Today, we're taking a look at two innovations in the HDMI cable connection standard: HDMI ARC and HDMI eARC. ARC stands for Audio Return Channel, and eARC stands for Enhanced Audio Return Channel.

In 2017, HDMI 2.1 introduced eARC, which added support for high-end surround sound such as Dolby Atmos and DTS:X. eARC also supports variable refresh rate (VRR), quick media switching (QMS ...