connector must meet the specifications required by the DisplayPort 1.1a standard, and cables that support the standard must also meet specific electrical specifications. It's a formal confirmation of the news from earlier this year, when VESA announced the Mini DisplayPort connector would be included in the forthcoming DisplayPort 1.2 specification."

13 of 160 comments (clear)

  1. HDMI? by ramk13 · · Score: 4, Interesting

    What happened to HDMI? Lots of monitors and computers already have it, it supports audio over the connection (Mini-DP doesn't), and it can support the resolutions the article mentions. There's even already a mini version of it in use. It's a standard in home video and had plenty of adoption with computers. Is there something that Mini-DP does that HDMI doesn't?

    1. Re:HDMI? by Microlith · · Score: 5, Insightful

      IIRC, HDMI's signaling is basically a single DVI link, and isn't rated to push anything past 1920x1200. Pretty much anything higher requires a dual-link DVI connection, which involves more complex cabling and signal routing on the board.

      DisplayPort is a much smaller connector and has an overall smaller PCB footprint, as well as using a thinner cable. I suspect that if Intel doesn't manage to run it by the wayside in a year's time with Lights Peak, you -might- see video cards with combination Mini DisplayPort + HDMI outputs.

    2. Re:HDMI? by dangitman · · Score: 5, Informative

      Multi-channel support. With DisplayPort, you can daisy-chain multiple displays on the one bus. It can also be used to transmit data signals of various types (which HDMI can do, but in a much more limited fashion). And the DisplayPort connectors are much better than the HDMI ones. It's just a thoroughly more modern standard.

      --
      ... and then they built the supercollider.
    3. Re:HDMI? by u0berdev · · Score: 4, Informative

      ...it supports audio over the connection (Mini-DP doesn't)...

      Actually the DisplayPort (and now Mini DisplayPort) standard DOES support audio, it's simply that Apple's DisplayPort offerings are not taking advantage of it.

      http://en.wikipedia.org/wiki/DisplayPort

    4. Re:HDMI? by hattig · · Score: 4, Informative

      Audio is an optional component in mini-DisplayPort.

      I presume that supporting audio would be done in the display output controller, so within the graphical portion of the computer (integrated within the 9400M, or discrete GPU). Maybe NVIDIA products don't support audio over DP themselves, or more likely Apple hasn't done the drivers to copy audio to the GPU from the audio controller for output via DP?

    5. Re:HDMI? by jfengel · · Score: 4, Informative

      HDMI's signaling is basically a single DVI link, and isn't rated to push anything past 1920x1200

      And just to complete the thought: the Mini DiplayPort goes to 2560x1600 and goes up to 8.64 Gbits/second. That's about twice as fast as the HDMI 1.2.

      HDMI 1.3 is actually comparable to Mini DisplayPort, with very similar specifications in terms of bandwidth.

    6. Re:HDMI? by LoRdTAW · · Score: 5, Informative

      HDMI is basically a single link DVI signal along with a digital audio stream. Both the audio and video gets their own pins and wires. But display port is a packet based system so audo, video and other signals can be multiplexed across the same set of wires. Display port 1.1 allows for eight 24 bit 192kHz digital audio channels. There can be 1, 2 or 4 digital lanes, similar to how PCI express works, more lanes = more bandwidth. The maximum bandwidth is over 8Gbps (3 meter cable limit)and there is also a 1mbps aux channel. A single display port cable can deliver a 2560x1600 60 Hz 30 bpp video signal. Dual link DVI port can do the same but it cant scale as well as display port will.

      The HDMI connector is mechanically flimsy and can be easily damaged by the heavy shielded cables that hang from them of if yanked on. Display port is designed for those heavy cables and resists tugging and pulling that would otherwise damage an HDMI connector. Its also screw-less connector so no more fiddling with thumb screws.

