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Video surveillance is an important part of the security system. It is a comprehensive system with strong prevention capabilities. Video surveillance is widely used in many situations due to its intuitive, accurate, timely and rich information content. In recent years, with the rapid development of computers, networks, and image processing and transmission technologies, video surveillance technology has also made considerable progress.
The development of video surveillance systems has gone through roughly three stages. Before the early 1990s, mainly closed-circuit television monitoring systems based on analog equipment were called the first-generation analog monitoring systems. In the mid-nineties, with the improvement of computer processing capabilities and the development of video technology, people used the computer's high-speed data processing capabilities to capture and process video, and the use of high resolution display to achieve multi-image display, which greatly improved the Image quality. This PC-based multimedia console system is called the second-generation digital local video surveillance system. In the late 1990s, with the rapid increase of network bandwidth, computer processing capacity and storage capacity, and the emergence of various practical video processing technologies, video surveillance entered the all-digital era of the Internet, known as the third generation of remote video surveillance systems. . The third generation of video surveillance system is based on the network, with digital video compression, transmission, storage and playback as the core, featuring intelligent and practical image analysis.
It is not difficult to see from the development of video surveillance that video output as a real-time terminal has always played a pivotal role in video surveillance.
The video output video monitoring system in the video surveillance system is generally composed of front-end equipment (cameras, lenses, pan/tilts, protective covers, brackets, decoders, alarm probes, spotlights, etc.), central control equipment (hard disk recorders, matrix hosts, alarm boxes , video distributor, etc.) and display equipment (VGA, monitor, video wall).
Many video surveillance projects nowadays use video walls as display devices. The control room can display any camera image on the TV wall monitor through matrix switching. The use of the TV wall for monitoring has intuitive and convenient features that facilitate the monitoring personnel to real-timely find the monitored The abnormal situation of the target. In the field of surveillance, video wall monitoring can only be monitored in real time and cannot be played back. Therefore, it is often necessary to use a DVR together with a video matrix to form a complete monitoring system.
Among them, the realization of the video wall, that is, the video output has a variety of ways. The video output card is a kind of video output device with strong compatibility. It outputs the YUV data after the soft solution on the monitor, so it is suitable for the front end. A large-scale monitoring system composed of a variety of manufacturers' coding equipment.
The problem of video output in applications At present, with the increasing popularity of video surveillance applications and the maturing of technologies, video surveillance management applications in all industries present a trend of integration and unification, that is, decentralized management by individual management entities in the past. The point-based distribution gradually shifted to the point-by-point, line-by-line, and three-dimensional intertwined networked unified management.
This trend has led to a wider use of video surveillance, more diversified management objects, more integrated and unified management, and higher requirements for the performance, coverage, and especially compatibility of video output devices. For example, the video surveillance system in campus security, the management of the individual from their previous separate management of individual campuses, and gradually rise to the unified management of education management management, you need to integrate a number of units of video surveillance systems, due to the previous unit of video surveillance solutions and applications The platform tends to be complicated and the products used are also different manufacturers. When the video output sets are unified, they will face incompatibility issues. If DVRs or DVSs of different manufacturers are used at the front end, the terminal needs to be uniformly output on the TV wall, which is a challenge for the compatibility of video output devices.
In general, current video output devices are mostly limited to outputting a specific format stream. This means that the front end uses a certain manufacturer's equipment, and the terminal must also use the manufacturer's video output device when it is outputting on the wall. When the video surveillance system is integrated, it brings a lot of trouble, which not only increases the cost, but also brings many difficulties for the unified management of the video wall, and does not meet the application needs of various large-scale monitoring systems.
The development of video surveillance systems has gone through roughly three stages. Before the early 1990s, mainly closed-circuit television monitoring systems based on analog equipment were called the first-generation analog monitoring systems. In the mid-nineties, with the improvement of computer processing capabilities and the development of video technology, people used the computer's high-speed data processing capabilities to capture and process video, and the use of high resolution display to achieve multi-image display, which greatly improved the Image quality. This PC-based multimedia console system is called the second-generation digital local video surveillance system. In the late 1990s, with the rapid increase of network bandwidth, computer processing capacity and storage capacity, and the emergence of various practical video processing technologies, video surveillance entered the all-digital era of the Internet, known as the third generation of remote video surveillance systems. . The third generation of video surveillance system is based on the network, with digital video compression, transmission, storage and playback as the core, featuring intelligent and practical image analysis.
It is not difficult to see from the development of video surveillance that video output as a real-time terminal has always played a pivotal role in video surveillance.
The video output video monitoring system in the video surveillance system is generally composed of front-end equipment (cameras, lenses, pan/tilts, protective covers, brackets, decoders, alarm probes, spotlights, etc.), central control equipment (hard disk recorders, matrix hosts, alarm boxes , video distributor, etc.) and display equipment (VGA, monitor, video wall).
Many video surveillance projects nowadays use video walls as display devices. The control room can display any camera image on the TV wall monitor through matrix switching. The use of the TV wall for monitoring has intuitive and convenient features that facilitate the monitoring personnel to real-timely find the monitored The abnormal situation of the target. In the field of surveillance, video wall monitoring can only be monitored in real time and cannot be played back. Therefore, it is often necessary to use a DVR together with a video matrix to form a complete monitoring system.
Among them, the realization of the video wall, that is, the video output has a variety of ways. The video output card is a kind of video output device with strong compatibility. It outputs the YUV data after the soft solution on the monitor, so it is suitable for the front end. A large-scale monitoring system composed of a variety of manufacturers' coding equipment.
The problem of video output in applications At present, with the increasing popularity of video surveillance applications and the maturing of technologies, video surveillance management applications in all industries present a trend of integration and unification, that is, decentralized management by individual management entities in the past. The point-based distribution gradually shifted to the point-by-point, line-by-line, and three-dimensional intertwined networked unified management.
This trend has led to a wider use of video surveillance, more diversified management objects, more integrated and unified management, and higher requirements for the performance, coverage, and especially compatibility of video output devices. For example, the video surveillance system in campus security, the management of the individual from their previous separate management of individual campuses, and gradually rise to the unified management of education management management, you need to integrate a number of units of video surveillance systems, due to the previous unit of video surveillance solutions and applications The platform tends to be complicated and the products used are also different manufacturers. When the video output sets are unified, they will face incompatibility issues. If DVRs or DVSs of different manufacturers are used at the front end, the terminal needs to be uniformly output on the TV wall, which is a challenge for the compatibility of video output devices.
In general, current video output devices are mostly limited to outputting a specific format stream. This means that the front end uses a certain manufacturer's equipment, and the terminal must also use the manufacturer's video output device when it is outputting on the wall. When the video surveillance system is integrated, it brings a lot of trouble, which not only increases the cost, but also brings many difficulties for the unified management of the video wall, and does not meet the application needs of various large-scale monitoring systems.