Devices and smart home
ARC
Abbreviation for Audio Return Channel
In short and in plain language
ARC is a feature of the cable link for picture and sound.
It sends the sound of the television back to a soundbar or sound system.
So a single cable between television and soundbar is enough.
A newer version carries more kinds of sound.
Definition
ARC is an HDMI function that sends the television's sound back to a soundbar or audio system. So a single HDMI cable between television and soundbar is enough. The newer version is called eARC and carries more sound formats.