The HDMI Forum Finally Releases the HDMI 2.1 Specification

The HDMI Forum today announced the release of Version 2.1 of the HDMI Specification which is now available to all HDMI 2.0 adopters. This latest HDMI Specification supports a range of higher video resolutions and refresh rates including 8K60 and 4K120 and resolutions up to 10K. Dynamic HDR formats are also supported and bandwidth capability is increased up to 48 Gbps.

Supporting the 48Gbps bandwidth is the new Ultra High Speed HDMI Cable. The cable ensures high-bandwidth dependent features are delivered including uncompressed 8K video with HDR. It features exceptionally low EMI (electro-magnetic interference) which reduces interference with nearby wireless devices. The cable is backwards compatible and can be used with the existing installed base of HDMI devices.

Version 2.1 of the HDMI Specification is backward compatible with earlier versions of the specification, and was developed by the HDMI Forum’s Technical Working Group whose members represent some of the world’s leading manufacturers of consumer electronics, personal computers, mobile devices, cables and components. 

HDMI Specification 2.1 Features Include:

  • Higher video resolutions support a range of high resolutions and faster refresh rates including 8K60Hz and 4K120Hz for immersive viewing and smooth fast-action detail. Resolutions up to 10K are also supported for commercial AV, and industrial and specialty usages.
  • Dynamic HDR support ensures every moment of a video is displayed at its ideal values for depth, detail, brightness, contrast and wider color gamuts — on a scene-by-scene or even a frame-by-frame basis.
  • The Ultra High Speed HDMI Cable supports the 48G bandwidth for uncompressed HDMI 2.1 feature support. The cable also features very low EMI emission and is backwards compatible with earlier versions of the HDMI Specification and can be used with existing HDMI devices.
  • eARC simplifies connectivity, provides greater ease of use, and supports the most advanced audio formats and highest audio quality. It ensures full compatibility between audio devices and upcoming HDMI 2.1 products.
  • Enhanced refresh rate features ensure an added level of smooth and seamless
  • motion and transitions for gaming, movies and video. They include:
    • Variable Refresh Rate (VRR) reduces or eliminates lag, stutter and frame tearing for more fluid and better detailed gameplay.
    • Quick Media Switching (QMS) for movies and video eliminates the delay that can result in blank screens before content is displayed.
    • Quick Frame Transport (QFT) reduces latency for smoother no-lag gaming, and real-time interactive virtual reality.
  • Auto Low Latency Mode (ALLM) allows the ideal latency setting to automatically be set allowing for smooth, lag-free and uninterrupted viewing and interactivity.

The HDMI 2.1 Compliance Test Specification (CTS) is here.

Gary Kayye

About Gary Kayye

Gary Kayye, founder of rAVe Publications, is one of the most prominent personalities in the audiovisual industry. He has been a contributor to WIRED magazine and a technical advisor and columnist for Sound & Communications magazine as well as an opinionated columnist for rAVe [Publications] since 2003. In addition to his writing and market analysis, Gary has been a product, marketing and business operations consultant to dozens of AV companies in the U.S. and overseas. Clients have included companies such as Sony, Sharp, Epson, Lutron, InFocus, Sanyo, Mitsubishi, NEC and Philips.   Gary, who has been involved with the audiovisual market for over 20 years, was the recipient of the InfoComm 2003 Educator of the Year Award and the 2007 NSCA Instructor of the Year Award. Over the years, he has donated much of his time as an active volunteer in the AV industry’s trade association and served as chairman of InfoComm’s Professional Education & Training Committee (PETC), chairman of the ICIA Design School Committee and chairman of InfoComm’s Installation School Committee. In addition, he has served on the InfoComm board of governors. He also helped grow the InfoComm Projection Shoot-Out as the premiere AV industry trade show special event serving on the committee from 1991 through 1997, and was instrumental in launching the Shoot-Out in the European market at the Photokina Expo in 1994 and 1996 as well as the Asian market at the 1995 and 1997 INFOCOMM Asia shows.   Prior to founding his own company, Gary was vice president of sales and marketing for AMX Corporation (www.amx.com), a manufacturer specializing in professional AV and residential AV control systems. Prior to AMX, Gary spent nine years at Extron Electronics (www.extron.com), rising to the position of vice president of sales and marketing. Gary earned his bachelor’s degree in journalism in 1987 from the University of North Carolina and is currently Adjunct Faculty at UNC in the School of Journalism teaching a class on how future technologies will affect the future of advertising, PR and marketing.   He is also the founder of Swim for Smiles, a non-profit that raises money for the N.C. Children’s Hospital through swimming and other fitness-related events for kids. You can contact him at gary@ravepubs.com..