Standardization promotes the popularity of IP high-definition surveillance products

The development pace of IP high-speed high-speed ball did not stop. From the technical development of products, IP high-speed high-speed ball still has many technical problems to be solved. On the technical level, how can we effectively improve the nighttime effect of IP high-speed dome cameras and make the night look more clear? How can we see farther and more completely under the premise of seeing clearly? How to further reduce the deployment cost of IP high-speed dome surveillance system? And so on are all problems facing the development of integrated camera technology.

The core component - "HD integrated movement"

After years of development of the integrated camera movement, the design of its core technology integrated lens and auto-focus algorithm has been quite mature. The standard of high-definition integrated lens quality is roughly divided into: optical performance, stability and consistency of key components. The optical performance mainly refers to the resolution of the lens under various optical multiples. Of course, it also includes the seriousness of ghosting, purple fringing, and dispersion. The key components mainly include the aperture, motor, and filter switching components.

After entering the era of high-definition, these technical problems have been resolved quickly. Currently, different products represented by Japanese lenses, MX lenses, and domestic lenses have been formed. Japanese lenses generally perform well in terms of optical performance and stability, but their prices are relatively high. ***Cost ratio is relatively high, but optical performance, especially high resolution image performance, is insufficient; while domestic manufacturers of all-in-one lenses exhibit stability and consistency. Not ideal.

In terms of autofocus algorithms, several major solutions have also been formed. For example, HD autofocus solutions represented by TI's DM368, FPGA and ASIC. The FPGA solution belongs to the hardware circuit implementation mode, and the stability is high. The effect and speed of autofocus are fast. The solution of the DM368 is a software system combined with the implementation of the hardware register. Its autofocusing effect is relatively good, but the speed and stability The sexual aspect needs to be tested; the ASIC solution is implemented by the hardware circuit and the simple software method, and the stability is high, but the development flexibility of the movement manufacturer is greatly limited, and it is difficult to improve the effect and speed of the autofocus.

Core Algorithm - "Efficient Stream Control"

After years of development, video coding technology has made great strides in MPEG-1 (MP3, VCD), MPEG-2 (DVD, SVCD), and MPEG-4 video compression efficiency and image quality.

In particular, the H.264 technology developed from MPEG-4 Part10 has become the mainstream coding technology in the current surveillance market with its high image compression efficiency and good image quality. In recent years, H.264 technology has continued to evolve. From the initial Baseline Profile, only I/P frames were provided. Only progressive scan and CAVLC (content-based adaptive variable length encoding) are supported. The mainstream MainProfile has not only been provided. I/P/B frames, while also supporting progressive and interlaced scanning, and multiple encoding methods CAVLC (content-based adaptive variable-length encoding) or CABAC (content-based adaptive binary arithmetic encoding), compared to CABAC CAVLC can improve compression efficiency by at least 10%-15%.

At present, products based on H.264 Main Profile can provide compressed video of 3M bitstream at 720P resolution and compressed video of 6M bitstream at 1080P resolution under the premise of ensuring image quality. The H.264 compression coding technology will be further developed. It will also be possible to implement HighProfile's compression coding capability on HD high-speed balls. HighProfile will provide higher compression efficiency and better image quality while also providing highly lossless video coding. To meet the needs of platform video intelligence analysis.

The biggest advantage of standardization and promotion of product popularization of IP surveillance products is the popularization of networks and the customization of application protocols. However, since all manufacturers are self-contained, most IP cameras, NVRs, and monitoring platforms on the market cannot be compatible with each other. To this end, in May 2008, Axis, Bosch and Sony announced that they will jointly establish an international open network video standard network interface, named ONVIF (Open Network Video Interface Forum). ), and jointly formulate open industry standards based on open and open principles. From this IP surveillance product began to enter the era of standardization.

The agreement stipulates the contents of device discovery, real-time audio and video, camera PTZ control, video control, video analysis, and so on, laying the technical foundation for the interconnection of IP high-speed high-speed ball. The above three major technological breakthroughs have cleared the technical obstacles for the manufacture, application and promotion of IP high-speed high-speed balls, which has enabled IP high-speed high-speed balls to quickly replace IP-standard high-speed balls and become the mainstream product of IP high-speed balls.

Future development challenges How to effectively improve the nighttime effects of IP high-speed domes, making the night more visible? From a technical point of view, the best way to solve the night effect is to fill up the light. Whether it is infrared light, laser light, or white light, it can make up for the nighttime effects of IP high-speed domes.

How can we see farther and more completely under the premise of seeing clearly? Like the development direction of the SD movement, a higher magnification HD integrated movement will soon be available. In the era of high-definition integrated movement, the lens design with a higher magnification will become the focus of technology. Such a lens can solve the problem of seeing further. However, due to the needs of high-speed ball applications, the more complete ones will also become a direction for technological development. The so-called full, refers to when the movement in the observation of a target, will not lose the overall scene of the monitoring image.

How to further reduce the deployment cost of IP high-speed dome surveillance system? The deployment cost of IP high-speed high-speed ball is mainly composed of transmission system cost, storage system cost, and IP HD high-speed ball maintenance cost. The reduction of the cost of transmission systems and storage systems will mainly depend on the improvement of the efficiency of coding algorithms, such as the H.264 HighProfile technology described above. Of course, other methods can also be considered, such as the storage (2.5 inch hard disk) pre-IP HD high-speed ball, the benefits of this are obvious, directly reducing the video's dependence on the IP network transmission system, while the storage The system is more rationally allocated to the use side. For the maintenance cost of IP high-speed dome, it can be based on the ONVIF protocol to realize the "0" configuration of equipment deployment and maintenance, simplify the operation requirements of construction personnel, and reduce the difficulty of system maintenance.

How to meet the industry application requirements based on HD image quality? Due to the advent of high-definition era, massive data storage and sorting will be a big test for managers. The need for intelligence by users will become more and more prominent. The management of unstructured video data streams for data structure will be very helpful to managers. The so-called data structure is to pre-identify the content of interest in the surveillance video through an intelligent pre-positioning method and collate it into data that can be retrieved. IP high-speed domes meet the application requirements of specific industries by learning and analyzing these data. For example, intelligent tracking will be more accurate.

In the context of this high-definition era, IP high-speed domes will continue to evolve and evolve through their own technological advantages and characteristics to meet users' needs for HD high-speed domes.