HDMI 4K, backward compatible with the HDMI specification, dramatically increases bandwidth to 18 Gbps and adds key improvements to support market demands for improved consumer video and audio experiences.

Advantages of HDMI 4K
HDMI 4K dramatically increases bandwidth to 18 Gbps and includes the following advanced features:
* Up to 4K@50/60 (2160p), four times the resolution of 1080p/60 video, for the best video
an experience
* Up to 32 audio channels to enjoy an immersive multi-dimensional audio experience
* Audio sample frequency up to 1536 kHz for the highest audio fidelity
* Deliver dual video streams to multiple users at the same time on the same screen
* Deliver multi-stream audio simultaneously to multiple users (up to 4)
* Support for wide-angle video playback of 21:9 ratio
* Dynamic synchronization of video and audio streams
* CEC extensions provide more control and extended control of consumer electronic devices through a single point of control