Alarm
In video surveillance, the term alarm refers to different but related things. An alarm event occurs when a video surveillance product detects a threat. Alarm events have different names for different manufacturers, but the functionality is similar. Alarm events include:
- Entering or driving through a restricted area (intruder alarm, intrusion detection)
- Leaving a restricted area (Region Exiting Alarm)
- Staying in a restricted area for too long (protection against loitering, loitering alarm)
- Stealing and leaving behind objects (Object Removal and Unattended Baggage Detection)
- sudden increase in volume beyond normal levels (Audio Exception Detection)
The camera reacts to the triggering event with an automatic follow-up action, the actual alarm. All follow-up actions serve to immediately inform authorized people about the relevant situation so that they can initiate emergency response promptly. Possible follow-up actions are:
- Acoustic alarm via a siren, announcement via a loudspeaker
- Visual alarm on a traffic signal system
- Silent alarm by displaying messages and live images on monitors and mobile devices
- Notification of a security control center
- Recording the video stream
