What does ARC mean and what is the use of HDMI supporting ARC?

Abramhham

Member
When viewing the projector parameters, many users often see that some HDMI interfaces are followed by ARC on the interface parameters. So what does this ARC mean? What is the use of HDMI supporting ARC?

1. What does ARC mean
The full English name of ARC is Audio Return Channel. The main function of ARC is to transmit sound signals, and its appearance can make the installation of digital home appliances simple and convenient.

2. What is the use of HDMI supporting ARC
On the HDMI interface that supports ARC, the electronic device can pass the audio signal back to the power amplifier or other audio equipment that supports the ARC function through the ARC through the HDMI cable, so that no additional digital output cables are needed. Not only that, the projection device or smart TV can also directly reverse the digital audio output to the power amplifier through the HDMI cable for decoding.

3. ARC use case
When users play high-definition video directly on the projector and want to enjoy 5.1-channel audio, they need to connect to the amplifier at this time. According to the traditional method, it is necessary to connect the power amplifier to decode through the light/coaxial digital audio output port on the projector. But if you have the HDMI ARC interface, you don't have to be so troublesome, you can directly decode the 5.1 channel of digital audio through the HDMI cable.
 
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