HDMI 2.1 released, brings 10K and higher bandwidth support

HDMI 2.1’s full specification has just been released - and it proves a forward-looking standard, able to cope with a range of higher picture resolutions and refresh rates that have yet to hit the market.

The big news is the capacity to carry up to 10K (yes, 10K) signals. (And here we were just getting used to 4K and the idea of 8K.) But perhaps more pertinent is the ability to deliver a 4k/120Hz image combined with dynamic HDR formats. The new standard has a hugely increased bandwidth of 48Gbps - more than doubling the ability of the previous (2.0) version, which allowed 18Gbps.

HDMI 2.1 is also better able to cope with the EMI (electromagnetic interference) generated by nearby wireless devices than the current standard. Considering the rise of wireless products, this can only be a good thing.

Other new features are aimed at improving motion (by introducing the option of variable refresh rates), reducing the amount of time it takes to go from blank screen to content being shown, and minimising latency in the system.

As with previous HDMI upgrades, 2.1 remains backward-compatible. Which is just as well, really.

MORE:

HDR 10 vs Dolby Vision

FIFA confirms entire 2018 World Cup will be available in UHD

4K TV reviews

Becky Roberts

Becky is the managing editor of What Hi-Fi? and, since her recent move to Melbourne, also the editor of the brand's sister magazines Down Under – Australian Hi-Fi and Audio Esoterica. During her 11+ years in the hi-fi industry, she has reviewed all manner of audio gear, from budget amplifiers to high-end speakers, and particularly specialises in headphones and head-fi devices. In her spare time, Becky can often be found running, watching Liverpool FC and horror movies, and hunting for gluten-free cake.

Latest in Cables
Ecosse CS2.15Mk2 speaker cable on white surface
Ecosse CS2.15Mk2
Speaker cable: QED Golden Anniversary XT
QED Golden Anniversary XT
Audio cable: Chord Company ClearwayX ARAY Analogue RCA
Chord Company ClearwayX ARAY Analogue RCA
AudioQuest Rocket 11 cables
3 rookie mistakes to avoid when buying speaker cables
Chord EpicX ARAY
Chord ups the epicness of its popular high-end audio interconnect
Chord Company SignatureX Tuned ARAY
Chord Company’s new interconnect promises "the best performance in 25 years" - but it'll cost you
Latest in News
Audiolab 6000A MkII amplifier in silver
Audiolab upgrades its five-star 6000A amplifier with a new DAC chip, enhanced circuitry and HDMI ARC
Qobuz
Qobuz reveals average payout per stream – and claims it is higher than rivals
Sonos Beam Gen 2
Quick! This five-star Sonos Dolby Atmos soundbar has dropped close to its lowest price
The Google Pixel 9a being held horizontally at waist-height so only the back is visible.
The Google Pixel 9a launches at £100 less than the iPhone 16e with a better screen
A woman flicking through stacks of vinyl records in a Rough Trade shop.
Vinyl records and music streaming both hit landmark highs – but the one growing faster in revenue may surprise you
Vertere DG X turntable in black finish
Vertere's gorgeous DG X turntable features significant updates for a more refined performance overall