4K TVs come in two specifications, 3840p X 2160p and 4096p X 2160p, both meeting the requirements of HDMI 1.4 specifications. They have added an accompanying audio channel, enabling upstream audio connections and the transmission of 100 Mbps IP-based applications through an additional Ethernet channel. However, considering distance limitations, there are challenges in terms of wiring and connections.

HDBaseT can address these issues.

What is HDBaseT?

In 2010, the HDBaseT Alliance introduced HDBaseT network technology, capable of transmitting uncompressed HDMI signals over a distance of up to 100 meters (328 feet) through twisted-pair cabling systems and modular RJ45 connectors.

By utilizing a direct RJ45 connection or employing an HDMI-to-HDBaseT converter, HDBaseT can transmit audio-video signals from sources such as set-top boxes, Blu-ray players, and video servers to displays. Similar to 5Play™, one of the most significant advantages of HDBaseT is its ability to transmit uncompressed full high-definition video, audio, Ethernet, control, and power over a single network cable.

HDBaseT can transmit 4 Gbps of information downstream in basic mode and up to 8 Gbps in enhanced mode. The upstream HDBaseT receiver can receive Ethernet data sources and control information on the return channel at speeds of up to 150 Mbps.

Better than HDMI

While the HDMI specification does not define the maximum cable length, most HDMI cable runs will not exceed 5 to 15 meters. If this distance is exceeded, the integrity of the HD signal will be greatly compromised. If uncompressed, wait-free 4K signals need to be transmitted as required, the length of the cable will need to be reduced, or even reduced a lot.

Of course, this short-distance transmission may be enough for some home consumers, but it is certainly not suitable for commercial environments, such as digital signage used in hospitals, airports, hotels, etc. Of course, these distance limitations can be ignored because HDBaseT can transmit HDMI information up to 100 meters.

Not only are HDMI connectors easily detached, they are virtually impossible to terminate in place, and it is not that easy to thread HDMI cables through conduits. Being able to use RJ45 connectors to terminate HDBaseT cables on-site will be easier, and there is no need to judge the cable length in advance. The installation process will be simpler and more skillful, and it can also save labor.

HDMI cables need to be tested and verified using specialized equipment. HDBaseT's encoding and bandwidth are similar to 10GBASE-T and can be tested using typical network testing equipment.

Things to consider

HDBaseT is positioned to reduce the cost of HD video transmission, making it more accessible. Therefore, to facilitate the widespread adoption of 4K, considerations about cabling become crucial.

In general, shorter cable lengths result in stronger signals when transmitted to HDBaseT receivers and allow for external crosstalk between bundled cables. If bundled cables are configured, Cat.5e UTP cables can only support a maximum transmission distance of 10 meters for HDBaseT, while Cat.6 UTP cables can support up to 40 meters. To achieve a 100-meter transmission distance, Cat.6A UTP cables or shielded Cat.5e or Cat.6 cables can be used.

For shielded cables to effectively suppress external crosstalk and support a 100-meter transmission distance, it is essential to ensure the shielding integrity at all connection points, forming a unified, low-resistance grounding system to maintain clear HD images. Cat.6A UTP, like the Belden 10GX system, stands out as an optimal choice for implementing HDBaseT technology in AV networks.