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posted by chromas on Thursday June 27 2019, @12:50AM   Printer-friendly

VESA Announces DisplayPort 2.0 Standard: Bandwidth For 8K Monitors & Beyond

While display interface standards are slow to move, at the same time their movement is inexorable: monitor resolutions continue to increase, as do refresh rates and color depths, requiring more and more bandwidth to carry signals for the next generation of monitors. Keeping pace with the demand for bandwidth, the DisplayPort standard, the cornerstone of PC display standards, has now been through several revisions since it was first launched over a decade ago. And now this morning the standard is taking its biggest leap yet with the release of the DisplayPort 2.0 specification. Set to offer nearly triple the available bandwidth of DisplayPort 1.4, the new revision of DisplayPort is almost moving a number of previously optional features into the core standard, creating what's in many ways a new baseline for the interface.

The big news here, of course, is raw bandwidth. The current versions of DisplayPort – 1.3 & 1.4 – offer up to 32.4 Gbps of bandwidth – or 25.9 Gbps after overhead – which is enough for a standard 16.7 million color (24-bit) monitor at up to 120Hz, or up to 98Hz for 1 billion+ (30-bit) monitors. This is a lot of bandwidth, but it still isn't enough for the coming generation of monitors, including the likes of Apple's new 6K Pro Display XDR monitor, and of course, 8K monitors. As a result, the need for more display interface bandwidth continues to grow, with these next-generation monitors set to be the tipping point. And all of this is something that the rival HDMI Forum has already prepared for with their own HDMI 2.1 standard.

DisplayPort 2.0, in turn, is shooting for 8K and above. Introducing not just one but a few different bitrate modes, the fastest mode in DisplayPort 2.0 will top out at 80 Gbps of raw bandwidth, about 2.5 times that of DisplayPort 1.3/1.4. Layered on that, DisplayPort 2.0 also introduces a more efficient coding scheme, resulting in much less coding overhead. As a result, the effective bandwidth of the new standard will peak at 77.4 Gbps, with at 2.98x the bandwidth of the previous standard is just a hair under a full trebling of available bandwidth.

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  • (Score: 4, Informative) by takyon on Thursday June 27 2019, @01:36PM

    by takyon (881) <{takyon} {at} {soylentnews.org}> on Thursday June 27 2019, @01:36PM (#860495) Journal

    My sources say that 16K [soylentnews.org] (in the display and field of view) at 1000 Hz (or more) [blurbusters.com] is desireable for VR, where you're looking at a very close up screen through lenses. And you could easily see a graphics professional wanting 8K, or 10-12K to display an 8K image with stuff around it.

    The debate is not settled by a stackoverflow poster. The case has been made for much higher resolutions, and you might want to reach the "resolution of the eye" at a certain distance and then make an increase over that.

    http://www.clarkvision.com/articles/eye-resolution.html [clarkvision.com]

    Does this mean that everyone needs to run out and buy an 8K monitor? No. I've been just fine with 720p video most of the time. But DisplayPort 2.0 allows you to run triple-4K setups at high framerates and greater color depths with no compression. IIRC, someone around here is using a setup with 6 monitors.

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