What is SDI VIDEO SFP fiber optical module? What is it for? SDI SFP fiber optical module is also called digital video fiber optical module or SDI (Serial Digital Interface) fiber optical module, and its main function is to support SDI video pathological signal of SDI equipment. The SDI SFP fiber optical module is used to provide video transmission and is used in HD-SDI optical transmitter and receiver. As we all know, video transmission is different from data communication. The fundamental difference is that the video is transmitted in a one-way manner. This means that the video link may only transmit optical or electrical signals. Therefore, the SDI SFP fiber optical module can have two fiber optical transmitters, Two fiber optical receivers or fiber optical transmitter and fiber optical receiver are integrated.
1. What is a digital video SDI interface
The SDI interface is an acronym for serial digital interface. It is an interface type and a digital video interface standard developed by the SMPTE organization. The SDI interface can be roughly divided into SD-SDI (270Mbp, SMPTE259M), which is standard definition. HD-SDI (1.485Gbps, SMPTE292M), which means high definition. 3G-SDI (2.97Gbps, SMPTE424M), which means super definition supports 1080P And digital cinema and other more advanced image quality of these three. The current highest rate digital product is 7K-SDI.
2.Video SFP fiber optical module classification
According to the rate, it is divided into HD-SDI,3G-SDI, 6G-SDI,12G-SDI; 2.97G is also called 3G, corresponding to the SMPTE-424M standard,supporting FULL HD full HD 1080P. 1.485G is also called 1.5G, which is HD-SDI, Corresponding to the SMPTE-292M standard, supporting 720P. 3G-SDI is an upgraded version of HD-SDI, supporting more advanced image quality such as 1080P and digital cinema.
According to the different working wavelengths, they can be divided into four types, 850nm, 1310nm, 1490nm and 1550nm.
According to the different types of transceivers, SDI SFP fiber optical modules can be divided into five types,single reception, dual reception, single transmission, dual transmission and integrated transceiver.
According to the package, it can be divided into single-transmit and single-receive Video SFP fiber optical module (high-definition SDI optical transmitter and receiver for 1 channel of pure video), dual-transmit dual-receive Video SFP optical module (high-definition SDI optical transmitter and receiver for 1 channel of pure video), 1.5G or Video SFP optical module with 3G and 155M asymmetric rate (used for high-definition SDI transmitter and receiver with reverse control data).
3.Video SFP fiber optical module application
Video fiber optical module transmission is one-way, and there is only one video transmission link, which can only transmit optical signals or electrical signals, unlike ordinary fiber optical modules that can carry out two-way transmission. Video fiber optical modules are generally used in video transmission. They are used in conjunction with SDI transmitter and receiver to prevent flickering and black screens during high-definition image transmission. They are widely used in the following scenarios,
1. High-definition shooting, such as animal shooting, movie shooting.
2. The field of high-definition digital broadcasting.
3. Live broadcast of large-scale sports events.
4. TV station studio.
5. In the 1080 PHD monitoring field, reverse control data can be brought.
4.How to buy Video SFP fiber optical module?
When purchasing, be sure to choose products that have passed the SDI sickness code test. Because products that have not passed the SDI pathological code test are likely to have problems when transmitting signals with irregular bit rates, for example, the probability of problems at 1.5G rate is low, and the probability of problems at 3G rate is higher. The main performance is Flicker, black, blue screen appears during HD video transmission, or continuous and smooth playback of the screen cannot be guaranteed.
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