Network HD CCD is mainly Sony, CMOS sensor chip suppliers are more, high-end such as Sony, Panasonic, mid-range such as Micron, low-end such as Omnivision (this is also used by Apple phones).
This article refers to the address: http://
The performance of CCD and CMOS sensors in network HD is mainly determined by their different processing technologies. CCD uses global exposure technology, and the effect is obvious under low illumination, but the process is complicated, the yield is low, the price is high; CMOS adopts progressive exposure. The technology, the process is simple, can be mass-produced, has a strong price advantage, but the effect under low illumination needs to be improved, but the high-end CMOS sensor is even better than the CCD under low illumination.
Undoubtedly, CMOS sensors are the mainstream technology trend of IP HD.
With the increase in technology and application of CMOS sensor IP HD cameras, the price of IP HD cameras will be more approachable, and IP HD cameras will gradually replace analog and SD cameras and enter thousands of households.
The core component of the IP HD camera is the sensor, and the second is the Soc processing chip. The main problem of CMOS sensors is how to continue to improve low illumination and wide dynamic effects. The main problem of Soc processing chips is how to continue to improve processing power and provide higher, faster and better information.
The advantages of IP network HD cameras are mainstream trend products in terms of high definition, easy to use, and undisturbed. The disadvantage is that the price is still high, the products are not fully popularized, and the inherent market acceptance needs to continue to improve.
The advantages of HD-SDI HD cameras are uncompressed, real-time transmission, and closed security. The disadvantages are high cost, troublesome wiring, vulnerability to interference, and limited transmission distance. They are only transitional products.
At present, the proportion of IP high-definition cameras is not very large, there is a lot of room for development, the prospects are very promising, and the specific share is not good.
HD-SDI and network HD will exist simultaneously in a certain period of time. HD-SDI is one year later than the high-definition network technology, and the supporting facilities cannot keep up, and the price and cost will be high. However, since HD-SDI continues the traditional thinking of analog monitoring, from the user's point of view, the degree of acceptance is relatively high. With the popularity of network monitoring in large-scale project construction and security exhibitions around the world, network cameras are gradually becoming well-known by users, and according to actual applications, network HD products have certain advantages over HD-SDI products. However, the future trend must be network HD, and currently both network HD and HD-SDI HD have their own markets, and may add HD-SDI interfaces at the same time as the high-definition network.
The network HD camera has been in the market promotion period since 2010. With the application of high-definition products such as Shanghai World Expo, Guangzhou Asian Games and Safe City, the market growth rate of network HD has reached more than 30% in the past two years. This also shows that the overall effect and solution of network HD has been accepted by users. Moreover, as HD technology gradually matures, the low illumination and bandwidth problems of network HD products have been improved, and the cost is also declining. It can be said that HD is gradually on the right track, and analog HD is an irreversible trend. .
The advantage of the network HD front-end is its high-definition monitoring effect. The simple and convenient system wiring eliminates the cumbersome construction, and can be remotely monitored and has certain advantages in handling. As for the choice of network HD products, it depends on the actual needs of users, and different options are applied to the budget cost of the project, but the lowest entry threshold is the 720P monitoring effect. In the small project, the existing network can be equipped with a high-definition system, and the relative selection cost is relatively low; in the large-scale network monitoring, the utility of the front-end is mainly considered, the scene is selected, and a dedicated network is needed, so that security is required. And reliability can be guaranteed, which has higher requirements for the comprehensive performance of network HD products.
In large-scale high-definition video surveillance networking, card frame phenomenon in video transmission is inevitable. There are two reasons: one is the quality of the transmission cable; the other is the defect of the network data transmission technology itself. In order to save costs, some engineers do not consider the impact of low-cost cables on the entire video surveillance system. The multiple cascade of cables will also affect the transmission of high-definition video. For example, the general network HD product test effect delay is less than 200ms, but the delay in actual application is much higher, which is closely related to the cable. At present, optical fiber transmission is a good solution. Light transmission is stronger than the network cable in terms of anti-interference ability and transmission efficiency, and it has a good guarantee for the stability of high-definition video transmission. The network's own packet loss problem is a common phenomenon. This is unavoidable. In order to ensure the integrity of HD video, most manufacturers currently use the front end to store the video in real time.
Relevant domestic departments require increased bandwidth construction, and gradually realize fiber-to-the-home, and increase the current bandwidth of 2-3M to an average of 10M or more. The joining and investment of operators has a certain driving force for the development of fiber-to-the-home, which is a good news for the high-definition network. For the manufacturer, the advanced compression technology is applied to the codec, which makes the compression ratio larger and consumes less bandwidth. In addition, the front-end intelligent added value is compressed by the smart bit rate, and the dual code stream and multi-code are adopted. Streaming technology to reduce the transmission rate of bandwidth, our camera uses multi-stream technology, which can better adapt to different network environments.
At present, many users think that the price difference between the front-end network HD camera and the traditional analog camera is too large, and the HD front-end is too expensive. But in fact, starting from an integrated solution, the network HD cost is relatively advantageous. For example, the comparison between the 16-channel analog monitoring system and the 16-channel network HD video surveillance system: the cost required for the front-end monitoring probe, coaxial cable construction, back-end storage device, and display device setting is basically the same as the network HD solution. In recent years, the network HD cost is decreasing, and the back-end storage solution and application solution are gradually improved. It is believed that the cost will no longer become the main factor restricting the development of the network HD.
Intelligent video analysis is mainly the intelligent video analysis technology of front-end cameras and back-end platforms, mainly focusing on massive information retrieval, which requires certain optimization of the back-end platform. The current situation is that the user feedback network has a large amount of HD storage, and the video information retrieval is very cumbersome. Ten thousand hours of video may be useful for ten minutes, and the conventional technology is very troublesome to retrieve. At present, the practice of some mainstream manufacturers is to analyze and retrieve information keywords, scenes, and behavior analysis, specifically face recognition, license plate retrieval, behavior analysis, anti-intrusion, anti-object shifting, etc., to reduce the time of video retrieval. However, this requires the cooperation of the front-end camera and the back-end platform.
Best Gift for Kids: Surprised birthday gift for your baby, boy or girl. A nice holiday gift for kids teenager your friends,they absolutely love the led light.This 3D Led Christmas Motif Light, can be used at home, bedroom, baby-room,child-room, living room, bar, Cafe, restaurant, party, etc
Give Baby or Kids a Quite Sleep:You can place it on the table as NURSERY in baby-room or kids bedroom.The 3D night light would be a best companion when your kids are sleeping. Have a good sleep without fear of the darkness.
Increase the Holiday Atmosphere: Very cute animal-shape, Decorate your room you home ,the 3D Led Christmas Motif Light, is a nice decoration for birthday ,Christmas,New Year, Valentine's Day, Thanksgiving Day,Halloween and other special festivals.
Snowflake Christmas Lights,3D Led Christmas Motif Light,Led 3D Snowflake Motif Light,3D Led Motif Light
XINGYONG XMAS OPTICAL (DONGGUAN ) CO., LTD , https://www.xingyongled.com