Just because your TV has a 3,840 x 2,160 resolution does not officially make it an Ultra HD TV, at least not according to the Consumer Electronics Association, which recently updated and expanded its list of core characteristics that a display device needs in order to be considered a true Ultra HD display. Here's the rundown of those core characteristics:
1. Display Resolution: Has at least eight million active pixels, with at least 3,840 pixels horizontally and at least 2,160 pixels vertically.
2. Aspect Ratio: Has a width-to-height ratio of the display's native resolution of 16:9 or wider.
3. Upconversion: Is capable of upscaling HD video and displaying it at Ultra High-Definition resolution.
4. Digital Input: Has one or more HDMI inputs supporting at least a 3,840 x 2,160 native content resolution at 24p, 30p, and 60p frames per second. At least one of the 3,840 x 2,160 HDMI inputs shall support HDCP revision 2.2 or equivalent content protection.
5. Colorimetry: Processes 2160p video inputs encoded according to ITU-R BT.709 color space and may support wider colorimetry standards.
6. Bit Depth: Has a minimum color bit depth of eight bits.
These core characteristics build upon the first-generation UHD characteristics released by the CEA back in October 2012, which required only three elements: 1) a display resolution of at least eight million active pixels, with at least 3,840 horizontally and at least 2,160 vertically; 2) an aspect ratio with width to height of at least 16:9; and 3) at least one digital input capable of carrying and presenting native 4K format video from this input at a full 3,840 x 2,160 resolution without relying solely on upconverting.
The importance of some of the additions is clear, while others are not so obviously vital. Number four is the big addition that addresses the arrival of HDMI 2.0. First- and second-generation UHD TVs that sported HDMI 1.4 inputs could only accept native UHD content with a maximum frame rate of 30 frames per second, while new UHD TVs with HDMI 2.0 can accept UHD signals at up to 60 frames per second. Most film content is shot at 24 frames per second, so the older HDMI 1.4 spec is fine for 2D UHD film playback. However, you couldn't watch The Hobbit in UHD at 48fps, nor could you watch 3D films in UHD. Future UHD gaming, sports, and potentially film content could be created at 60fps, and you'll need HDMI 2.0 to accept those sources. (Some manufacturers have provided an upgrade path to HDMI 2.0 for those earlier UHD TVs.)
At least one of those HDMI 2.0 ports must also support HDCP 2.2 content protection, designed to provide the secure transmission of content from a future UHD source to the TV. Right now, no such source device exists, and no content that I'm aware of contains the encryption, but it is coming, so it matters whether or not your UHD display can handle it (or be upgraded to do so). HDMI 2.0 and HDCP 2.2 don't necessarily go hand in hand righ t now, so it's wise that the CEA chose to add this provision.
Click on over to Page 2 for the rest of the Core Characteristics . . .