Network Video Recorder User Manual
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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 is triggered after the object disappeared from the region for 10s. Its range is [5s-
20s].
Sensitivity: The similarity degree of the background image. Usually, when the sensitivity is
high, a very small object taken from the region can trigger the alarm.
3) Click Draw Region and draw a quadrilateral in the preview window by specifying four
vertexes of the detection region.
Set the arming schedule. Refer to Chapter 11.1 Configure Arming Schedule.
Set the linkage actions. Refer to Chapter 11.2 Configure Alarm Linkage Actions.
Click Apply.
Audio Exception Detection
Purpose:
Audio exception detection detects the abnormal sounds in the surveillance scene, such as the
sudden increase/decrease of the sound intensity.
Go to System > Event > Smart Event.
Click Audio Exception.
Audio Exception Detection
Select a camera to configure.
Optionally, check Save VCA Picture to save the captured pictures of audio exception
detection.
Follow the steps to set the detection rules.
1) Select Exception Detection.
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