HDMI 2.0 released: 18Gbps of bandwidth allowing for 4K @ 60 fps, 32 audio channels

by Keith AlvendiaLeave a Comment

This certainly is good news – a new HDMI 2.0 standard which allows for much more bandwidth and support for 4k @ 60fps.

Of course we'll still have to wait for manufacturers to add these capabilities to cameras – but at least there's a standard to move toward.

HDMI 2.0 released: 18Gbps of bandwidth allowing for 4K @ 60 fps, 32 audio channels

Kicking off the IFA consumer electronics show in Berlin, the HDMI Forum has released HDMI 2.0. HDMI 2.0 introduces support for 4K (2160p) at 50 and 60 FPS, 3D playback at 4K resolution, up to 32 audio channels (up from a paltry eight), and some interesting features such as “dynamic auto lip-sync” and the ability to deliver dual video streams to multiple users on the same screen. The max throughput of HDMI 2.0 is a beefy 18Gbps (up from 10Gbps), and you’ll be glad to hear that your stupidly expensive HDMI cable will continue to work with the new spec.

HDMI 2.0 is the first major update to the HDMI specification since version 1.4, which was released way back in 2009. 1.4a and 1.4b were released in 2010 and 2011 respectively, but they mostly focused on support for 3D — which, as we now know, is dead. HDMI 2.0, you’ll be glad to hear, shifts the focus back towards what the interface was originally designed to do: transfer high-definition multimedia content. To this end, the main change in HDMI 2.0 is improving the per-channel bandwidth from 3.4Gbps to 6Gbps, allowing for higher-resolution audio and video to be transferred.

HDMI LG-4k-84-inch


HDMI 2.0 COntinued

The HDMI spec calls for three discrete channels, which are primarily used to carry three different kinds of data/signal: The DDC (display data channel) negotiates which audio/video formats are supported by the receiver, and is used for HDCP (content protection DRM); TMDS (transition minimized differential signaling) carries the actual audiovisual data; and CEC (consumer electronics control) is a channel that allows the user to control HDMI-connected devices via a universal remote, or alternatively allows HDMI devices to control the TV/other HDMI devices.

As far as I can tell, all three channels can be used for audiovisual data, for a combined total of 18Gbps — but this only helps if you want to display three separate images. I don’t think you can combine all three channels to create a single 18Gbps, ultra-high-resolution feed. 6Gbps is enough to carry 4K video at 60 fps, or 3D 4K at 30 fps, along with 32 audio channels, and that seems to be the limit of the HDMI 2.0 spec. The DDC and CEC channels don’t require anywhere near 6Gbps (more like Kbps and Mbps), so most of the remaining 12Gbps will go to waste — unless you use HDMI 2.0′s new “dual video streams” function, which presumably uses two TMDS channels to display two video feeds on a single display. (Or maybe it just halves the main TMDS channel — we’ll probably have to wait a few more months for the spec’s exact details to become public.)

For more information, visit “HDMI 2.0 Released”

  [ Via ExtremeTech ]

(cover photo credit: snap from the site)

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