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In the light rail guidance system (light rail passenger information guidance service system), 76 42 "Samsung plasma displays have been installed in 17 stations of the subway guidance system. Passengers can not only see many beautifully made advertisements, but also Many beautiful entertainment consultations, you can also see the arrival time of the next train ...
In fact, this multimedia carrier is not a traditional TV media, but another important media platform after digital media such as free magazines, newspapers, DM flyers, etc.-digital outdoor multimedia. Not only can she provide passengers waiting for trains with practical information in entertainment, finance, and other aspects, but more importantly, she is also an integral part of the entire subway informatization. For example, she can display the arrival time listed on the next trip; after an emergency occurs in the train, she can send the operation information and service information of the train to the platform and the carriage, so that the passengers in the light rail can quickly get the operation information of the train, and so on. This media platform is at the world's leading level and represents a new media development trend.
Digital Outdoor Media (DOOH) is the abbreviation of "Digital Out Of Home" in English, it is a new combination of traditional TV and outdoor media. This media platform is an important part of the Passenger Information & Direction System. It uses high-tech means such as wireless local area transmission, optical fiber communication and control software to improve the light rail train from the perspective of passenger service. A series of services, such as station reporting, dredging, and guidance, strengthened the train operation information management, data management, and safety management within the light rail, which greatly improved the light rail operation service standards. At the same time, through careful calculations, she can maximize the high ratings and high exposure frequency of the media, which makes her cost per thousand people cheaper and the advertising audience more reasonable. Due to the function of carrying light rail operation information, she will surely become the most frequently watched media and a good ride assisting tool in the subway.
A light rail guidance system adopts distributed all-digital multimedia network publishing and broadcasting technology. It is a distributed all-digital multimedia network publishing and management platform composed of a control center and 17 stations / vehicle subsystems. The control center subsystem is the core platform and management center of the system. The control center and each station subsystem are logically a three-layer tree structure. The first layer is the control center; the second layer is the relay controller of each station, and they are each connected to the control center through the optical fiber Ethernet provided by the owner. The third layer of the three-layer tree structure of the entire system is the station media controller.
The VGA signal and audio signal from the platform's multi-media controller to the plasma display screen are transmitted by a five-category network cable, and the image quality is good, which fully reaches the quality of high-definition TV. Bring unprecedented high-quality images with audio enjoyment to passengers.
To achieve such high-quality image effects, the transmission of the video signal (VGA signal) from the station media controller to the plasma display is crucial. The distance from each station media controller to the plasma display screen is more than 200 meters. The transmission of VGA signals by traditional video cables will inevitably cause image dragging * and blurring. At the same time, the image is easily affected by external interference and causes image instability.
The VGA transmitter produced by Beijing EasyControl Technology uses twisted pairs to transmit computer RGB signals or composite video signals. It is an international new technology. An important problem that needs to be solved in video signal transmission is to eliminate electromagnetic interference. The traditional coaxial cable video transmission is an unbalanced transmission system, which uses a shielding method to eliminate interference. The twisted pair transmission of VGA signal is to use patented technology to encode the H and V signals onto the RGB signal and then send it after emphasis. Only three pairs of CAT-5 cable are used to complete the RGBHV of VGA, SVGA, SXGA, XGA, SXGA The balanced codec of the signal, and the use of long-distance high-frequency compensation and aggravation processing, bandwidth up to 350MHz. The industry's unique balanced input signal buffer, ground potential isolation, variable gain amplification, balanced / unbalanced conversion, five-stage pole weighted equalization compensation, common mode signal recovery, output gain adjustment, co-channel signal decoding, high-fidelity video distribution Multi-level broadcast-level video signal processing technology, with continuous brightness and contrast control, makes the transmission distance of XGA (1024 * 768 / 60Hz) reach 300 meters, because the entire transmission system uses balanced transmission with weighted zero value splitting The patented technology, so the twisted pair will not cause EMI interference when transmitting signals. In addition, an extra pair of twisted pairs can transmit audio signals. The twisted pair VGA transmitter has the following advantages:
1. The wiring is convenient, which is convenient for the comprehensive wiring of the system.
2. The construction is simple.
3. The cost of the line is low, equivalent to about one eighth of the coaxial cable.
4. Can eliminate the interference of the ground wire system to the video signal.
The VGA signal transmitter consists of two parts, a transmitter and a receiver. The video signal (VGA signal) and audio signal output from the media controller are sent to the transmitter. The transmitter to the receiver is a super five-category network cable with a length of up to 300 meters. The receiver outputs video signal (VGA signal) and audio signal for plasma For display. If two plasma display screens are installed together, the video signal output from the receiver can be sent to the VGA signal distributor for multiple plasma display screens. The application display is as follows:
The VGA signal transmitter of Beijing Easy Control Technology applied to a light rail has withstood the impact of various high-temperature weather in Chongqing this year, Daoliang Shang 1500V high voltage power supply, and the four-way back and forth motor vehicles. The operation is stable and the image is clear. It is fully capable of long-distance transmission of VGA signals under various conditions.
