HDMI 2.1 provides a host of features not available in earlier HDMI versions. This white paper compares and defines those features, as well as provides comparative look at each HDMI version’s maximum transmission bandwidth and supported signal resolution.

  HDMI Version
Features 1.0 1.1 1.2 1.3 1.4 2.0 2.1
Consumer Electronic Control (CEC) Yes Yes Yes Yes Yes Yes Yes
DVD-Audio No Yes Yes Yes Yes Yes Yes
Super Audio CD (DSD) No No Yes Yes Yes Yes Yes
Auto Lip-Sync Correction No No No Yes Yes Yes Yes
Dolby TrueHD / DTS-HD Master Audio No No No Yes Yes Yes Yes
Next Generation CEC Commands No No No Yes Yes Yes Yes
3D Video No No No No Yes Yes Yes
Ethernet Channel No No No No Yes Yes Yes
Audio Return Channel (ARC) No No No No Yes Yes Yes
4 Audio Streams No No No No No Yes Yes
2 Video Streams (Dual View) No No No No No Yes Yes
Hybrid Log-Gamma (HLG) HDR OETF No No No No No Yes Yes
Static HDR No No No No No Yes Yes
Dynamic HDR No No No No No No Yes
Enhanced Audio Return Channel (eARC) No No No No No No Yes
Variable Refresh Rate (VRR) No No No No No No Yes
Quick Media Switching (QMS) No No No No No No Yes
Quick Frame Transport (QFT) No No No No No No Yes
Auto Low Latency Mode (ALLM) No No No No No No Yes
Display Stream Compression (DSC)
No
No
No
No
No
No
Yes
Signal Performance 1.0 1.1 1.2 1.3 1.4 2.0 2.1
Maximum Transmission Bandwidth 4.95G 4.95G 4.95G 10.2G 10.2G 18G 48G
Maximum Supported Signal Resolution 1080p 1080p 1080p 4K 30 4K 30 4K 60 8K

Feature Function
Dynamic HDR High dynamic range information is transmitted to the display frame by frame, creating superior image performance by allowing for finer control of brightness and color levels.
Enhanced Audio Return Channel (eARC) Provides the direct connectivity of sources, displays and sound systems, creating a simpler approach to integrating and using multichannel audio in the home.
Variable Refresh Rate (VRR) Allows dynamic display refresh rates that can continuously and seamlessly vary on the fly, thereby eliminating image artifacts, stuttering and tearing.
Quick Media Switching (QMS) Eliminates signal delays that result in blank screens when switching between and/or selecting sources.
Quick Frame Transport (QFT) Reduces signal latency for smoother no-lag gaming and real-time interactive virtual reality.
Auto Low Latency Mode (ALLM) Allows for the optimum latency setting to automatically be set for smoother, lag-free uninterrupted viewing and interactivity.
Display Stream Compression (DSC)
Automatically compresses signals to achieve ultra-high resolutions and frame rate combinations.

Download the white paper here: HDMI 2.1 Features, Definitions & Version Comparison