HDMI extender

proprietary with dedicated wires / fibers

proprietary TCP / IP based

https://www.ligawo.eu/hdmi-extender-125m-ligawo-6526650/a-6526650/

HDbaseT

http://hdbaset.org/faqs/what-is-the-difference-among-the-different-classes-of-hdbaset/

Aten VE801T sender / Aten VE801R receiver