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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.
- Here is the HDMI Forum's PPT PDF explaining HDMI 2.1.
- Here are the data rates and cables required for various resolutions/bit depths/chroma. Resolutions requiring Display Stream Compression are indicated.
- Here is another table showing the various color depths and chroma subsampling levels.
Also at the HDMI Forum, AnandTech, Tom's Hardware, and The Verge.
Previously: HDMI 2.1 Announced
(Score: 1) by Ethanol-fueled on Wednesday November 29 2017, @11:05PM (3 children)
Why is that a big deal? Seriously, the mechanism of "locking connector" is obvious but why add the additional complexity?
Tripping over cables is a thing of the past unless you're white trash like me running extension cords and audio cables under your living room rug.
(Score: 0) by Anonymous Coward on Thursday November 30 2017, @04:49AM
I think you and others are missing the fact that comment was meant as a joke. Just look at the part about requiring people to buy adapters.
(Score: 2) by DannyB on Thursday November 30 2017, @02:37PM (1 child)
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.
The lower I set my standards the more accomplishments I have.
(Score: 0) by Anonymous Coward on Thursday November 30 2017, @05:24PM
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.