Analysis million core technology of HD IP Camera

Analysis million core technology of HD IP Camera
HD era of video surveillance has come

In 2010, the video surveillance industry into the "HD Era", emerging high-definition monitors around the project mushroomed. In 2011, the Wuhan city video surveillance system project construction complete municipal HD monitoring point 5000, follow-up will continue building a high-definition monitor point 20000; 2012, Quanzhou start the investment and construction of the 8000 high-definition monitor points, Changsha started to invest in the construction of 30,000 The eye works "HD monitoring point, the Guangdong Public Security Bureau to start construction during the period from 2012 to 2014 in the province-wide, 960,000 high-definition monitoring points.
The HD quick start monitoring market, directly contributed to the high-definition monitor product improvement and technology upgrades, the major monitor manufacturers in response to changing user needs, different HD monitoring solution introduced in different stages of development, can be roughly divided into three generations.

First-generation high-definition surveillance system
In 2000, monitoring the digitization process accelerated gradually to reach a consensus in the industry on the digital, networked, intelligent "monitoring technology trends,IP Camera, however, has been difficult because of the image quality, delay, price and other factors the market accepted, this situation began to change in the first-generation high-definition surveillance system until 2006.
The first-generation high-definition surveillance system, mainly by megapixels camera and video management software suitable for small and medium-scale monitoring sites. Compared to traditional analog surveillance systems, the first-generation high-definition surveillance system image clearer, wider coverage, the same surveillance area can replace the original multiple fixed point camera or omnidirectional camera.
Has certain advantages, but the first generation of high-definition surveillance system for the development of small and medium-sized monitoring sites able to access high-definition video channels, transmission, storage, display, control and other related aspects are also not able to form a complete solution, but can not meet the access needs of highway, Safe City and other large professional video monitoring system. Even for the small and medium-scale monitoring sites, although the image quality is improved, but did not produce a qualitative leap, and the cost is also high, therefore, the first generation of high-definition surveillance system in the domestic market has been difficult to open up the situation.

Although the early days of marketing is not accepted by the market, large-scale applications is difficult, but the launch of the first generation of high-definition surveillance system, and has laid a good foundation for "high-definition monitor, to promote the industry's concern for" high-definition monitor, follow-up "HD monitoring booming played an indelible role.
Second-generation high-definition surveillance system
The second-generation high-definition surveillance system came into being with the of matures HD IPC, HD codec, HD Optical, NVR, IPSAN equipment and high-definition monitor market quick start.
In 2009, the Ministry of Public Security has issued "red light running automated recording system general technical conditions" image clarity, higher demands, general technical conditions "of the" road vehicle intelligent monitoring and recording system, the Road Traffic Safety the illegal image forensics technical specifications " motor vehicle license plate automatic image recognition technology specification "standard. In December of the same year, the Jiangsu Provincial Public Security Department launched the "320 project", the project plans to build a road in the Jiangsu province-wide monitoring network across the province, the city's roads every three kilometers to establish a vehicle monitoring capture point, other roads front-end equipment set up a monitor capture point every 20 kilometers, the project will invest 954 million, the entire project investment of nearly 20 billion.
Finalist stage of the project in the equipment, the front of the camera to make a minimum of 200 million pixels requirements, the news came out, created quite a stir in the industry, major monitor manufacturers competing to come up to solutions for public security needs of various types of high-definition monitors, over a period of time integration, improve, and gradually form a second-generation high-definition surveillance system that can meet the needs of large-scale monitoring system.
The second-generation high-definition monitoring system compared to the first generation of high-definition surveillance system has the following advantages:

Second-generation high-definition monitoring system consists of a HD IP Camera, transmit, display, storage and all other aspects of equipment, every aspect of the device are developed for large-scale monitoring system, the system is more comprehensive, more stable performance;
The second-generation high-definition surveillance system provides 1080P HD video image clarity than the 720P has greatly improved;
Second-generation high-definition surveillance products based network monitoring, effective in the formation of large-scale monitoring system;
The second-generation high-definition surveillance system managed by visualization platform management software.
The second-generation high-definition surveillance system for the user unprecedented HD experience directly stimulate the market demand, in 2010, and law and order throughout the bayonet and electronic police project began large-scale second-generation high-definition surveillance system, high-definition monitor market began into the high-speed development stage, therefore, the industry these a year as the the "HD first year.
Third-generation high-definition surveillance system
In the past two years, the second-generation high-definition surveillance system to enter a stage of rapid development, many large Safe City project began large-scale use of second-generation high-definition surveillance system construction, but subsequently also exposed in the mass-market applications, on the wall image prejudicial, PTZ manipulation delay range of problems can not be solved in the short term, and thus promote the HD-SDI technology in the surveillance industry.
People can not let go of both the original analog control system, second-generation high-definition or HD-SDI, has been found to use in a variety of systems.
Original analog control system has not yet reached the useful life of many outlets are still in use, and replace all HD, not only the huge amount of investment, will be faced with a huge decision risk.
The second-generation high-definition system has to meet basic needs, but in the real-time requirements occasions of big scene image clarity, detail situations requiring high performance or unsatisfactory ,200-400ms delay, allow the capture of high-speed mobile target precision PTZ operation very difficult. At the same time, access to the existing analog system, the analog image compression encoding and then decoding on the wall, the image quality has declined markedly, so that customers feel not as good as the original analog image quality.
HD HD-SDI image can well overcome the shortcomings of HD IPC image delay, image damage, but large-scale HD-SDI HD system is not only the complexity of the systems: HD HD-SDI Optical transmission and exchange need HD-SDI matrix video distribution needs to HD-SDI Splitter, storage and networking need HD-SDI encoder, and its construction cost is also very high, so pure HD-SDI HD surveillance system is difficult to promote large-scale application.
Thus, both play HD IPC and high-definition HD-SDI advantages, but also able to overcome their own shortcomings, and also a third-generation high-definition surveillance system seamlessly access the existing analog surveillance system was born. Third-generation high-definition surveillance system can be mixed according to the actual needs of the user layout definition IP Camera and high-definition HD-SDI camera and unified on the wall in the monitoring center, HD-SDI image display is the original real-time high-definition image for SD analog image displayed is real-time lossless analog image effects.

Third-generation high-definition surveillance system, HD IP Camera HD-SDI HD, SD the mixed analog video access, mixed on the wall, not simply by the image of HD-SDI and analog image compression coding into a unified IP image, and then to achieve unified decoding on the wall display. If only compress images on HD-SDI, analog image coding and then unified decoding on the wall, you will lose the HD-SDI image, the significance of the presence of the analog image, since IP images are displayed on the wall.
Third-generation high-definition surveillance system, according to the different characteristics of IP images, HD-SDI image, analog image access, respectively, through technical means unified on the wall to display different images, the IP image display, there is a delay , some damage to the decoded image of the image display of the HD-SDI is no delay, and the original HD picture lossless analog image display is lossless, the original analog no delay effect. Third-generation high-definition surveillance system is truly integrated HD IPC image, the the SD IP images, images of high-definition HD-SDI, SD analog images, the system not only meet the needs of high-definition, high real-time image, but also to meet the digital storage requirements of the IP network transmission realize any networked IP HD video, HD-SDI, HD video, analog video, scheduling, switching, control. At the same time, the third-generation high-definition surveillance system or a multi-service integrated system, in addition to video, audio, can also support a variety of signal data, Ethernet switch access able to solve the multi-service on the same platform at the same time access problems. The typical representative of the third generation of high-definition surveillance system is Hangzhou Zhongwei VAR3S HD digital video platform.
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