At present, the security video surveillance is still using coaxial cable as a transmission medium close-signal transceiver; with the impact of IP-based TCP / IP protocol network transmission is increasingly been applied. But no matter what means of transmission, are unable to meet the transmission needs of modern security. Optical terminal equipment as a transmission medium, seem to become important in the transmission. Below I will examine each of your Road.

Application of mature

China's Optical accompanied by monitoring development of the industry development, from analog to digital, from digital to HD, a step-by-step way, after so many years of accumulated technology, has developed into a mature stage; Beijing frog communication technology Yao Zhihong, a limited liability company technical director, said: For now, the optical transceiver has been much technological breakthroughs, but could still be some special features in the subdivision application development and, system stability, capacity, etc. regular performance improvements, which is also Optical manufacturers tirelessly to seek a breakthrough in power.

Development restrictions

Stabilize the performance is top priority

Optical technology is quite mature on the occasion, many manufacturers have developers shift the focus of product performance improvements, the current Optical performance improved primarily from the following:

First, the development argue that single-mode optical fiber according to the light in which the transmission can be divided into multimode and singlemode. Single mode can completely avoid modal dispersion, the effect of transmission, less susceptible to interference, the transmission bandwidth, transmission capacity to adapt to large-capacity, long-distance transmission. Second, the modular and hybrid-access design, the flexible modular design, can provide scalable system development; with the trend of digital SDI technology integration, coexistence of different standard products to the manufacturer inconvenience, Therefore, in addition to modular design, the need to adopt a mixed-access design, RJ-45 Network Interface, BNC interface in the device, makes the same Optical can pass the analog signal can also access the network. signal. Rich Optical application form, the Chengdu Wadi digital series Liu Xueming the proposed anyaccesx technical solutions, the technology will enable greatly reduced to 1-2 sizes, the customer can be arbitrary access, fiber access point to facilitate Planning, Optical will no longer be the limit of point to point, node, ring, brought together, a product that is compatible with all access methods, thus greatly reducing the number of fiber use. Application multiplexing (EDM, TDM, WDM, the general term), mainly to solve the single fiber transmission capacity problems, especially the HD-SDI applications, bandwidth traffic can, such as multiplexing and wavelength division multiplexing available several times the capacity to enhance integration, multiplexing R & D is particularly important.

Optical platform smooth before

2011 Alexander Forbes will know: enterprises now provide a complete system solution for the evolution of the trend toward selling products to the Video Optical to the platform direction, so the video Optical transmission equipment and other equipment integration to form a unified system platform will be an inevitable trend in the future

Light platform for some time, light platform, on the one hand, the horizontal expansion of the capacity of the system, so that the access equipment used in optical fiber is a significant increase in the other hand, led to the integration of multi-service, Furthermore, also to ensure the quality of the transmission, the previous analog transmission of optical signals during transmission continuously through the AD / DA converters, resulting in the attenuation of the signal transmission delay and transmission, so that when you reach the end, the quality of the rendered image quality is not real-time, light platform, a good solution to this problem, simply call any digital image all the way to the port to do the DA conversion, without the flow of digital signal is still level on the wall, In this way, the whole process, only once the AD / DA conversion, reducing the loss of quality, real-time guarantee.

Total growth and high-definition

High definition has become the development trend of the security industry, as the transmission of messages, since outdone, have launched the the corresponding GaoQingGuang end machine products HD-SDI Optical Optical HD-SDI, HD video, HD-SDI long-distance optical fiber transmission, 2-way based on SMPTE259M/292M/344M standard uncompressed high-definition digital video signals and multi-channel audio transmission in a core single-mode core. But Shenzhen nandrolone Liu Xiaobin mentioned that radio and television and video surveillance application differences and the problem of high cost and high cost, making the development of HD-SDI video optical transceiver is not smooth. It is undeniable that the Optical follow the pace of development of the industry does not stop does not work, Optical manufacturers will be light and power, multiplexing technology, some hard work.

Development of the soft underbelly of

Although Optical has developed more mature, but there are still some bottlenecks: first, compatibility, various manufacturers given analog, digital conversion and transport protocol and standards are not the same, and if a open protocol, it is difficult basically did not approach manufacturers compatible; network traffic impact, the Wuhan minimally invasive optoelectronic our technical support department Dan Zhijun said: IP to monitor the development of Optical bring two opposite effects: a view both to integration rather than competition direction, the other is that, going along with the IP process, the Optical share in the entire security compare narrowing, Gigabit Ethernet applications and transmission flexibility so priority optical fiber transmission, such as to break the transmission limit, replace the optical transmission will become a reality, and this brought great challenges to the optical transmission.

Although Optical, there are some technical difficulties, but its advantage is irreplaceable by other technologies, Optical are now working to upgrade to the device network management, multi-service and reliability in the long period of time will transfer the main. The so-called roads large and medium-sized Rome, a kind of optical transmission is just one of many transmission, endless development through the bottleneck of the breakthrough technology, we also look forward to the future more and more sophisticated transmission technology or a variety of transmission technologies complement each application program, jointly the benefit of security.