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Inevitable development trend of network cameras by guard summer
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Inevitable development trend of network cameras |
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Business,Electronics
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We know that the traditional SD monitor into analog, digital, and three types of networks. Analog front-end analog surveillance cameras, the rear end of a matrix. Front-end digital monitor is analog cameras, the rear end is DVR. There are two front-end network monitoring, an analog camera + video encoder, a network camera, the back-end is the platform. That is, in the era of standard definition monitor, front-end analog cameras, network cameras, video encoders + analog cameras and other types. Why is that the era of high-definition monitor, the front end must be HD network camera? The reason is mainly in two ways. First, high-definition monitor must be networked, but must be based video compression and transmission over an IP network, because the only way to control the cost of high-definition video transmission. After the acquisition of uncompressed HD video signals have both analog and digital transmission, transmission generally use the YPbPr component analog transmission, all the way to high-definition video signal requires three coaxial cable transmitted simultaneously. Digital transmission generally use DVI, HDMI or HD-SDI transmission, where the transmission distance of a few meters DVI or HDMI is not suitable for monitoring the transmission, although the HD-SDI can transmit about 100 meters, but high requirements for a coaxial cable the price of the cable is very expensive. Either analog or digital mode transmission, uncompressed high-definition video signal transmission costs are significantly higher than the previous analog standard-definition video signals. The use of video coding and transmission over IP networks, HD video and SD video differences in transport costs is small. The second point is the front-end processing directly with HD network camera is more efficient and cost advantages over high-definition video encoder + HD camera. At present, the main high-definition video sensor with CMOS, CMOS sensor output directly digitized video signal in the camera via DSP or ASIC digital high-definition video signal directly to this coding, and then transmitted to the network than the camera directly output HD signals more economical and higher efficiency. Currently, the safe city, the financial network monitoring and other projects usually self-built fiber network or local area networks 1000M bandwidth networks. This gigabit bandwidth resources, install 100 full-time at the front road 1080P HD network camera (even 4Mbps per channel footprint calculation), occupying a total bandwidth of less than 50%; if it is adopted 720P transmission bandwidth can also be reduced by half. This can effectively support the practical application of HD network camera. Although the domestic HD network camera market is in an initial stage, but it certainly is the future trend. Currently, the main application for high-definition network camera clarity with special needs industry, with the perfect high-definition network cameras and transmission equipment, lower costs, high-definition and high-definition network camera solution on the overall security monitoring applications will be more and more . Meanwhile, HD network camera with intelligent analysis capabilities will become a new bright spot. HD application is network-based video surveillance. Global survey data show that in recent years, the rapid growth of network monitoring market, while the market share of traditional analog surveillance products remained stable. There are people in the industry said that the limited current network monitoring operations in the overall security market share, not only with the development of the relevant monitoring market is not yet mature, but because there is no network monitoring decisive technical advantages compared with traditional analog products. Therefore, only high-definition technology to develop and solve the problem of the limitations of their development, in order to make high-definition video surveillance network to win the market. In fact, mature technical reserves IP cameras and network infrastructure is getting more complete environment, improve clarity in the application of technology and major obstacles do not exist, reflecting the people's pursuit of high-definition images. From a technical point of view we are developing for the future development trend of HD network camera technology decomposition. First of all, the camera will continue to increase the resolution, the resolution, the development of HD network camera can be said leaps and bounds, in addition to the current market has emerged more megapixels, 1.3 million pixels, 2 million pixels, the 3 million pixels , 5 million pixels, 8 million pixel products already on the market, or even tens and tens of millions more pixels product also began inklings in the surveillance industry. Secondly, COMS will gradually replace the CCD, with the development of technology, the performance of the CMOS sensor is rapidly improving. CMOS sensor response speed faster than CCD, and therefore more suitable for high-definition monitor large amounts of data characteristics. From a market point of view, the traditional manufacturers of CCD has begun to shift the focus of the CMOS sensor, in its production of HD network camera is almost exclusively employ a CMOS sensor, which may be seen as a stage of the CMOS sensor of victory. By integrating ISP, not only can significantly reduce system costs, more significantly enhance the stability of the video, optimized video performance in the optical area. This is to enhance the image quality for high-definition network camera has its important role. Now implemented in HD network camera or being implemented in the intelligent analysis capabilities include: video block with video loss detection, video conversion detection, video blur detection, video motion detection, access demographics, population movement and congestion identification, items left over recognition, intrusion identification and so on. These features seem intelligent analysis capabilities than in the past to be "inferior" much, but it is more practical. Whether ONVIF or PSIA, standards are voluntary organizations formed companies, but more and more companies get a response from their point of view, still has a very important significance. Next few years, will become the high-definition network camera standardization to the market permits.
Related Articles -
high-definition monitor, HD cameras, network camera,
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