[ Huaqiang Security Network News ] It is understood that when the HD monitoring system is applied, the functions of each part are different. In the security industry, a complete security monitoring system can be divided into seven levels. Which specific level? Let's analyze it for everyone!
First, the performance layer <br> The performance layer is the most intuitive we feel, it shows the quality of the entire security monitoring system. Such as monitoring video wall, monitor, treble alarm horn, alarm automatic answering phone, etc. belong to this layer.
Second, the control layer <br> control layer is the core of security monitoring system, which system is most clearly reflected in the level of science and technology. Usually we have two control methods - analog control and digital control. Analog control is an early control method. The console is usually composed of a controller or an analog control matrix. It is suitable for small local security monitoring systems. This control method has lower cost and lower failure rate. However, for medium and large security monitoring systems, this approach is complicated and does not have any price advantage. At this time, our more sensible choice should be digital control. Digital control is the control core of the industrial computer as the monitoring system. It transforms the complex analog control operation into a simple mouse click operation, and reduces the huge analog controller stack to an industrial computer, which will be a complex and large number of control cables. Become a serial phone line. It turns mid-remote monitoring into a reality and provides the possibility for remote monitoring of the Internet. However, the digital control is not so perfect, the price of controlling the host is very expensive, the module is wasted, the system may have a crisis of full-line collapse, and the control is lagging behind.
Third, the processing layer <br> The processing layer may be called the audio and video processing layer, it will have the audio and video signals sent by the transmission layer to be distributed, amplified, segmented, etc., organically connect the presentation layer and the control layer. Audio and video splitters, audio and video amplifiers, video splitters, audio and video switchers and other devices belong to this layer.
Fourth, the transmission layer <br> The transmission layer is equivalent to the blood of the security monitoring system. In the small security monitoring system, our most common transmission layer devices are video lines and audio lines. For medium and long-range monitoring systems, we often use RF lines and microwaves. For remote monitoring, we usually use the Internet. A cheap carrier. It is worth mentioning that the emerging transmission layer medium - network cable / fiber. Most people have a misunderstanding in digital security monitoring. They think that the digitally controlled security monitoring system used by the control layer is the digital security monitoring system, but it is not. The transmission medium of a pure digital security monitoring system must be a network cable or fiber. When the signal comes out of the acquisition layer, it has been modulated into a digital signal. The digital signal runs on the mature network. In theory, there is no attenuation, which ensures the lossless display of the remote monitoring image. This is impossible for analog transmission. Comparable. Of course, high-performance returns also require high-cost investment, which is one of the most important reasons why pure digital security surveillance systems cannot be popularized.
V. Execution layer <br> The execution layer is the command object of our control instruction. At some point, it is not completely separated from the support and acquisition layers that we will talk about later. We think that the controlled object is the execution layer device. . For example: PTZ, lens, decoder, ball, etc.
Second, the control layer <br> control layer is the core of security monitoring system, which system is most clearly reflected in the level of science and technology. Usually we have two control methods - analog control and digital control. Analog control is an early control method. The console is usually composed of a controller or an analog control matrix. It is suitable for small local security monitoring systems. This control method has lower cost and lower failure rate. However, for medium and large security monitoring systems, this approach is complicated and does not have any price advantage. At this time, our more sensible choice should be digital control. Digital control is the control core of the industrial computer as the monitoring system. It transforms the complex analog control operation into a simple mouse click operation, and reduces the huge analog controller stack to an industrial computer, which will be a complex and large number of control cables. Become a serial phone line. It turns mid-remote monitoring into a reality and provides the possibility for remote monitoring of the Internet. However, the digital control is not so perfect, the price of controlling the host is very expensive, the module is wasted, the system may have a crisis of full-line collapse, and the control is lagging behind.
Third, the processing layer <br> The processing layer may be called the audio and video processing layer, it will have the audio and video signals sent by the transmission layer to be distributed, amplified, segmented, etc., organically connect the presentation layer and the control layer. Audio and video splitters, audio and video amplifiers, video splitters, audio and video switchers and other devices belong to this layer.
Fourth, the transmission layer <br> The transmission layer is equivalent to the blood of the security monitoring system. In the small security monitoring system, our most common transmission layer devices are video lines and audio lines. For medium and long-range monitoring systems, we often use RF lines and microwaves. For remote monitoring, we usually use the Internet. A cheap carrier. It is worth mentioning that the emerging transmission layer medium - network cable / fiber. Most people have a misunderstanding in digital security monitoring. They think that the digitally controlled security monitoring system used by the control layer is the digital security monitoring system, but it is not. The transmission medium of a pure digital security monitoring system must be a network cable or fiber. When the signal comes out of the acquisition layer, it has been modulated into a digital signal. The digital signal runs on the mature network. In theory, there is no attenuation, which ensures the lossless display of the remote monitoring image. This is impossible for analog transmission. Comparable. Of course, high-performance returns also require high-cost investment, which is one of the most important reasons why pure digital security surveillance systems cannot be popularized.
V. Execution layer <br> The execution layer is the command object of our control instruction. At some point, it is not completely separated from the support and acquisition layers that we will talk about later. We think that the controlled object is the execution layer device. . For example: PTZ, lens, decoder, ball, etc.
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