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posted by CoolHand on Wednesday November 29 2017, @08:48PM   Printer-friendly
from the top-interfacers dept.

The High-Definition Multimedia Interface 2.1 specification has been released. The total transmission bandwidth has been increased to 48 Gb/s from the 18 Gb/s of HDMI 2.0 (or a maximum data rate of 42.6̅ Gb/s from 14.4 Gb/s). The new data rate is effectively tripled to 128 Gb/s when using Display Stream Compression (DSC).

Using DSC, HDMI 2.1 cables can transmit 4K (3840×2160) @ 240 Hz, and 8K (7680×4320) as well as UW10K (10240×4320) at 120 Hz. Without DSC, you will be able to transmit 4K @ 120 Hz, 5K (5120×2880) @ 120 Hz, 8K @ 60 Hz, and UW10K @ 30 Hz. Keep in mind that color depth and chroma subsampling also affect the necessary data rate.

The specification also adds new features such as dynamic high-dynamic-range support (you read that right - the first "dynamic" refers to "dynamic metadata that allows for changes on a scene-by-scene or frame-by-frame basis"), Variable Refresh Rate, Quick Frame Transport, Quick Media Switching, and Auto Low-Latency Mode:

This new version of the HDMI specification also introduces an enhanced refresh rate that gamers will appreciate. VRR, or Variable Refresh Rate, reduces, or in some cases eliminates, lag for smoother gameplay, while Quick Frame Transport (QFT) reduces latency. Quick Media Switching, or QMS, reduces the amount of blank-screen wait time while switching media. HDMI 2.1 also includes Auto Low Latency Mode (ALLM), which automatically sets the ideal latency for the smoothest viewing experience.

Also at the HDMI Forum, AnandTech, Tom's Hardware, and The Verge.

Previously: HDMI 2.1 Announced


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  • (Score: 2) by DannyB on Thursday November 30 2017, @02:37PM (1 child)

    by DannyB (5839) Subscriber Badge on Thursday November 30 2017, @02:37PM (#603434) Journal

    It was meant to be Funny not Inciteful.

    I don't think tripping over cables will ever completely disappear. Which brings up another good reason to have locking connectors. When you trip over cables, and it does happen, even if less frequently; tripping over the cable has a non-zero probability of causing other equipment damage -- and thus additional sales. It's good for corporations. Therefore it is objectively good for everyone.

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    People today are educated enough to repeat what they are taught but not to question what they are taught.
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  • (Score: 0) by Anonymous Coward on Thursday November 30 2017, @05:24PM

    by Anonymous Coward on Thursday November 30 2017, @05:24PM (#603526)

    I bought a bunch of cheap magnetic breakaway cables off of Amazon. They are great for accidental trips, or being around the kids, or when I'm at work or home and need to leave for an appointment. Just close the lid and walk away an I don't have to suffer the fact that you cannot ever seem to plug USB in correct way the first or second time.