The security industry has developed rapidly over the past few years. Although many small partners do not know what analog surveillance is, they have made the network high-definition monitoring transparent.
A lot of security people lamented that they could not keep up with the pace of product changes, but also lamented the huge impact brought by changes in business models and marketing methods.
Today we talk about the products and technologies that have been sturdy but are now gradually exiting the security arena and are rarely seen:
Analog camera CCD
The most important thing in the security system is monitoring. The core product of monitoring is the camera. The most critical thing for the camera is the image sensor. That is, we often say CCD/CMOS.
I remember that before 2010, CCD took the lead in the security market. Although there were only 420 lines and 480 lines at that time, it would be hundreds of thousands according to the current pixel. But at the time, there were always many criticisms on the application of COMS cameras in the field of security. They are always the symbol of low-end products. Their main performances are high illumination, noise, and other drawbacks. Our common application is to use the QQ camera and get familiar with it. Haha.
Old security people should be very familiar with the following diagram:
However, in recent years you have rarely seen a CCD camera in your security system, because he not only solved the problem of low light level, but also made great progress in pixel definition, and its price is cheaper and integrated. Higher, system customization developed quickly.
Screen divider, switcher
The earliest one to remember is that the earliest one used was the ROBOT 16 screen splitter.
Long time delay video recorder
This is really not seen. I also installed several units in 2000. Panasonic 24-hour long delay recorder + multimedia matrix, to achieve multiple switching video. Think about how far away it is, haha.
Monitor video capture card
Once in the analog era, a PC motherboard + video capture card + software + IPC chassis perfect combination into a set of digital hard disk recorders, how tall products at that time. It is also rare to see it now.
In the years since 2002, video capture cards have become prevalent, and Conax Card (Hikvision), Dejiala, Hanbang, and Chengfeng, and a large number of capture card manufacturers have rapidly emerged. (Below figure is familiar with it)
By around 2005, computer hardware has become faster and more CPU-intensive, with more and more memory, and soft press cards are quickly occupying a market.
At the same time, since 2005, embedded hard disk recorders have also begun to be equipped with important security sites such as banks. After 2008, I rarely saw projects that use video capture cards to make hard disk video recorders.
Now a cheap four-way eight-channel embedded hard disk recorder, a hundred dollars, video capture card to play? Quickly put away, take it out when it's okay, take a look and sigh. Haha!
Twisted pair transmitter:
About this we can look at a previous article. Twisted Pair Transmitter, a thing that survived all the time! It has also withdrawn from the stage of history.
Surveillance video anti-jamming device:
In the analog surveillance era, signals were transmitted over coaxial cables. Analog signals are particularly vulnerable to various external disturbances. Such as power low frequency, wireless signal and so on. This is also what we often discuss: Can my power cord wear a PVC tube with the video cable? How suitable is the distance between the video cable and the power cable in the weak electric well? And so on a series of questions about analog monitoring interference.
Ever since, video jammers came into being.
As for how to apply, we will not discuss it here. In fact, in the simulation of the era, we all know it. It will be enough to meet you. To be honest, it is not easy to buy now. Haha.
Video Optical:
Many people think that it is unbelievable to say that this is going to quit the stage. However, from the perspective of the development of online video in the past two years, and with a lot of the original dealers to do surveillance video chat, from the shipment, this should be a matter of time. That is the oldest class of remote transmission products in the analog surveillance era. Hey.
Some products launch the stage,
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