Alarm detection recording: The hardware of the alarm sensor is used to notify the monitoring system that the situation has occurred on the scene, and the linkage recording is performed. This is widely used in the analog system. The disadvantage is that the simulation system can only record the scene after the alarm occurs, and the video is recorded in advance. Hard to achieve. The alarm detection recording function provided by the digital monitoring system can automatically record the video image data for a period of time before and after the alarm when the alarm sensor issues an alarm. This function is very similar to the motion detection recording function. Combined mode recording: The combination of the above various recording modes is difficult to implement in the analog system, but in the digital monitoring system, it can be conveniently realized by the user's simple setting according to actual needs. Moreover, reasonable settings can greatly improve the system's work efficiency, resource utilization, system reliability and other indicators.
The outstanding advantages of various data processing digital video surveillance systems are the comprehensive processing of various data, including alarm log, video log, user operation log management, user authority hierarchical management, PTZ lens control, data backup management and database management. The intelligent retrieval playback system provides intelligent and quick retrieval of playback video data. There are also several ways to play back, such as: search and playback by time, location, camera number, alarm event, etc. The retrieval and playback function of the digital system is much better than the analog system. Its use method is simple, efficient and accurate, and further image processing can be performed to facilitate event analysis and processing.
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