The biggest advantage of 4K is high resolution, but video surveillance is a system, 4K has a higher demand for transmission, storage, and intelligence analysis, need related supporting, the maximum advantage is low rate Bring high quality, which can effectively reduce 4K to transmission, storage pressure, and the birth of H.265 directly affects the entire security video compression industry, inevitably causes an explosive growth of security super high definition.
In 2010, it is considered to be the HD "First Year" in the security video surveillance industry. This year, domestic mainstream security enterprises have launched the HD series of 720p and 1080p, and HD products have gradually become "new pets" for security engineering construction and application. With the continuous fermentation of HD, in 2011, all security companies have launched a series of high-definition network cameras to HD storage, HD management platforms, HD, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, high-definition, manufacture In the sense, it entered the application implementation phase. Today, 4K once again became a hot spot in the security video surveillance industry.
4K ultra HD technology has become the next competitive point of security leading companies. The coding standard based on H.265 technology will accelerate the extensive promotion of 4K technology. Relevant experts said that from the development history of video surveillance, from the previous generation of simulation monitoring to IP monitoring, develop from the standard clearance (SD) to HD (HD), and achieve a qualitative change. But from fHD to 4kuhd, it can be considered once an extension. At the same time, the popularization process of the clearance to HD is just catching the wave of video surveillance IP, and also encounters video surveillance good opportunities in China.
Although there is still a lot of problems in the use of 4K products regarding the 4K security products. At present, the mainstream HD will still keep 1080P for a long time, the overall cost of 4K monitoring is still too high, codec chip, algorithm, network transmission, storage, etc. still have a small bottleneck.
Among them, the 4K UHD camera is a big challenge for transmission. The biggest problem facing network transfer is bandwidth. From the current mainstream H.264 compression technology, you can guarantee the image transfer of 1 way 4K @ 25fps to be ideal within 15Mbps. But this bandwidth requires, is still unrealistic in China.
H.265 is currently recognized 4K coding technology, supporting this code means more smooth encoding / decoding 4K video. In contrast to H.264, H.265 provides more different tools to reduce the code rate, in the coding unit, each macroblock / mb size in H.264 is fixed 16x16 pixels, The coding unit of H.265 can choose from the smallest 8x8 to the maximum 64 × 64. But in fact, H.265 and H.264 standards have some overlap in various functions, for example, the HI10P part in the H.264 standard supports 10 bit color-deep video. Another part of the H.264 (Hi444PP) can also support 4: 4: 4 chroma sampling and 14bit color depth. In this case, the difference between H.265 and H.264 reflects that the former can use fewer bandwidth to provide the same function, the cost is the device computing power: therefore the H.265 encoded video requires more calculations. Ability to decode. At present, various codec chip manufacturers in the industry are gradually popularizing products based on H.265 algorithm.
For the use of 4K technology in the security field, there are people in the industry say that although the 4K monitoring product line is still in the primary application phase, with the H.265 encoding standard application and popular network bandwidth update upgrade, it will be driven The development of 4K super high-definition related equipment and products in the security industry. So subsequent 4K monitoring products are likely to replace FHD monitoring like FHD monitoring.
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