Security Industry 4K Ultra HD application challenges where
With the improvement of technology development and transfer conditions, the demand for increasingly high-resolution surveillance images from the 2010 high-definition network camera began to challenge the traditional analog cameras to HD now become the basic needs of many users, users for clarity pursuit Zhimakaihua steadily high.
In our interview, Blue Star Jiaocheng Ping spoke: "Today megapixel cameras are commonplace, and with 3 million or 5 million pixel camera is also emerging, change It was common, and the higher pixel 4k (approximately 8.3 million pixels) is also not rare. "Everyday, we see the 4K HD Theater, major appliance stores 4K Ultra HD TV, including this year's World Cup in Brazil Cup Big screen inside the stadium also uses 4K display technology.
Security Industry 4K Ultra HD application challenges where
What is 4K?
Common 4K screen number 8000000 pixels, resolution of 3840 * 2160 (QFHD) and 4096 * 2160 (UHD), is four times that of conventional full HD 1080P is the quasi-HD 720P is about 8-9 times. In addition to 4K technology involved in the application of traditional household appliances market, in the field of security surveillance began to slowly emerge. According 焦成平 description: "In the specification, or whether it is the field of security appliance industry, the definition of 4K is consistent."
High-resolution, large-scale monitoring
4K technology such high resolution, for practical application of how security can bring much help at all? Interview Jiaocheng Ping spoke: "4K technology is the most obvious advantage display resolution Increase, making more sophisticated monitoring screen. Monitoring of the key factors affecting the picture finesse is twofold: First, the number of pixels the screen, the second is the vertical resolution of the screen. The more the number of pixels of the screen, the same size screen performance Get more sophisticated, the smaller lattice. Because the human eye is sensitive to the vertical resolution, the higher the vertical resolution of the human eye can recognize more detail and layers. 4K technology in the field of application of the monitoring results to improve Meanwhile the number of pixels, but also enhance the vertical resolution of the screen, making the level of detail and more accurate picture, but with the special wide-angle lens surveillance, monitoring can achieve greater coverage. "
4K transmission bottlenecks blocking popularity in the security industry
Although the security industry is also bathed in 4K wind, but there is still the mainstream HD 1080P, at least this is a period of time. Because the overall cost is still too high 4K monitoring, A photosensitive chip codec chip; in algorithms, network transmission, storage, etc. are still not small bottleneck. Speaking HD will joint the network bandwidth, 4K Ultra HD so far beyond the bandwidth required for the general definition. Against This problem interview 焦成平 mentioned:. "H.264 compression technology to the mainstream point of view, the ability to transfer an image to ensure road 4K @ 25fps 15Mbps or less has been very good for me so Their current domestic network conditions, this type of bandwidth demand, apparently still too high. 4k technology to further advance in the future be able to get another major technology H.265 encoding, H.265 is now recognized 4K future coding, the coding means can support a smoother encoding / decoding 4K video. But now mainstream and H.264 to compare to see, H.265 provides more different tools to reduce code Rate in the coding unit is, H.264 each macroblock (marcoblock / MB) are fixed size 16x16 pixels and H.265 coding unit can be selected from a minimum of 8x8 To the largest 64 × 64. But in fact, H.265 and H.264 standards There is some overlap, for example, H.264 standard part of Hi10P support 10bit color depth on a variety of video features. Another part of H.264 (Hi444PP) can also support 4:4:4 chroma sampling and 14bit color depth. In this case, the difference between the H.265 and H.264 former can be embodied in less bandwidth to provide the same function, the equipment cost is required Higher computing power. H.265 encoded video requires more computing power to decode. Currently the industry each codec chip manufacturers are gradually introduced products based on H.265 algorithms, but also from the high cost of certain aspects limiting the H.265 popularity. "It can be seen through 焦成平 words, in order to make 4K promotion, is that the issue of cost and technology.
Back-end display devices are Che Houtui
Assuming these front-end equipment and transmission bandwidth problems can be solved in the end, whether 4K Ultra HD camcorder can monitor the site went out? Also in the rear end of the display device Che Houtui. Interview Jiaocheng Ping explained: "Although 4K TV in large numbers, but in the security industry, the display device is commonly used LCD monitor, On the current market situation, supports 4K ultra high-definition monitor or very little. Secondly, signal transmission cable is also a barrier, you want the perfect support for 4K transmission, HDMI 2.0 specification standards must support phase 1.3, 1.4 and earlier on the HDMI standard, the new specification will enhance the transmission bandwidth to 18Gbps. And because high-definition video image can only be transmitted using the HDMI cable, the HDMI cable Theoretical transmission distance is 10-15 meters, more than this distance, you need to support the relay device. On the whole, in the ultra-high-definition display rear part of the current input costs still relatively high. "
High cost, the application range is still small
How operators are not worth the 4K technology is a castle in the air yet? Only a mirage of fantasy it? In fact, 4K Ultra HD cameras in certain areas of application monitoring industry is still quite obvious Advantage. Such as airports, railway stations and traffic junctions.焦成平 example also talked about: "to the train station, for example, using a 4K square in front of the camera, surveillance can basically cover the entire range of Station Square, while basically able to see Pedestrian look. On transport, the installation of a 4K camera intersections, to cover the four directions intersection vehicle monitoring, if you use a traditional 720P or 1080P camera you need to install four more. If it is to capture the license plate, 2 million of the IPC can take a lane, 4K, you can directly shoot four lanes. "
Conditions for the use of 4K technology in the field of security, industry insiders said that although 4K monitoring product line is still in its infancy, but as technology development and user experience, will lead the industry to improve security related equipment 4K development and application environment , such as the back-end display devices, decoders, controllers, cloud storage, network DVR, network environment. So follow 4K monitoring products like high-definition monitor is likely to replace the standard definition monitor, like, UHD will replace the HD monitor.