HDBaseT new transport protocol

HDBaseT, which is composed of Japanese and Korean home appliance manufacturers LG, Samsung, Sony, and Israel's semiconductor company Valens Semiconductor, formed the HDBaseT alliance. In 2009, it passed Intel's HDCP certification. At the end of June 2010, HDBaseT 1.0 was determined. Formal specification. HDBaseT does not redesign a new interface like HDMI and Display Port. Instead, it uses the 8P8C (RJ45) connector, which is no stranger to the public. It is commonly known as a crystal head or an Ethernet connector. The transmission medium uses a very easy and common network cable. In addition to providing video signal transmission, the HDBaseT standard also features network connectivity and Power over Ethernet (POE).

HDbaseT supports up to 20Gbps transmission rate, which can better support future 3D and 2K×4K video formats. The transmission uses ordinary CAT5e/6 network cable, and the connector also uses ordinary RJ45 connector, and the transmission distance reaches 100 meters. In addition, USB, Ethernet functions, 100W power supply (PoE) and other control signal channels are also available.

Comparison of standards
standard HDMI 1 .4 DiiVA HDBaseT
Uncompressed video/audio transmission rate 10.2Gbps 13.5Gbps Up to 20Gbps
Support transmission cable length 10m 26m 100m
Cable type HDMI cable DiiVA special cable Low-cost standard Super Category 5 or Category 6 line
Connector HDMI connector DiiVA special connector Standard RJ-45 connector
Power supply capability No 5W Up to 100W (can be used for applications such as set-top boxes to power LCD TVs)
Ethernet 100Mbps Giga Giga
Daisy chain No Yes Yes
Multi-flow No Yes Yes
Easy to install No No Yes (similar to network cable installation)
HDCP certification Yes No Yes
Need to modify the firmware No Yes No
USB No Yes Yes
Network Cabling No Limited by distance, limited to single room daisy chain and star topology Long distance, daisy chain and star topology for office and industrial environments

The elements that gave birth to HDBaseT are roughly the following:
1. The transmission distance of the HDMI cable is only about 10 meters, which greatly limits the range of use of HD devices, and the HDBaseT transmission distance can reach 100 meters.
2. HDMI cable is expensive, and HDBaseT uses a cheap and easy-to-use CAT5/6 Ethernet cable as the transmission medium.
3. HDMI is a closed standard. Vendors use the HDMI interface to pay a certain license fee, while HDBaseT is an open standard and does not require additional fees.
4. The HDBaseT standard currently supports a maximum transmission rate of 20Gb/s, which is four times the maximum transmission rate of HDMI of 5Gb/s, and can fully satisfy all uncompressed 1080p or more clear 4K x 2K video transmission.

HDBaseT is known as the "Next Generation Audio and Video Cable Standard". Although HDBaseT equipment has not yet been popularized, the HDBaseT Alliance consisting of a strong lineup of Sony, LG, Samsung and Israeli semiconductor company Valens Semiconductor is already developing the latest HDBaseT 2.0. It is.

According to reports, the HDBaseT 2.0 standard not only enables high-definition signal transmission, but also supports 5.1-channel support, which is compatible with almost all video and audio sources. At the same time, HDBaseT also supports USB 2.0 in consideration of mobile devices. . This means that the traditional audio and video equipment wiring will be completely subverted, think about using a cheap network cable to connect 5.1 boxes, and the sound quality is comparable to HDMI, very exciting, whether it is consumers, or equipment vendors.

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