CEC allows you to operate multiple devices via one remote. ARC and eARC technology transfer audio between connected devices.

HDMI-CEC technology allows various remote controls to operate multiple connected devices with ease. CEC simplifies device control but may have drawbacks, like turning on devices unintentionally.

There’s some interesting stuff lurking around in the HDMI spec, and at DEF CON, [Joshua Smith] laid the Consumer Electronics Control (CEC) part of HDMI out on the line, and exposed a few ...