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  • HD, illumination, intelligent network surveillance camera development trend


        Network surveillance camera is a major theme of the video surveillance. On the one hand, the rapid development of electronics, network technology greatly enhance the value of its application and scope of application; the other hand, the rapid expansion of the global security needs, as well as users increasingly use also greatly stimulated the development of network surveillance cameras.
        But it does not mean it can connect to the Internet is a network surveillance cameras. Network surveillance cameras are divided into two categories, one is the front-end analog CCTV cameras, plus a combination of video processing and network transmission module modulus of the hybrid network camera; pure digital network cameras. Both the fundamental difference is that the former is essentially analog mini ip camera, its implementation mechanism of the A / D-D / A-A / D that after two analog to digital conversion, and ultimately the formation of the network signal, the highest quality can not exceed D1. Latter mechanism from the A / D analog signal directly to the network signal, thus greatly improving the conversion efficiency, and thus greatly improve the quality and quality improvement to reduce the snow noise pixels high, but occupied by the code stream the contrary, its network applicability better. Monitor in the digital era, as people gradually increase the monitoring requirements, the network camera toward HD, intelligent direction, paper mainly discusses the network camera within the next few years the development trend in the technology sector.
        1, high-definition into the most basic needs
        In the era of analog control, users of the fuzzy screen covered with snow noise already complain incessantly, but can not do anything, because the market the best ip camera can do D1, pixels, in theory, only a maximum of more than 40 million. In the field of non-security, but it is omnipresent digital camera, camcorder, PC camera, cell phone camera, hundreds of millions or even tens of millions of pixels. That has value.
        Commonly used CMOS Sensor Built-in AD converter, the optical signal into digital signal output, to avoid repeated AD conversion, quality, damage to small, but also in the color reproduction signal anti-jamming performance.
    Front-end photographic output analog signals for analog cameras, and then converted into digital signals for color and luminance processing, and then then the digital signal into an analog signal output. When you reach the DVR and other back-end equipment, video capture chip (such as: 7130,6805) the analog signals into digital signals, a total of three times of AD conversion, the picture is severely damaged when the composite video transmission to the video capture chip When the video capture chip to do the AD conversion, we need to do the bright separation (toiletry filter) is impossible to completely separate the luminance and color signals, traditional analog video surveillance easy color penetration and variegated phenomenon.
        2, illumination Accelerating the adoption of a firm pace
        With the range of applications dedicated to increasingly civil, surveillance ip camera in the field of security monitoring is more extensive monitoring conditions are poor, dimly lit places also require the installation of a versatile camera, especially in low-light camera. In addition, in order to meet the monitoring requirements of 24 hours a day, a new type of camera become the new darling of the surveillance market. Received photon number of the less, along with the low light performance is worse, so many people hundreds of thousands of pixels, analog cameras Ibid megapixels network digital camera for low-light contrast, and mistakenly believe that the illumination is the soft underbelly of the digital network cameras.
        Now, low-light high-definition network camera, this camera uses a combination of Plus technology, in a poor control environment, the illumination effect is far more than the analog cameras, they also have a prominent advantage that ordinary cameras at low illumination conditions, after the fading of the color picture into black and white images, this product in low light is still showing a color image, whether static images or dynamic images, can demonstrate a strong sense of hierarchy, true color reproduction and less noise. no smearing advantages. Industry experts believe that improved low light performance will accelerate the pace of the popularity of high-definition network camera to speed up the process of high-definition monitor era.
        3, the intelligent improve monitoring efficiency
        Traditional monitoring is the lack of interaction between the defensive monitoring, man and machine, intelligent monitoring change this situation, the change from passive to active, intelligent technology to timely, automatically extracted from the raw video information and a wealth of useful information, completion of the video transmission to save and retrieve, you can also drive other programs running other intelligent behavior. The advantages are obvious: the all-weather reliable monitoring to improve alarm accuracy and fast response.
        Intelligent monitoring to identify the behavior and the type of operation command, data and information from complex data analysis, enabling the alarm, drawn attention to the intelligent retrieval intelligent behavior. If the traditional video surveillance is an ex post means to search for the suspect, then the intelligent monitoring is a way to stop the crime occurred aids, and thus greatly enhance the monitoring efficiency. Moreover, the smart device can selectively transmit video, thus saving bandwidth, which greatly improved the available network bandwidth. Today, intelligence monitoring has become an important theme for monitoring technology development and market demand.

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