A network camera can be seen as a combination of a video camera and a computer. It can capture images and directly transmitted through the IP network, so that the authorized user to the standard IP-based network infrastructure implemented in a local or remote location by viewing, storing and managing video data. The network camera has its own independent IP address, can connect directly to the network and has a built-in web server, email client, alarm management, programmability, and many other smart features. The network camera does not need to be connected to a PC. It can operate independently and can be placed in any location that has an IP network interface. Compared with analog cameras and video servers, network cameras have a higher degree of integration, installation is more flexible, and some even require only one cable to use, while analog cameras and video servers still require analog video transmission at a certain distance. The impact of the surrounding environment is greater than the webcam.
In addition to the video information, the network camera can also realize more other functions through the same network connection and transmit other useful information such as: video motion detection, audio, digital input and output (can be used to implement alarm linkage, such as triggering Alarms or activate on-site lighting, etc.), serial ports used to transmit serial data or PTZ device drivers, etc. The image cache in the webcam can also save and send video images before and after the alarm occurs. In recent years, network camera technology has caught up with analog cameras, and can also meet the actual needs and technical specifications of various types of video surveillance applications. In addition, network cameras can also provide a range of advanced features, and in some respects even exceed analog cameras.
In short, analog cameras can only transmit unidirectional video signals, and their performance is subject to the DVR and operator level. However, IP cameras can transmit full-duplex digital information and can be effectively integrated with other devices in the system. Enable them to achieve higher performance levels in a distributed, scalable environment. The network camera can communicate with multiple application systems in parallel to achieve a variety of different functions, such as detecting motion in a picture, or sending video streams in different formats.
However, we should note that the current development of analog cameras is quite mature and there are many types of network cameras. However, the number of network cameras is still very small, which limits its application, and the combination of analog video cameras and video servers, such as network video surveillance It is easier to upgrade the traditional analog camera to the same function as the network camera, and it is easy to combine various network monitoring devices such as network bolts, network hemisphere, network integrated machine, network high-speed ball, and network infrared waterproof. Devices that are directly integrated into a single network camera require high costs. Traditional camera manufacturers are reluctant to make such a large investment in this area, but we believe that once the market matures, these products will be developed in a very short period of time. .
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