Network Video Recorder User Manual
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Step 6 Follow these steps to set the detection rules and detection areas.
1) Select an Arming Region to configure. Up to 4 regions are selectable.
2) Drag the sliders to set Time Threshold and Sensitivity.
Time Threshold: The time of the objects removed from the region. If the value is 10,
alarm will be triggered after the object disappears from the region for 10s. Its range is
[5s-20s].
Sensitivity: The similarity degree of the background image. If the sensitivity is high, a very
small object taken from the region will trigger the alarm.
3) Click Draw Region and draw a quadrilateral in the preview window by specifying four vertices of
the detection region.
Step 7 Set the arming schedule. Refer to Chapter 11.1 Configure Arming Schedule.
Step 8 Set the linkage actions. Refer to Chapter 11.2 Configure Alarm Linkage Actions.
Step 9 Click Apply.
12.9 Audio Exception Detection
Purpose
Audio exception detection detects abnormal sounds in the surveillance scene, such as a sudden
increase/decrease in sound intensity.
Step 1 Go to System > Event > Smart Event.
Step 2 Click Audio Exception.
Figure 12-9 Audio Exception Detection
Step 3 Select a camera to configure.
Step 4 Optionally, check Save VCA Picture to save the captured audio exception detection pictures.
Step 5 Set the detection rules:
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