At present, high-definition video signals have three transmission modes: analog, digital, and network. The first two methods are used to transmit lossless, uncompressed analog and digital HD signals.
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Analog high-definition signal transmission generally uses YPbPr component transmission, and one high-definition video signal requires three coaxial cables to transmit at the same time, and the cable usage is very large. Although the distance of the component transmission can be extended by the third-party device, since the transmission is an analog signal, the signal is damaged after being transmitted over a long distance. Therefore, YPbPr component transmission is not suitable for HD monitoring.
Digital HD signal transmission is generally transmitted by DVI, HDMI or HD-SDI. The transmission distance of DVI or HDMI is only a few meters, which is not suitable for monitoring transmission. Although HD-SDI can transmit about 100 meters, the requirements for coaxial cable are very high. High, the price of the cable is also very expensive, so it can only be prohibitive for large-scale applications in the system.
Network HD signal transmission, as its name suggests, is to transmit high-definition video signals through network transmission, and often uses a star-structured Ethernet network to realize high-definition network video signal transmission. The transmission distance varies from 100 meters to tens of kilometers depending on the selected line. Compared with the previous analog and digital methods, the transmission cost is relatively low and the performance is stable. It is currently the most widely used in high-definition surveillance systems. A cost-effective transmission method.
Anti Reflection Film (AR film) is a widely used optical thin film used to reduce optical surface reflection and improve optical transmittance. It is widely used in electronic displays, solar panels, eyeglass lenses, photography lenses, and other fields to provide clearer and brighter visual effects.
AR film is a thin film material with high transparency and low reflectivity. It changes the propagation mode of light by coating a special chemical substance on the optical surface, thereby reducing reflection and improving transmittance. The main function of AR film is to reduce the reflection loss of light on the optical surface, allowing the observer to see the details of the object more clearly, while improving the brightness and contrast of the display screen.
AR film has a wide range of applications in the field of electronic displays. In liquid crystal displays, LED displays, touch screens, and other devices, AR film can effectively reduce the reflection of ambient light, improve display performance and visibility. It can prevent problems such as flickering, blurring, and glare in the image, allowing viewers to use electronic devices more comfortably.
In addition, AR films are also widely used in solar panels. Solar panels typically need to absorb as much sunlight as possible and convert it into electrical energy, but the reflection of light can lead to energy loss. AR film can reduce the reflection of sunlight on the surface of solar panels, improve the absorption rate of light, and thus improve the efficiency of solar panels.
In the field of eyewear lenses, AR film can reduce surface reflection, improve transparency and visual clarity. It can avoid glare and interference, providing a more comfortable visual experience. In addition, AR film can also prevent dirt and fingerprints on the surface of glasses and lenses, making them easier to clean.
In summary, Anti Reflection Film (AR film) is a widely used optical thin film used to reduce reflection on optical surfaces and improve transmittance. It has important application value in fields such as electronic displays, solar panels, eyeglass lenses, and photography lenses, providing users with a clearer and brighter visual experience.
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