Question: is mhl the same as arc?
Answer: Yes, you can use both devices in HDMI ARC and CEC port. HDMI (ARC) - The port of HDMI (ARC) audio return channel is a standard HDMI1. ... HDMI (MHL) - The port of HDMI (MHL) mobile high-definition link, is used to connect to a TV and smartphone display on a television pictures or video directly from your smartphone.