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HDMI over Ethernet: 5 Key Things to Know Before Setting Up

Introduction

HDMI over Ethernet is a practical solution when traditional HDMI cables are too short for your setup. Whether it’s a large conference room, home theatre, digital signage, or educational institution, this method allows you to transmit high-quality video and audio over long distances using Ethernet cables. In this article, we will cover how it works, the equipment required, power needs, bandwidth considerations, and important factors to check before installation.

1. Understanding HDMI over Ethernet

HDMI over Ethernet is a technology that enables the transfer of HDMI audio and video signals using Ethernet cables. It involves sending signals from a source device, such as a media player or computer, to a display like a projector or TV.

Unlike traditional HDMI cables, which have length limitations, Ethernet cables can transmit signals much further without significant quality loss. This makes it suitable for offices, auditoriums, retail outlets, and even surveillance control rooms managed by AI CCTV camera manufacturers or AI CCTV camera mfg where multiple displays are needed.

2. How to Extend HDMI over Ethernet

To extend HDMI over Ethernet, you will need an HDMI over Ethernet extender kit. These kits usually include:

  • Transmitter – Connected to the source device.

  • Receiver – Connected to the display.

  • Ethernet cable – Connecting both units, sometimes through a LAN switch.

Ethernet cables can be up to 100 metres long for direct connections. For even greater distances, the system can be linked through a Local Area Network, extending coverage to multiple rooms or buildings.

3. How HDMI over Ethernet Works

This technology works by converting the HDMI signal into a data format suitable for transmission over Ethernet.

  • The transmitter takes the HDMI input and encodes it into data packets.

  • These packets travel over the Ethernet cable or LAN network.

  • The receiver then decodes the data back into a standard HDMI signal for display.

The process ensures that high-definition video and audio remain synchronised and clear, making it ideal for applications where quality is critical, such as live events, educational presentations, or monitoring systems.

4. Does HDMI over Ethernet Require Power?

Yes, both transmitter and receiver units require power. This can be provided in two ways:

  • Direct power supply – Plugging the devices into a power socket.

  • Power over Ethernet (PoE) – Where the Ethernet cable itself delivers both data and power.

PoE is especially convenient in setups where access to multiple power points is limited, reducing cable clutter.

5. Bandwidth Requirements for HDMI over Ethernet

The bandwidth requirement depends on the resolution and refresh rate of the video:

  • 1080p: Approximately 6 Gbps

  • 4K UHD: Approximately 18 Gbps

To ensure stable performance, use Gigabit Ethernet or higher. Lower bandwidth networks can result in lag, loss of quality, or dropped signals.

Essential Equipment for HDMI over Ethernet

If you plan to set up HDMI over Ethernet, you will need:

  • HDMI over Ethernet extender kit (transmitter + receiver)

  • Ethernet cable (Cat5e, Cat6, or higher)

  • Power supply or PoE injector

Top Factors to Consider Before Installation

When choosing an HDMI over Ethernet solution, keep these points in mind:

  1. Distance Coverage – Ensure the system supports the required cable length.

  2. Video Resolution – Check compatibility with your desired resolution (HD, Full HD, or 4K).

  3. Network Speed – A faster network ensures smoother video and audio.

  4. Power Options – Decide between direct power supply or PoE based on installation needs.

  5. Device Compatibility – Verify that the transmitter and receiver work with your current equipment.

  6. Ease of Setup – Opt for plug-and-play systems for quicker installation.

Applications of HDMI over Ethernet

This technology is useful in:

  • Educational institutions – For lectures and presentations.

  • Retail and malls – For promotional displays.

  • Security control rooms – To transmit live feeds from surveillance systems, including those provided by AI CCTV camera manufacturers.

  • Events and auditoriums – For projecting clear visuals across large spaces.

  • Corporate setups – For meeting rooms and digital signage.

Conclusion

HDMI over Ethernet is an effective and scalable solution for transmitting high-quality signals over long distances. With the right extender kit, quality Ethernet cables, and suitable bandwidth, you can achieve clear, lag-free video and audio without the limitations of standard HDMI cables. Whether for entertainment, education, or security purposes, this technology offers flexibility and reliability, making it a valuable addition to modern installations.