HDMI21 is here, but there are still plenty of questions to be answered. In this guide, we cover the current version while discussing the future of HDMI.
HDMI 2.1 is quickly becoming a new standard for state-of-the-art TVs, A/V receivers, and next-gen gaming systems from the likes of Microsoft and Sony. But it wasn’t too long ago that the world of consumer tech was touting the glories of HDMI 2.0 and 2.0b. In fact, many of us still own TVs and other hardware that only feature these lesser-rated inputs.
It’s true that HDMI 2.1 opens up a wealth of new possibilities, which we’ll get into shortly, but these features are rolling out slowly based on the state of consumer technology. The changes are exciting, but HDMI 2.1’s potential won’t be fully unlocked until technologies like 8K TV resolution and 4K at 120Hz go mainstream.Is it okay to buy a TV that doesn’t have HDMI 2.1? In the past, our advice was, “Go ahead and buy that TV with confidence.” HDMI 2.1 was still too far away.
In some rare instances, it may be possible to use an existing Certified 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, we advise you to buy new Ultra High-Speed HDMI cables along with any HDMI 2.1-capable device that doesn’t already include them. If that sounds expensive, don’t worry — they don’t cost much more than standard High-Speed HDMI cables.
Can my HDMI 2.0b devices be firmware upgraded to HDMI 2.1? In theory, yes. In practice, probably not. While there are premium chips out there that can be firmware upgraded, they are extremely expensive and rarely used by manufacturers. Chances are that your existing HDMI 2.0b devices don’t have one of those rare chipsets built into them.
In other words, if HDMI 2.0b is our existing, choked-up freeway system, then HDMI 2.1 is a mega-highway filled with self-driving cars, immune to bottlenecks, and instantly adapting to traffic fluctuations. So, what does that mean for you and your entertainment system? eARC The Audio Return Channel is an HDMI 2.0b feature that lets audio move back and forth over an HDMI cable between a TV and an A/V receiver or soundbar. Unfortunately, the limited bandwidth of HDMI 2.0b means that audio is often compressed and reduced down to stereo, resulting in “lossy,” lower-quality audio.
The only hangup with Dolby Vision is that it is a proprietary technology, and not every electronics manufacturer wants to pay licensing fees to use it. HDMI 2.1 brings dynamic HDR performance to other flavors, including the dynamic version of HDR10, known as HDR10+, and others, which should bring better HDR experiences to more TVs and more formats.
Quick frame transport This feature reduces the time it takes for a frame of video to pass from the source device to a display . Again, this is great for gamers, who will notice much less lag, especially those who like fast-action, first-person shooters. VR users will benefit from an equally reduced time between movements and the world presented through their goggles.
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