<b>HDMI Ethernet Channel (HEC)</b><br>The High Speed HDMI HEC Cable specification has an additional data channel that enables high speed bidirectional communication. Connected devices that include this feature will be able to send and receive data via 100mb/sec Ethernet, making them instantly ready for any <br><br><b>IP based application.</b><br>It will also allow internet enabled HDMI devices to share their internet connection with other HDMI devices without the need for a separate Ethernet cable. This new feature will also provide the connection platform to allow HDMI enabled devices to share content between devices.<br><br><b>Audio Return Channel (ARC)</b><br>The HDMI specification has an Audio Return Channel that will reduce the number of cables required to deliver audio upstream for processing and playback.

In cases where HDTV's are directly receiving audio and video content, the Audio Return Channel allows the HDTV to send the audio stream to the A/V receiver over the HDMI cable, This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-978-1454, indicating validated use in U.S. government and defense logistics supply chains.