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What is the difference between HDBaseT and HDMI and SDI interfaces ?

What is the difference between HDBaseT and HDMI and SDI interfaces  ?


HDBaseT, from Japan and South Korea's home appliance manufacturers LG, Samsung, Sony and other companies, and Israel's semiconductor company Valens Semiconductor, formed the HDBaseT Alliance, which passed Intel's HDCP certification in 2009. At the end of June 2010, the HDBaseT 1.0 Formal specification.


HDBaseT does not redesign a new interface like HDMI and Display Port, but uses the 8P8C (RJ45) connector that is familiar to the public, commonly known as crystal head or Ethernet connector. The transmission medium uses a very accessible and common network cable.


In addition to providing video signal transmission functions, the HDBaseT standard also has network connectivity and Power over Ethernet (POE) functions.


The difference between HDBaseT and HDMI, SDI interface


1. SDI  Serial Digital Interface 


The SDI interface is a digital component serial interface; it is divided into standard definition SD-SDI, high-definition standard HD-SDI and 3G-SDI according to the rate, and the corresponding rates are 270Mb/s, 1.485Gb/s and 2.97Gb/s respectively.


2. HDMI High Definition Multimedia Interface 


HDMI is a high-definition multimedia interface. It is a digital video/audio interface technology. It is a dedicated digital interface suitable for video transmission. It can transmit audio and video signals at the same time. The maximum data transmission speed is 18Gbps



3. HDBaseT


HDbaseT 1.0 supports a maximum transmission rate of 20Gbps, and can support FULL 3D and 4K x 2K video formats. The transmission adopts ordinary CAT5e/6 network cables for uncompressed transmission. The connectors also use ordinary RJ45 connectors, and the transmission distance reaches 100 meters, in addition, also provides Ethernet capability, 100W power supply capability (PoE) and other control signal channels


From the above content, the advantages of HDBaseT are as follows:


1) HDBaseT can support uncompressed audio and video transmission rate up to 20Gbps, HDBaseT provides Ethernet function and 100W power supply capability (PoE).


2) HDBaseT is a standard based on network transmission. Only one network cable can integrate audio, video, network, control signals and power supply lines. Simplifies installation, connection and maintenance, and reduces costs.


3) HDBaseT uses ordinary low-cost network cables as transmission cables, and the transmission distance is up to 100 meters; HDMI must use special and expensive cables, and the transmission distance is only about 10~15 meters, which greatly limits the use of high-definition equipment. The wiring of the equipment is also problematic.


4) Ultra High Resolution HDBaseT Ultra HD Resolution or 4K. HDBaseT technology allows the delivery of uncompressed Ultra HD video.


5) HDMI is a closed standard, and manufacturers need to pay a certain license fee for using the HDMI interface, while HDBaseT is an open standard and does not need to pay additional fees.


HDBaseT technology PTZ camera application


Traditional PTZ (Pan-tilt-zoom) and small cameras typically require three wires to operate: video, control, and power.


HDBaseT allows a CAT5e/6 line up to 100m/328 feet to connect to the receiver, providing power and control as well as video (up to 4K).


Either in terms of providing video to the control room or remote control from the control room via any control standard such as RS232, RS485, USB or Ethernet.


Existing solutions require three wires to ensure proper operation. But with HDBaseT, only one line is needed to transmit the video to the receiving device or control the camera.


In summary, HDBaseT is more powerful than HDMI, SDI, DVI, etc. in terms of wiring and functions. HDBaseT video conference cameras support 1080p60fps and 4K60fps ultra-high-definition picture real output


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