Security video surveillance technology innovation is essential

The matrix is ​​the core component of the video surveillance system. Its basic function is to switch the video image from any input channel to any output channel output. The appearance of the matrix is ​​because the scale of the video surveillance system is gradually expanding, the video source is gradually increasing, and the one-to-one display is impossible. The matrix must be used to solve the display, switching, viewing, and sharing of a large number of video images. The application of the matrix in China's video surveillance system has been used for more than ten years. With the continuous updating of science and technology and the continuous development of market demand, the matrix is ​​constantly changing and improving.

In accordance with the different ways to achieve video switching, mainly can be classified into two categories, namely, analog matrix and digital matrix. Analog video matrix video switching is done at the analog video layer. The signal switching is mainly realized by a single-chip microcomputer or a more complex chip-controlled analog switch; the digital video matrix, ie video switching, is completed in the digital video layer. The core of the digital matrix is ​​the processing of digital video. It is necessary to add AD conversion at the video input, change the analog signal to a digital signal, increase DA conversion at the video output, and convert the digital signal to analog signal output.

Simulation matrix brilliant no longer?

The simulation matrix has been introduced for more than 30 years so far. As the core product of the monitoring era, there have been countless glories. However, with the development of video surveillance technology in the direction of digitization, high-definition, and networking, the space for matrix products that originally occupied the market for analog video surveillance began to become insufficient. At one time, when network surveillance products began to sweep away the video surveillance market, many traditional contractors, users, and even some manufacturers all agreed that the analog matrix will gradually decline in the trend of high-definition Xishan. In particular, with the advent of video management and storage devices such as DVRs and NVRs, matrix models with traditional working methods and single processing capabilities are being squeezed by difficulties. In general, the drawbacks of analog matrix are mainly reflected in the following aspects:

The limitations of the monitoring range: For the history of the monitoring matrix, there is not much span requirement for the initial security monitoring, and there is no habit of large-scale application like today. Therefore, the use environment of the monitoring matrix is ​​more of a small and medium-sized environment with a limited area. Even today's city-level monitoring, which has not become difficult, has reached the limit for matrix performance and transmission equipment.

Single capacity expansion: In the current security monitoring system, the complexity brought by the expansion of the monitoring environment is a big test for the equipment. For the simulation matrix, due to the fixed core model, it is almost impossible to increase the capacity for it. This is clearly an unbearable fact for today's ever-changing monitoring needs.

In addition, the adaptability of the simulation matrix is ​​almost zero in the upgrade capability, which undoubtedly further accelerates the rejection of the analog matrix in the era.

For DVRs, it is almost impossible to parry: the analog surveillance matrix may be the absolute mainstream in surveillance systems a decade or two ago. However, with the straight-up development of monitoring technology, with the particularity of the monitoring industry and the improvement of the applicability requirements. The market has already turned to DVR equipment that is chasing the pace of the times. However, for the analog monitoring matrix, I am afraid that only the current sigh is not the same.

Can a digital matrix return to its peak?

In recent years, with the development of digital video compression technology, digital products have also started a large number of test areas for video surveillance, and have also achieved a lot of success. The digital matrix device also broke into the user's field of vision at this time. At first, many people looked forward to the digital matrix. After all, relying on the most current technology, the re-emergence of the digital matrix has also become the expectation of many people.

Different from the analog matrix, the digital matrix is ​​mainly composed of a video encoding and decoding device and a management software platform. The network is a video switching platform, and the switching between the input video and the output video is performed in a packet exchange manner. In fact, more precisely, the digital matrix is ​​more like a digital monitoring system composed of a camera, codec equipment, management platform and transmission equipment than traditional analog matrix. Functionally, it also increases the capacity for capacity expansion, configuration flexibility, and distributed work. Obviously, people have already realized many problems of the traditional analog matrix and have made significant changes.

However, due to the shortcomings of the front-end camera, low compression rate, high equipment costs, and immature digital applications, the digital matrix did not wait for its summer. People's initial expectations were once again poured into cold water.

With the popularity of HD in the security industry, the development of the digital matrix has been hindered, mainly including network delays, large encoding and decoding losses, etc. Of course, these resistances must be removed to enable the digital matrix to be upgraded and will not be eliminated by the market. In this regard, we began to carry out various improvements.

In the field of matrix, the stability of the product is very important, and it is also the basis of the entire system. Moreover, the matrix is ​​modularized, each function can be made into a card, and the user can insert a corresponding card on the main board according to different requirements. The modular design of the matrix product improves the stability and reliability of the product as a whole, and ensures the scalability and maintainability on the hardware and the single-board plug-and-play, which can meet the input and output expansion of massive video signals in the project. , Make the matrix more powerful in various large and medium-sized security areas. The modular design and standardized design of the interface protocol bring great convenience to maintenance and upgrade, and it is easy to adapt to future services.

Modularization is not entirely without weaknesses. Modularization results in a large number of internally connected nodes. These nodes are prone to poor connectivity and increase maintenance costs. Therefore, in the end, the stability of the high-grade components of the product should be improved according to the user's use environment, so that when the product is designed, higher-level components are also required, and the cost is also increased.

In the future, the video matrix will be developed in the direction of high-definition, integration, and platformization.

Looking back at the past and looking forward to the future, the high-definition, integration, intelligence, and platformization of the video matrix function will become a trend.

First of all, as mentioned earlier, since the transmission mode of the current video signal is diversified, the matrix as a switching device for the video signal at the convergence point of the monitoring center must be compatible with a variety of signals, as well as network signals and other such as SDI/ Cable access signals such as DVI/VGA/CVBS have a big difference in processing methods. Therefore, a variety of signal processing modules need to be designed, and the functions of the matrix are becoming more diverse.

Secondly, modern surveillance systems are becoming larger and larger, and the number of video channels is increasing. This raises higher and higher requirements for the integration of devices such as matrices, and raises the need for system integration. The requirements that lead to the diversification of the functions of a single device, many matrix products currently integrate large-screen splicing and codec functions into the system is a good example.

Finally, and at the same time, the most important point is that the development of safe cities, smart cities, and Internet of Things technology has made video surveillance systems provide only clear, controllable images from the early days to more and more user-oriented actual needs. For various business processes and intelligent application development. The needs of users have also evolved from the early need for clear and usable video signals from machines and equipment to the need for machine equipment to provide more practical applications on the basis of raw video signals; in the face of ever-increasing amounts of equipment and information, users are increasingly Many need to use intelligent applications, use machines instead of manpower to process information, artificial intelligence can identify, statistically, inductively, and excavate information, assist users to make decisions, get rid of the past such as artificial video inspection, monitoring, equipment Maintenance and other such heavy physical labor. As a result, the matrix has also shifted from providing only raw video signals and switching functions to providing more upper-layer applications in the early days, loading more application requirements on the basis of providing video signal exchange and transmission, thereby prompting the development of matrix platforms.

The current matrix is ​​at a crossroads, but it is by no means a decline. As a veteran monitoring and management technology, technological innovation is essential if self salvation is to be achieved. Only constantly follow the updated technology and continue to cater to higher application tastes. The matrix will not fall under the sea in the impact of a technical boom.