Network camera constantly develop derivative product type

Network camera constantly develop derivative product type
At this stage, megapixels network camera to bolt and hemisphere -based, but as the technology matures and user needs increasingly clear , network camera will also be derived million HD network dome camera . As in remote or network monitoring system is not easy to build a network environment , in order to achieve the effect of high-definition , high-definition wireless network camera through to solve the problem of terminal access .
The improved algorithm into a trend
Core technology network camera is its video encoding compression technology. The current network cameras include general-purpose DSP chip technology and ASIC chip technology are two implementations . Due to domestic users for bandwidth and frame rate requirements more sensitive , requiring low bandwidth transmission rate of 25 still meet , so the algorithm for MPEG-4 H.264 algorithm , especially great in the domestic market . H.264 compression algorithm is 2-3 times more than the MPEG-2 , MPEG-4 is a 1.5 to 2 times . Therefore, the optimization of the H.264 algorithm manufacturers have much room for improvement to meet customer demand for bandwidth is occupied . In addition, the megapixels camera application H.264 encoding is the future direction of development, but now the situation is different each algorithm, compression quality, and the effect is different, more important is the resolution of the camera now supports 1920 × 1080P has come out, but at the same time almost no support 25ips manufacturers are now able to do 720P @ 25ips has been pretty good , so this is the future trend of development.
Infrared light to improve performance relative to ordinary HD IP camera sensor chip , the same size as a multiple of pixels increases , the resulting reduction in the size of the corresponding multiples sensitive point , so under the same exposure conditions , relative to the normal pixel HD camera network camera low light performance will be a lot worse. This means that if the night is much higher intensity of infrared fill light needs than ordinary pixel HD camera infrared camera . For example, a 1.3 million pixel 1 /3 " HD size CCD, with respect to the 430,000 pixels ( 480 lines ) 1 /3" size of an ordinary CCD, pixel high-definition CCD unit area is three times the normal CCD , the HD CCD pixel CCD photographic performance compared to ordinary sensitivity 1 / 3 , which is the HD camera the night of the root causes of poor results . Current practice is to extend the exposure time to compensate for poor low light performance deficiencies , but this will cause the image prone to smear phenomenon . If the high-definition image quality is much better at night , it can only increase the ambient illumination to supplement this regard.
For HD fill light , the HD camera infrared light to monitor different distances have different options to configure . Wide angle close- choice LED light board to fill light , wide-angle monitoring can be achieved at a lower cost , long-range due to the need for fill light intensity is relatively large , the angle is small, the use of ordinary LED difficult to achieve the desired effect. Therefore, in the distance with a strong directional selection , energy focused laser infrared light to fill light.
Usability improvements
Different from the traditional analog cameras ,megapixels ip camera comes to IT category , therefore , network cameraand analog cameras in use there is a large difference , especially for the operator and the use of personnel have higher requirements . For most domestic contractors, integrators and users, their traditional CCTV system is very familiar with the early stages of network cameras still in use , so the network camera in the development and design , taking into account the characteristics of these people , in the convenience and ease of use have installed on fully reflected , for example, supports PoE power supply, local video output , as well as convenient local debugging , support wireless functions.
Actively promote the high security
The basic definition of the term is accompanied by the start of high-definition television , became popular many years ago . However, for the surveillance industry , real large-scale application is a recent one or two years , which is mainly the rapid development of monitoring technologies, including coding technology, network technology , transmission technology , storage technology, high-definition monitor as possible, the overall technical program gradually mature, gradually being accepted by users ; of course , the user monitoring needs change , pushing for HD also played a positive role.
Shanghai Pudong District HD video coverage project is a typical representative. The project is currently the largest single cut definition video surveillance project , is currently the world's largest high-definition monitor projects. This project has more than one thousand monitoring points , large-scale adoption of HD technology , becoming the first Chinese surveillance market a veritable large HD monitoring project for the promotion of the development of high-definition played a positive role , a milestone .
Compared with the standard definition , whether it is from the resolution , display or fluency , the HD than SD advantage. From the resolution point of view , 720p resolution CIF resolution is 9 times , 1080i/1080p CIF resolution is 20 times the resolution of the display in the same environment , will be much clearer definition . From the display , the HD supports both large-screen display , and support for 16:9 widescreen display , you can greatly enhance the user's viewing experience. From the fluency of view, HD support higher frame rates , such as 1080i/1080p can support 720p and 60 frames / sec or 60 fields / sec , and its standard-definition images fluency than twice as high . Therefore , high-definition monitor is one of the most mainstream monitoring industry trends , as acquisition front-end , high-definitionnetwork camera trend is also moving along .
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