The challenge is clear: a comprehensive analysis of high-definition video surveillance technology[Copy link]
Page 1: High-definition demand is highlighted Page 2: Basics of high-definition applications Page 3: High-definition front-end acquisition technology Page 4: High-definition encoding standards Page 5: High-definition transmission technology Page 6: High-definition display technology Page 7: 1 [IT168 Technology] At present, the domestic security industry has not defined the standard for high-definition monitoring, and many manufacturers are promoting their products as "high-definition". Although many high-definition monitoring products have already appeared on the market, due to the limitations of many factors such as cost and technology, high-definition has not been effectively applied in the video surveillance industry. At present, high-definition is more of a "concept" level for the video surveillance industry. There are very few real applications, let alone popularization. This is not the result we want to see, and it is not conducive to the development of the entire industry. High-definition demand highlights that the requirements for security monitoring images and movie images are very different. For example, in terms of content, movies are good-looking, colorful, and spectacular; while monitoring requires real images, and the objects of attention are detailed and observable. It doesn't matter whether it looks good or not. The 16:9 screen ratio is the same indicator for high-definition standards at home and abroad, which conforms to the golden ratio and the comfort of human eyes. However, security monitoring requires attention to scenes and targets, and the embodiment of behavioral details. Whether 16:9 really meets the needs of monitoring scenes is still debatable, and so on. With the popularization and application of video surveillance, it has now become an effective tool for maintaining social order and assisting public security organs in solving various illegal cases. However, in many cases, the effect of video surveillance is not satisfactory. For example, the "suicide of Wu Xiaoqing, an official involved in organized crime" that was previously a hot topic on the Internet, but the video surveillance did not catch this scene, which is very embarrassing for the entire video surveillance industry. Everyone should have a similar impression that the surveillance videos or screenshots of the crime scene broadcast in newspapers or on TV before are always as blurry as UFO photos. More importantly, it is impossible for the public security organs to solve the case in the shortest time, and it takes a lot of manpower and material resources to restore the image. Of course, with the advent of batches of high-definition products, this phenomenon has been reduced, but it still puts forward higher requirements for high-definition video surveillance. For example, with the opening of the Wuhan-Guangzhou high-speed railway, video surveillance systems need to be installed along the line for all-weather monitoring. For high-speed trains with a speed of up to 350 kilometers per hour, the safety of the surrounding areas along the railway is particularly important. Obviously, ordinary cameras cannot meet the requirements, and high-definition lenses must be used to ensure the monitoring effect. According to Zhang Shuguang, deputy chief engineer of the Ministry of Railways and deputy chief designer of passenger dedicated lines (high-speed railways), according to my country's recent high-speed railway planning, by 2012, my country will build 42 passenger dedicated lines with a total mileage of 13,000 kilometers, including 5,000 kilometers of lines with a speed of 250 kilometers per hour and 8,000 kilometers of lines with a speed of 350 kilometers per hour. This is a good opportunity for the development of high-definition monitoring. With the rapid development of video surveillance technology, users' requirements for video surveillance products are also constantly increasing, with more complete and stable functions and clearer and more accurate performance requirements. At the same time, how to see a person's facial features clearly in monitoring places such as shopping malls and banks? How to see the license plate of a high-speed vehicle clearly? How to find the target quickly and accurately in crowded and noisy train stations, stadiums, squares and other places...? All these problems need to be solved by high-definition video surveillance products.
提升卡
变色卡
千斤顶
京公网安备 11010802033920号