Therefore, the VGA transmitter is the best choice for VGA signal transmission in various multimedia information systems in the future. It is the best for a high-quality video transmission.
In fact, this multimedia carrier is not a traditional TV media, but another important media platform after digital media such as free magazines, newspapers, DM flyers, etc.-digital outdoor multimedia. Not only can she provide passengers waiting for trains with practical information in entertainment, finance, and other aspects, but more importantly, she is also an integral part of the entire subway informatization. For example, she can display the arrival time listed on the next trip; after an emergency occurs in the train, she can send the operation information and service information of the train to the platform and the carriage, so that the passengers in the light rail can quickly get the operation information of the train, and so on. This media platform is at the world's leading level and represents a new media development trend.
Digital Outdoor Media (DOOH) is the abbreviation of "Digital Out Of Home" in English, it is a new combination of traditional TV and outdoor media. This media platform is an important part of the Passenger Information & Direction System. It uses high-tech means such as wireless local area transmission, optical fiber communication and control software to improve the light rail train from the perspective of passenger service. A series of services, such as station reporting, dredging, and guidance, strengthened the train operation information management, data management, and safety management within the light rail, which greatly improved the light rail operation service standards. At the same time, through careful calculations, she can maximize the high ratings and high exposure frequency of the media, which makes her cost per thousand people cheaper and the advertising audience more reasonable. Due to the function of carrying light rail operation information, she will surely become the most frequently watched media and a good ride assisting tool in the subway.
A light rail guidance system adopts distributed all-digital multimedia network publishing and broadcasting technology. It is a distributed all-digital multimedia network publishing and management platform composed of a control center and 17 stations / vehicle subsystems. The control center subsystem is the core platform and management center of the system. The control center and each station subsystem are logically a three-layer tree structure. The first layer is the control center; the second layer is the relay controller of each station, and they are each connected to the control center through the optical fiber Ethernet provided by the owner. The third layer of the three-layer tree structure of the entire system is the station media controller.
The VGA signal and audio signal from the platform's multi-media controller to the plasma display screen are transmitted by a five-category network cable, and the image quality is good, which fully reaches the quality of high-definition TV. Bring unprecedented high-quality images with audio enjoyment to passengers.
To achieve such high-quality image effects, the transmission of the video signal (VGA signal) from the station media controller to the plasma display is crucial. The distance from each station media controller to the plasma display screen is more than 200 meters. The transmission of VGA signals by traditional video cables will inevitably cause image dragging * and blurring. At the same time, the image is easily affected by external interference and causes image instability.
The VGA transmitter produced by Beijing EasyControl Technology uses twisted pairs to transmit computer RGB signals or composite video signals. It is an international new technology. An important problem that needs to be solved in video signal transmission is to eliminate electromagnetic interference. The traditional coaxial cable video transmission is an unbalanced transmission system, which uses a shielding method to eliminate interference. The twisted pair transmission of VGA signal is to use patented technology to encode the H and V signals onto the RGB signal and then send it after emphasis. Only three pairs of CAT-5 cable are used to complete the RGBHV of VGA, SVGA, SXGA, XGA, SXGA The balanced codec of the signal, and the use of long-distance high-frequency compensation and aggravation processing, bandwidth up to 350MHz. The industry's unique balanced input signal buffer, ground potential isolation, variable gain amplification, balanced / unbalanced conversion, five-stage pole weighted equalization compensation, common mode signal recovery, output gain adjustment, co-channel signal decoding, high-fidelity video distribution Multi-level broadcast-level video signal processing technology, with continuous brightness and contrast control, makes the transmission distance of XGA (1024 * 768 / 60Hz) reach 300 meters, because the entire transmission system uses balanced transmission with weighted zero value splitting The patented technology, so the twisted pair will not cause EMI interference when transmitting signals. In addition, an extra pair of twisted pairs can transmit audio signals. The twisted pair VGA transmitter has the following advantages:
1. The wiring is convenient, which is convenient for the comprehensive wiring of the system.
2. The construction is simple.
3. The cost of the line is low, equivalent to about one eighth of the coaxial cable.
4. Can eliminate the interference of the ground wire system to the video signal.
The VGA signal transmitter consists of two parts, a transmitter and a receiver. The video signal (VGA signal) and audio signal output from the media controller are sent to the transmitter. The transmitter to the receiver is a super five-category network cable with a length of up to 300 meters. The receiver outputs video signal (VGA signal) and audio signal for plasma For display. If two plasma display screens are installed together, the video signal output from the receiver can be sent to the VGA signal distributor for multiple plasma display screens. The application display is as follows:
The VGA signal transmitter of Beijing Easy Control Technology applied to a light rail has withstood the impact of various high-temperature weather in Chongqing this year, Daoliang Shang 1500V high voltage power supply, and the four-way back and forth motor vehicles. The operation is stable and the image is clear. It is fully capable of long-distance transmission of VGA signals under various conditions.
Therefore, the VGA transmitter is the best choice for VGA signal transmission in various multimedia information systems in the future. It is the best for a high-quality video transmission.
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