The function of SDI interface of industrial display

The function of SDI interface of industrial display

In the industrial display industry, to achieve various functions, various interfaces are necessary. Different interfaces can achieve different functions and play an important role in different application scenarios. Among them, SDI (Serial Digital Interface) is an interface dedicated to the transmission of digital video signals. It is widely used in broadcasting, security monitoring, medical imaging and industrial automation. Because this interface has high resolution, long-distance transmission and anti-interference ability, it is particularly suitable for complex industrial environments.

Main types of SDI

There are many types of SDI. SD-SDI supports standard-definition video transmission and is often used in earlier industrial monitoring equipment. HD-SDI supports 720p and 1080p high-definition signals and is suitable for high-definition monitoring and display equipment. 3G-SDI supports 1080p60hz full-HD signals and is widely used and suitable for most industrial scenarios. 6G-SDI supports 4K resolution for higher resolution display needs. 12G-SDI supports 4K resolution and is suitable for ultra-high-definition broadcast and high-end industrial monitoring needs. 24G-SDI is the latest SDI standard, supporting 8K resolution, and is the future development direction of high-precision image transmission.

Advantages of SDI

1. Long-distance transmission. Different versions of SDI interfaces can achieve data transmission of 50-150 meters without the help of relay equipment. Beyond these distances, the signal will attenuate, frame loss, picture distortion and other problems, so a professional long-distance transmission solution is required

2. Strong anti-interference ability. SDI (Serial Digital Interface) is widely used in broadcasting, security, medical and industrial automation fields due to its high anti-interference ability and long-distance stable transmission characteristics. Compared with analog signal interfaces (such as VGA) or other digital interfaces (such as HDMI), SDI interfaces are more stable in environments with strong electromagnetic interference (EMI) and radio frequency interference (RFI). This is mainly due to the use of differential signal transmission in SDI, which can effectively resist electromagnetic interference and is suitable for complex electrical environments in industrial environments.

3. Low latency. SDI can be transmitted without compression. The SDI interface transmits uncompressed digital video signals without the need for encoding and decoding, which greatly reduces latency. SDI has the characteristics of strong real-time performance and can transmit video signals quickly and synchronously. It is suitable for broadcasting live broadcasts, medical imaging and other scenes that require real-time monitoring and feedback.

Application scenarios of SDI

1. Industrial monitoring and security systems. Suitable for high-definition monitoring and video wall systems for urban monitoring, intelligent transportation and command centers. Used in high-definition monitoring systems for large factories, mines and workshops to ensure the stability and real-time performance of video transmission.

2. Medical equipment. Used for high-precision video signal transmission in medical imaging systems, such as operating room monitoring and endoscopic imaging.

3. Broadcasting systems. Widely used in TV stations and live broadcast systems to transmit high-definition and ultra-high-definition broadcast signals.