What Is This HDMI ARC Port on My TV? - How-To Geek
https://www.howtogeek.com/305241/what-is-this-hdmi-arc-port-on-my-tv/
May 03, 2017 · Since HDMI 1.4, HDMI has supported a specification known as HDMI ARC (Audio Return Channel) that offers two-way communication, similar to the HDMI control scheme specification HDMI-CEC. In the original HDMI standard, your TV could receive audio through HDMI, like when your Blu-ray player sends audio and video on the same cable—but it could ...
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