Still trying to get used to HDMI 2.0a and the 4K HDR content that the standard makes possible? Brace yourself for a new wrinkle: The group behind the specification announced in late November that HDMI 2.1 is on its way. Many questions have arisen as a result of this announcement, including folks worried whether their new TV or 4K Blu-ray player is already out of date or concerned that they’ll soon need to purchase a bunch of new HDMI cables. Then there are the questions surrounding what HDMI 2.1 brings to home entertainment systems: What’s new, how does it work, and when is it coming?
We’ve got all the answers right here, and while the subject matter is a little technical, we’ve made every effort to break it down in a way that is meaningful to both the average Joe and the hardcore A/V enthusiast. Since there are some intensely burning questions at play, we’ll start by answering those we get asked the most often on various forums and social media.
It’s true that HDMI 2.1 opens up a wealth of new possibilities, which we’ll get into shortly, but we’re years from even our first glimpse of most of those potential features, and even then, it will be years more until specs like 8K resolution and 4K at 120Hz are anywhere close to mainstream.
Bottom line: If you bought your TV within the past couple of years, you’re good to go for a while. What if you’re on the verge of buying a new TV now, you ask, and thinking about waiting until HDMI 2.1 comes out? Don’t. You’ll bewaiting for a while for it to come out in the first place, and the benefits of HDMI 2.1 will come in as a trickle, not a stream.
Yes. As you’ll learn in the specs-oriented tech explanation of HDMI 2.1 below, the new standard nearly triples the amount of data that can fit down an HDMI cable at once. That being the case, to take full advantage of HDMI 2.1, the use of a new Ultra High-Speed HDMI cable will be required. In some rare instances, it may be possible to use an existing high-speed HDMI cable with a newer HDMI 2.1 device, but since the amount of information being crammed down this digital pipeline is increasing at a rapid rate, it will be wise to buy new Ultra High-Speed HDMI cables at the same time any devices supporting HDMI 2.1 are purchased.
Note: Nothing is changing about the size or connection type of the HDMI cable ports and jacks. The new Ultra High-Speed HDMI cables will fit perfectly into older devices.
Yes. You will be able to connect any HDMI-enabled device supporting any older version of the HDMI standard, and it will work just fine on a new HDMI 2.1-enabled TV or display. For instance, if in the future you want to connect your then-archaic Xbox One to your shiny new 8K TV with HDMI 2.1, that won’t be a problem at all.
In theory, this is possible, but it is highly unlikely. Jeff Park, Director of Technology at HDMI LA, informs us that while there are premium chips out there which can be firmware upgraded, they are extremely expensive and rarely used by manufacturers. Chances are, your TV or 4K Ultra HD Blu-ray player doesn’t have one of those rare chipsets built into it.
Believe it or not, consumer-level home entertainment devices can already approach the 18Gbps bandwidth limits of HDMI 2.0a. Take a 4K Ultra HD Blu-ray disc, for instance (heck, take the best 4K Ultra HD Blu-ray discs!): 4K image resolution on its own is a big bandwidth hog, but then add 10-bit color, 4:4:4 color sampling, 60 FPS content, Dolby Atmos and DTS:X multi-channel surround sound, HDR metadata, and all the other little bits that need to get from a 4K Blu-ray player to a TV, and you get close to maxing out that 18Gbps limit. How do you improve products if you’re already running out of space on the digital highway that carries all this video and audio information? You don’t. You have to pave a new highway, and that’s exactly what the HDMI organization has done with HDMI 2.1.
Beyond the high resolution and increased frame-rates Hollywood and game studios would like to use, more lines of communication needed to be opened up between devices sitting on either side of an HDMI cable. Right now, your Blu-ray player or game console can talk to your TV, but only tiny bits at a time. They spit words at each other, but they can’t have a conversation in real time. By changing the way HDMI jacks and HDMI cables are structured, the HDMI organization was able to not only handle more traffic on the digital entertainment highway, but route that traffic in a smarter way so that more communication could be had among the traffic.
In other words, if HDMI 2.0 is our existing, choked-up freeway system, then HDMI 2.1 is a mega-highway filled with autonomous cars driving themselves, immune to bottlenecks, and instantly adapting to traffic fluctuations. So what does that mean for youand your entertainment system?
As you’ve gathered by now, HDMI 2.1 can handle lots more information, and it’s easy to understand how that could translate into higher video resolution. High-resolution numbers like 8K and 10K get all the attention, probably because they are significantly larger than the 4K we see on our TVs now and that seems meaningful. But high-resolution capability is the least exciting part about HDMI 2.1 in our opinion, so while we’ll start with resolution specs, stick with us for the rest because HDMI 2.1 enables a more beautiful picture and an easier-to-use system than ever before.
That’s our rundown of HDMI 2.1. As you can see, the new standard opens up a wealth of new possibilities. Now, it’s time for manufacturers to decide how they take advantage of the new spec and turn possibilities into real-life benefits. As has always been the case in the tech world, sometimes watching the change happen is just as fun as experiencing the change itself.
Visit this page at HDMI.org to learn more about HDMI 2.1 specs.
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