Beyond 4K UHD: 10K HDMI 2.1 Ultra High-Speed Cable Coming With Dynamic HDR
Stephan Jukic – November 29, 2017
The new version of HDMI, 2.1 has been announced by the HDMI Forum along with the specifications to all HDMI 2.0 adopters. Future products with HDMI 2.1 will boast impressive resolutions of up to 10k, enhanced refresh rates and support for HDR (High Dynamic Range).
Current HDMI 2.0 cables, referred to by some manufacturers as HDMI UHD, give a maximum video bandwidth of 18 Gbit/s, enabling HDMI 2.0 to carry 4K video at 60 Hz with 24 bit/px color dept.
HDMI 2.1 significantly increases transmission of compressed video up to 48Gbps. This allows a greater range of high resolutions and faster refresh rates including 8K at 60Hz , 4K at 120Hz. Resolutions up to 10K at 50Hz are also supported for commercial AV, and industrial and specialty usages.
The enormous increase in bandwidth is achieved by adding a fourth channel and incrementing the bitrates. While HDMI 2.0 uses three data channels operating at 6 Gbit/s, HDMI 2.1 doubles the signaling rate of the data channels to 12 Gbit/s. The structure of the data has been changed to use a new packet-based format with an embedded clock signal, which allows what was formerly the TMDS clock channel to be used as a fourth data channel instead delivering.
HDMI 2.1 will also support Dynamic HDR, for specifying HDR metadata on a scene-by-scene or a frame-by-frame basis. The Enhanced Audio Return Channel (eARC) for object-based audio formats such as Dolby Atmos and DTS:X, ensures full compatibility between audio devices and upcoming HDMI 2.1 products.
Although previous versions of HDMI won’t be compatible with 2.1, the new HDMI 2.1 cable, called “Ultra High Speed HDMI Cable”, is backwards compatible with earlier versions of the HDMI Specification and can be used with existing devices using HDMI ports. It also reduces interference with nearby wireless devices because it features exceptionally low EMI (electro-magnetic interference).
The summary roster of features for the new HDMI 2.1 standard essentially includes all of the following. As you can quickly see, they’re truly designed for a next generation of TV technologies that almost puts to shame what we have today in the standardized consumer market world of HDMI connectivity standards and device display performance levels for even the latest 4K HDR TVs.
- Higher video resolution support as mentioned above and further enhanced by support for much faster refresh rates like [email protected] and [email protected] Resolutions up to 10K to be available for commercial AV and specialty usages.
- Dynamic HDR support that allows for every second of video to be adjusted for ideal levels of high dynamic range depth of color, contrast, brightness and broader color gamut in general, to a scene by scene or even frame by frame level.
- The Ultra High Speed HDMI Cable supports the 48G bandwidth as stated above. But, the new cable standard also offers this with the bonus of low EMI emission and is backwards compatible with earlier versions of the HDMI Specification, meaning it can be used with existing HDMI devices.
- eARC inclusion for support of the most advanced audio formats in existence and full compatibility between audio devices and upcoming HDMI 2.1 products.
- Enhanced refresh rate features that accompany [email protected] and [email protected] which include:
- Variable Refresh Rate (VRR) for reduction and elimination of lag, stutter and frame tearing for more fluid and better detailed gameplay.
- Quick Media Switching (QMS) for movies and video without blank screen lag of any kind.
- Quick Frame Transport (QFT) for reduced latency and consequently smoother no-lag gaming, and real-time interactive virtual reality.