DisplayPort 1.4 to Use 'Lossless' Compression for Higher-Quality 8K Video Over USB-C

Discussion in 'MacRumors.com News Discussion' started by MacRumors, Mar 2, 2016.

  1. MacRumors macrumors bot


    Apr 12, 2001

    The Video Electronics Standards Association yesterday formally announced its new DisplayPort 1.4 standard, setting the stage for improved video quality and color for external display connections over both DisplayPort and USB-C connectors.


    Rather than an increase in actual bandwidth, the improvements in DisplayPort 1.4 come due to improved compression, taking advantage of VESA's new Display Stream Compression 1.2 standard to support High Dynamic Range (HDR) video up to either 8K resolution at 60 Hz or 4K resolution at 120 Hz.

    In addition to video-related improvements, DisplayPort 1.4 also expands audio capabilities with support for 32 channels, 1536kHz sample rates, and broader support for "all known" audio formats.

    The approval of DisplayPort 1.4 comes even though consumers are still awaiting the arrival of devices supporting the previous DisplayPort 1.3 standard. Intel had been expected to support DisplayPort 1.3 in its current Skylake generation of chips, but the company instead opted to offer dual DisplayPort 1.2 support. As we detailed earlier this year, the lack of DisplayPort 1.3 support in Skylake could lead Apple to hold off on releasing a new 5K Thunderbolt Display until next year when chips supporting the standard become available.

    Intel hasn't laid out its DisplayPort support plans beyond Skylake, so it's unknown whether the company will first move to DisplayPort 1.3 or if it can jump straight to the new DisplayPort 1.4 standard. Either way, we're unlikely to see Macs supporting DisplayPort 1.4 until 2017 at the earliest.

    Article Link: DisplayPort 1.4 to Use 'Lossless' Compression for Higher-Quality 8K Video Over USB-C
  2. Michaelgtrusa macrumors 604

    Oct 13, 2008
  3. Crosscreek macrumors 68030


    Nov 19, 2013
    May have to hold off on my Mac purchase for another year.
  4. jonnysods macrumors 603


    Sep 20, 2006
    There & Back Again
  5. JonneyGee, Mar 2, 2016
    Last edited: Mar 2, 2016

    JonneyGee macrumors 6502


    Jun 8, 2011
    Nashville, TN
    Knowing Intel, we might see 1.4 sometime around 2025. :rolleyes:
  6. JPLC macrumors 6502

    Dec 20, 2011
    Sounds like it would be great to have USB-C for the iPhone and iPod Touch. Why not go all the way with USB-C for the whole product range and make it a standard? And please don't tell me they cant because the iPhone needs to be thinner...
  7. H2SO4 macrumors 601

    Nov 4, 2008
    Get rid of that crappy proprietary Lightning and go USB! If you have to use an adaptor lets make it one that converts from USB on the device to lightning on obscure devices.
  8. pat500000 Suspended


    Jun 3, 2015
    Somebody needs to whip intel's behind to hurry things up... Like whipping snow dogs to hurry it up.. Mush mush!
  9. PatriotInvasion macrumors 68000


    Jul 18, 2010
    Boston, MA
    Officially holding out my next purchase for a newly designed MacBook Pro that can drive a standalone 5K Retina Thunderbolt Display.

    However, assuming there will be a new case design for the 5K iMac this fall (4 years since it was last redesigned, and 7 years of the same 16:9 front face look and feel), I may not be able to resist and would get that and continue using an iPad as my portable machine (even though it lacks the ability to do some of things I prefer doing on the Mac). First world problems to the fullest.
  10. WestonHarvey1 macrumors 68020

    Jan 9, 2007
    Why is lossless in scare quotes? Is it not actually lossless?

