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It’s no secret that HDMI is the current industry-standard for audio/video interface, and it has a ubiquitous presence on almost every media device manufactured in the last fifteen years. However, not a lot of people are aware that HDMI cables are capable of bidirectional Ethernet communication at relatively high speeds since 2009.
An HDMI cable with Ethernet relies on HDMI Ethernet Channel (HEC), a protocol introduced right alongside Audio Return Channel (ARC) with the HDMI 1.4 release in 2009. It provides a bidirectional network data delivery link between two HDMI-connected devices, allowing them to share an internet connection at speeds of up to 100 Mbit (12.5 Mbyte) per second. Enhanced Audio Return Channel (also known as eARC) is the next generation of ARC. It’s a feature implemented in the most recent HDMI 2.1 specification. As you know, HDMI is the standard all-in-one audiovisual connection for devices, and you might be surprised to know that some HDMI cables can carry over the internet too. You might have heard that HDMI can carry over ethernet signals and you’re wondering if using HDMI cables to connect to the internet is a good idea.The ethernet channel built into compatible HDMI cables can transfer data between two connected devices. This allows them to share the wired connection. To better understand how this works, we need to open up an HDMI cable and see what’s inside. An HDMI cable has 19 pins that it uses to transfer all kinds of data. There’s scope for eARC to deliver up to 32 channels of audio, including eight-channel, 24bit/192kHz uncompressed data streams at speeds of up to 38Mbps. The bandwidth required for HDMI over Ethernet depends on the resolution and refresh rate of the HDMI signal. While HDMI to IP encoders allow to convert HDMI video and analog audio input signals to H.264 for streaming over an IP network connection, HDMI to IP decoders decrypt the compressed IP data stream to display it on a remote output device. These devices are also reffered to as IP streamers when used with specific codecs.
Yes, HDMI over Ethernet extenders require power to function. The transmitter and receiver units must be plugged into an electrical outlet or powered through PoE (Power over Ethernet) injector. This configuration does not detract from the function of the other pins, and for the most part, doesn’t affect the price of the cable either. As a result, you would be hard-pressed to find an HDMI cable these days without ethernet being included.HDMI cables come in different types, including 1) standard with ethernet, 2) high-speed with ethernet, and 3) ultra-high-speed with ethernet. All these cables listed above will be able to handle transferring internet data at speeds up to 100 Mbps. How to Tell if Your Devices are HEC Compatible It wasn’t until 2009 that the HDMI ARC protocol was added to the spec sheet. It was introduced as part of HDMI version 1.4 and has been part of the specification ever since. What is ARC? When HDMI 1.4 made its debut, HEC or HDMI Ethernet Channel was pitched as a convenience factor. Rather than relying on two separate cables for AV and Ethernet, users could just use one cable connected to a TV or home entertainment device to fulfill their needs.To extend HDMI over Ethernet, you will need an HDMI over Ethernet extender. The extender consists of a transmitter and a receiver. The transmitter is connected to the source device, such as a computer or Blu-ray player, and the receiver is connected to the display device, such as a television or projector. HDMI over Ethernet is becoming increasingly popular for use in home theaters, digital signage, and other commercial applications where long-distance HDMI signal transmission is required. How to Extend HDMI over Ethernet?
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