  2. Re:I hope it catches on by jfim · · Score: 4, Insightful

    Agree fully. I still drop my jaw everytime I see a laptop from the past 3-4 years still sporting a friggin' VGA connector, or even worse, from some "PC" manufacturers, a parallel port.

    Sadly, there will always be that crowd of conservative oddballs and anal retentives, barking like old dogs refusing to learn how to sit, for keeping old standards, trying to justify it by reasons of pointless, smelly compatibility that is long past its expiry date.....and everyone knows they are the ones who contribute to nothing but stagnation, not the ones who help driving the world forward.

    Yeah, just like people using serial ports to program Cisco gear or people in EE using serial ports to program microcontrollers by plugging the RX and TX pins directly to a serial port. And what about those people presenting their research at conferences around the world wanting to use a display connector that's supported on every single projector around the world in all convention centres instead of carrying a suitcase of adapters. We all know those aren't the people who help drive the world forwards, right?

  3. Re:I hope it catches on by Captain+Spam · · Score: 5, Funny

    DVI connectors are clunky and have that 18th century finger destroying screw-on mechanism. Anything with screws on computers should be abolished for good.

    Typical response from you so-called "computer user" kids these days. Back in my day, everything had screws! From the case to the cards to the plugs and sometimes the boxes everything came in! And our fingers were perfectly good enough for the job! Even the ones that weren't thumbscrews! Any one of the old-timers could grind your mabmly-pambly little soft, precious, pampered thumbs to dust, bones and all, with nothing but our bare fingers, and we wouldn't even flinch!

    Now get off my lawn! Durn whippersnappers...

    --
    Demanding constant attention will only lead to attention.
  4. Re:I hope it catches on by 93+Escort+Wagon · · Score: 4, Informative

    What's wrong with having a VGA output? Many older projectors and monitors, which are still perfectly functional and don't need to be replaced, use VGA. Why force people to buy a new monitor and a new projector just because they got a new laptop/PC?

    Let me introduce you to a new concept - an adapter cable. They cost 20 or 30 bucks at most, and are available for older display technologies and with either male or female style vga/dvi/whatever connectors.

    --
    #DeleteChrome
  5. Re:I hope it catches on by dangitman · · Score: 4, Insightful

    Why force people to buy a new monitor and a new projector just because they got a new laptop/PC?

    What? There's no need to buy a new monitor or projector. DVI/DisplayPort will drive a VGA device without any problems at all. But the reverse is not true. It really is bizarre that they still make laptops with just VGA output, when the digital alternatives offer VGA and more, with smaller connectors.

    --
    ... and then they built the supercollider.
  6. Re:I hope it catches on by wfolta · · Score: 4, Insightful

    The idea is that the new standard goes on the laptop, and from that nicely small connector, you can adapt to any standard, including new ones with much higher capacity.

    Want a VGA adapter? Done. Want ah DVI adapter? Done. Each $30 at the Apple Store, and soon probably cheaper elsewhere. Other adapters possible. More capacity in the standard, for other folks who want to hook up to something else. Small connection to help keep your laptop small.

    The only reason you actually need an ungainly VGA connector on your laptop is if you either refuse to pay $30 for an adapter, or you expect that you might lose the adapter yet still have your laptop for that super-important presentation.

  7. Re:I hope it catches on by wfolta · · Score: 4, Insightful

    Sure. The 95% of the time that I carry my laptop for my own use only, I have a slimmer machine that I throw in my backpack. That's convenient.

    When I might make a presentation, I can throw in a small cable and I have full-sized VGA. Another small cable gives me full-sized DVI. Other cables will come that provide other standards/sizes.

    When I'm going to a conference where I will make a presentation, I'll have my big laptop bag with all of those connectors, and I'll have a USB stick with my presentations on it, and a DVD, too, burned in PDF as a lowest-common-denominator.

    Lugging around a laptop with a VGA (which size) port and also a DVI (which size) port on it all the time is inconvenient.