    Maybe not... they said "visually" lossless.
  11. ReneR macrumors 6502

    Jun 18, 2008
    Berlin, Germany
    Yay - the more vendor-neutral universal connection standard stuff the better!
  12. td2243 macrumors 6502

    Mar 14, 2013
    Santa Fe, NM

    Compression is never lossless. It may be imperceptible to the ear or eye, but it is still compressed at some level.
  13. Canubis macrumors regular


    Oct 22, 2008
    Vienna, Austria
    Excuse me, but this is complete nonsense. Indeed there is true lossless compression (though I cannot say for sure that "lossless" in this article truly means lossless). Just think about zip compression, you compress a text file by zipping it and get the exact same file with all data back when unzipping it. That's exactly what happens also with audio or video, when talking about lossless compression, though algorithms may differ.
  14. oneMadRssn, Mar 2, 2016
    Last edited: Mar 2, 2016

    oneMadRssn macrumors 601


    Sep 8, 2011
    New England
    That's not true at all. There is plenty of compression that is lossless.
    --- Post Merged, Mar 2, 2016 ---
    This is why I think it is wise to hold off on investing in major 4k hardware for now. The standard is totally in flux. Why pay $1000+ now for a 4k TV that uses HDMI 1.4 or 2.0, when there are other HDR and 8k standards right on the horizon? It looks about as silly as buying a 720i TV with only components inputs in 2003, when HDMI and 1080p was right on the horizon.
  15. cube macrumors P6

    May 10, 2004
    Good. Then I will have a 40-48" 3D 8K HDR smart retina "monitor".

    Hopefully FreeSync too (TVs also need it).

    And 4 input ports is not enough.

    And I've had it with the snooping, EULAs, and subpar usability.
  16. pat500000 Suspended


    Jun 3, 2015
    Really? So you are not in hurry right?
  17. iAK macrumors member


    Jun 13, 2011
  18. manu chao macrumors 603

    Jul 30, 2003
    And compressing a file in the form of a ZIP 'archive' is also never lossless. If you zip a text file, the text will be shortened by slight rephrasing and the use of shorter words. This may be imperceptible to the reader but it is still compressed at some level.
  19. theluggage macrumors 68040

    Jul 29, 2011
    No - there are plenty of lossless compression algorithms. E.g. LZW compression used by GIF, some types of TIFF and ".zip" files (using lossy compression on executables and data files is not a good idea), Apple Lossless audio, FLAC audio, .png files...

    Lossless compression works by finding a more efficient way to pack the data. E.g. replacing frequently occurring patterns with short codes or 'run length encoding' (e.g. if there is a row of 1000 white pixels just send 'white' and '1000'). Morse code is another example (frequently occurring letters are given the shortest code rather than ASCII which uses 8 bits for every single character - Huffman encoding is the algorithmic equivalent).

    With lossless compression, you get back exactly what you put in. You don't get the sort of 100x compression you see with lossy compression, but 2-3x is feasible.

    However, "visually lossless" is either a redundancy (if its lossless, of course there's no visual difference) or weasel words.
  20. surfingarbo macrumors regular


    Jun 12, 2011
    Calgary, AB, Canada
    They can't because iPhone needs to be thinner.

  21. blacktape242 macrumors 68000


    Dec 17, 2010
    Sacramento, CA
  22. name99 macrumors 6502a

    Jun 21, 2004
    Jesus. Never in my life would I have believed this is how people actually think.
    Dude, I don't want to mock you but you are so wrong, so UTTERLY ignorant about this subject, it's not funny.

    Let me simply point out that LOSSLESS compression is a well-defined mathematical field, it is built upon probability theory, like all CS it consists of theorems and algorithms, and it applies to all random processes (think "data streams") regardless of whether they are text, video, sensor data, or anything else.
    It has NOTHING to do with "rephrasing" and use of "shorter words". Your comment is the sort of thing I'd expect EE's to send each other on April Fools' day as a joke.
  23. doelcm82 macrumors 68040


    Feb 11, 2012
    Florida, USA
    The benefit to buying now is that you get to use it now.

    I have a MacBook Pro (Retina, 13-inch, Mid 2014). It has the power to drive the cheap 4K TV I got at Sam's Club. I'm a lot more productive when I can keep several windows open and visible at the same time. (How did I ever work in VGA resolution?)
  24. shareef777 Suspended


    Jul 26, 2005
    Chicago, IL
    Great, another reason for Apple to further delay the new rMBP! /s
  25. lssmit02 macrumors 6502

    Mar 25, 2004
    I think you missed the joke.

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