The node optical transceiver realizes the remote signal transmission. The road monitoring system needs to access the camera controlled by the PTZ after a certain distance. It needs a video and a reverse control signal. In some places, it may be necessary to change the information board, vehicle detector data signal, and weather. Monitor data signal. If it is a tunnel, the number of cameras in a short-distance tunnel is not too large. A video can be used to transmit video to the center and a long-distance tunnel. We can divide the cameras into groups of 6-8 and transmit the video in a centralized or direct manner.
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Comprehensively solve the video transmission problem of the road management sub-center. The core idea of ​​the scheme is that the whole system structure is link type. It refers to the insertion of a core fiber into multiple nodes. There are multiple transmitters on the same fiber at the far end. There is only one receiver in the center, and the digital uncompressed optical transceiver is used. Real-time transmission, but the video is only digitized once during the whole transmission process, all nodes are carried out in the digital domain, ensuring that the video quality is exactly the same as the digital uncompressed point-to-point transmission. The center can realize the operation of the central machine to the remote machine through the network management software. Real-time feedback.
The characteristics and advantages of the node optical transceiver:
1. Full-range digital uncompressed video transmission, the video quality is high, reaching the broadcast level, and the digital uncompressed point-to-point transmission image is completely consistent.
2. Full real-time transmission, no delay in compressed image transmission.
3. Wide application range and strong adaptability. It can adapt well to the transmission of concentrated images and scattered images.
4. The scalability is good, and the number of image paths is very convenient.
5. Save fiber resources, greatly save the number of fiber cores and facilitate management and maintenance than point-to-point transmission system.
6. Cost-effective, greatly saving construction costs compared to the ring network transmission system using compressed video.
7. High reliability, with node power off optical link protection function, power failure of a node will not affect the transmission of the remaining nodes.
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