what is the difference between hdmi arc and earc?

What you need to know about HDMI ARC and eARC

How to play Dolby Atmos format audio using a Multi Channel AV receiver or Sound Bar

4K HDMI ARC/eARC Audio Adapter Converter-BUNGPUNG

HDMI ARC Audio Adapter - FeinTech

What's HDMI ARC? - Coolblue - anything for a smile

Understanding the Difference: HDMI ARC vs. eARC Explained - The Infobits

HDMI ARC vs eARC - What is the difference? Simple explanation

What Is HDMI ARC (Audio Return Channel)?

HDMI ARC vs eARC, Which One Is Better for Your Home Theater? - The Plug - HelloTech

Etzin 8K HDMI 2.1 eARC Audio Extractor 7.1CH HDMI ARC eARC To Coaxial Optical Toslink SPDIF Stereo Analog Audio Return Channel Adapter : : Electronics

8 Steps To Let You Know: HDMI ARC vs Optical

What is eARC and how does it compare to HDMI ARC? - SoundGuys

HDMI ARC VS Optical - uni

HDMI ARC and eARC: Audio Return Channel for beginners - CNET