To explain the HD-SDI high-definition serial digital interface technology clearly, we have to mention coaxial high-definition technology. Coaxial high-definition technology is an advanced technology for video transmission. It provides a better solution by using coaxial cables to transmit high-definition video signals. Clearer and more stable image quality.
Coaxial high-definition technology mainly has the following four solutions: analog high-definition technology (AHD), high-definition composite video interface technology (HD-CVI), high-definition serial digital interface technology (HD-SDI) and high-definition transmission video interface technology (HD- TVI).
These coaxial HD technologies all play an important role in video transmission. They all have the ability to provide high-quality images, but they have slightly different application scenarios and characteristics.
Introduction to 4 coaxial HD technologies
Analog High Definition Technology (AHD) : It is a technology that transmits high-definition video through analog signals. It realizes the transmission of high-definition video by improving the resolution and image quality of analog signals.
High-definition composite video interface technology (HD-CVI): It is a technology based on coaxial cables for transmitting high-definition video. It uses composite video signal transmission to combine video, audio and control signals and transmit them through the same coaxial cable.
High-definition transmission video interface technology (HD-TVI): It is a technology for transmitting high-definition video through coaxial cables. It can achieve uncompressed HD video transmission distance of 500 meters using cost-effective UTP coaxial cable . Moreover, this technology also supports bidirectional transmission of control signals, allowing for more flexible camera control.
High-definition serial digital interface technology (HD-SDI): uses digital video signal transmission to maintain the original quality and accuracy of the image. HD-SDI technology has higher image resolution, lower transmission delay and longer transmission distance, and is suitable for application scenarios with high image quality requirements.
Advantages of HD-SDI Technology
High-definition serial digital interface technology (HD-SDI) has the following advantages over analog high-definition technology (AHD), high-definition composite video interface technology (HD-CVI) and high-definition transmission video interface technology (HD-TVI):
Higher image quality: HD-SDI uses digital video signal transmission, which can maintain the quality and accuracy of the original image and provide clearer and more detailed images.
Longer transmission distance: Due to the way of digital signal transmission, HD-SDI can maintain stable image quality over a longer distance, with transmission distances up to hundreds of meters, far exceeding analog high-definition technology and other transmission interfaces.
Lower latency: HD-SDI transmission latency is very low and can achieve almost real-time transmission, which is very important for application scenarios that require real-time monitoring.
Stronger compatibility: The HD-SDI interface is compatible with other high-definition equipment, without replacing existing equipment and infrastructure, saving upgrade costs.
Better stability: HD-SDI transmission signals are stable and reliable, not affected by interference and signal attenuation, and are suitable for application scenarios that require higher transmission quality.
Simplified wiring: Since HD-SDI uses coaxial cable transmission, wiring is simpler and more flexible, reducing the difficulty of installation and maintenance.
Development of HD-SDI technology
With the development of science and technology, technology is constantly updated and iterated. Of course, HD-SDI technology has also further developed to 3G-SDI, 6G-SDI and 12G-SDI. Their differences and connections are shown in the figure below:
|digital video format
|1.5 Gbit /s
|1.5 Gbit /s
|2.97 Gbit /s
|6 Gbit /s
|12 Gbit /s
|2160p60 (True 4K )
2160p60 ( True 4K)
According to the development of HD-SDI technology, Xuanzhan Technology has developed HD-SDI interface board, 3G-SDI interface board, 6G-SDI interface board and 12G-SDI interface board specifically for SONY FCB zoom camera blocks. Being connected to the interface board, the camera block can be controlled, video captured, converted, transmitted and image processed.
Keeping pace with the times and making continuous progress are inevitable requirements for us to cope with the rapid development of science and technology. Regarding the secondary research and development of SONY zoom camera blocks, Xuanzhan Technology has never stopped and will continue to innovate and strive to make greater contributions to the video transmission industry.