Digital Video Recorder User Manual
140
Please refer to the Chapter 9.4 Intrusion Detection for operating steps to configure the object
removal detection.
The Threshold [5s-20s] in the Rule Settings defines the time of the objects removed from the
region. If you set the value as 10, alarm is triggered after the object disappears from the region
for 10s. And the Sensitivity defines 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.
Up to 4 rules can be configured.
9.13 Audio Exception Detection
Purpose
Audio exception detection function detects the abnormal sounds in the surveillance scene, such as
the sudden increase/decrease of the sound intensity, and some certain actions can be taken when the
alarm is triggered.
The audio exception detection is supported by all analog channels.
Step 1 Go to Menu > Camera > VCA.
Step 2 Select the camera to configure the VCA.
You can check the checkbox of Save VCA Picture to save the captured pictures of VCA
detection.
Step 3 Select the VCA detection type to Audio Exception Detection.
Step 4 Click to configure the trigger channel, arming schedule, linkage action and PTZ linking
for the audio exception alarm.
Step 5 Click the Rule Settings button to set the audio exception rules.
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