Probably HDMI-CEC One-Touch Play. CEC stands for Consumer Electronics Control, and it's a suite of control signals that can be used through HDMI. However, suppo

Probably HDMI-CEC One-Touch Play. CEC stands for Consumer Electronics Control, and it's a suite of control signals that can be used through HDMI. However, support doesn't seem to be universal, and it seems that some TVs implement slightly different subsets of the standard.