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1What does HDMI cables with ethernet mean?
HDMI 1.4 introduces a feature called HEC (HDMI Ethernet Channel) The HEC feature uses two pins from the connector: a previously unused pin and the hot plug detect pin.
HDMI Ethernet Channel technology consolidates video, audio, and data streams into a single HDMI cable, and the HEC feature enables IP-based applications over the HDMI cable and provides a bidirectional Ethernet communication at 100 Mbit/s.The physical layer of the Ethernet implementation uses attenuated 100BASE-TX type signals on a single twisted pair for both transmit and receive.
HEC (HDMI Ethernet Channel) and ARC (Audio Return Channel) support combined by one port or cable is also sometimes referred to as "HEAC" (HDMI Ethernet Audio Control).
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by anonymous at 22-01-2019