HDMI 2.0: What you need to know

The HDMI Forum, the nonprofit body that oversees the HDMI specification, recently announced version 2.0. There were numerous changes, not least support for higher frame rates than are possible with the current 1.4 specification.

Do you need to upgrade? Will your cables still work? What does this mean for the future of TVs? Do you care? Answers for all these questions (except maybe the last one) below...

First, here's where we are now. The until-now most recent version of the HDMI specification was version 1.4. It specified a number of things, like 4,096x2,160-pixel resolution up to 24 frames per second, or 3,820x2,160 up to 30fps. If you've bought any gear with an HDMI connector in the past few years, it's probably version 1.4. It carried over all the features and support from previous versions, plus added 3D, Audio Return Channel, and so on.

2.0 for 4K
With the TV industry moving inexorably toward Ultra HD "4K," it was clear there needed to be more bandwidth in the connection to handle the future's higher resolutions and frame rates. On that front, HDMI 2.0 delivers, supporting "4K" (2160p by the Forum's explanation) up to 60fps. This allows for full-resolution 4K 3D, along with higher-frame-rate 2D content, like (potentially) home videos and computer games (PC, not PS4/Xbox One). Since almost all movies are shot at 24fps, this increase is less important for feature films or scripted TV shows.

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