Three major video and audio monitoring system construction points

[ Pacific Security Network News ] When using video and audio monitoring system, we must first understand what it is doing. Speaking of video and audio monitoring system, it is mainly the core and foundation of the entire security system of the police station. Its role is to monitor the daily life of the police. Monitor the movement of detainees to provide video and audio information; when an accident occurs, the video and audio synchronization video files can be transferred from the data stored in the monitoring system as the basis for accident analysis and evidence collection; at the same time, the video and audio monitoring system needs to be alarm, access control, intercom Other subsystems provide the video information needed for linkage. Therefore, the construction of the AV monitoring system needs to put me in the following three points: 1. The combination mode of digital and analog should be adopted. <br> The main control equipment of the monitoring system is divided into analog main control equipment and digital main control equipment. The main function of the digital main control equipment is digital compression and storage of video and audio files, and its After the image is digitally compressed, it causes a certain loss, which leads to a decrease in video quality. This is a disadvantage of digital devices used as real-time monitoring. Therefore, in order to ensure the image quality of real-time monitoring, the monitoring room of the supervisory office should adopt the digital-analog combined construction mode, and the analog matrix is ​​equipped as the main control device for real-time monitoring.
2. Image storage of digital master control device<br> The core function of digital master control device is the digital storage of video files, and the stored video files are used as the basis for accident analysis and evidence collection. Therefore, the definition, storage time, and classification search function of the video file are the main points for selecting the digital master device.
The playback quality of the video file should be D1 quality, ensuring clear playback quality and providing a strong basis for accident analysis.
Video files should be stored for no less than 15 days.
In order to ensure quick query of video files, the retrieval of video files needs to support various retrieval functions, including time, channel, alarm linkage, access control linkage and on-duty police name query function.
3. Provide video images for linkage of various subsystems <br> The digital master control device must have interfaces for linkage with alarms, alarms, intercoms, etc., receive various linkage information, and provide video images required for linkage for the management platform. The interface between the digital main control device and the access control, alarm, intercom and other systems is divided into two types: network interface and analog interface. The analog interface can be free from network restrictions, and is more reliable and practical.

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