Digital Video Recorder User Manual
185
You can click 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 and linkage action for the audio
exception alarm.
Step 5 Click the Rule Settings button to set the audio exception rules.
Figure 10-10 Set Audio Exception Detection Rules
1) Check the checkbox of Audio Loss Exception to enable the audio loss detection function.
2) Check the checkbox of Sudden Increase of Sound Intensity Detection to detect the sound
steep rise in the surveillance scene. You can set the detection sensitivity and threshold for
sound steep rise.
Sensitivity: Range [1-100], the smaller the value is, the more severe the change should be
to trigger the detection.
Sound Intensity Threshold: Range [1-100], it can filter the sound in the environment, the
louder the environment sound, the higher the value should be. You can adjust it according
to the real environment.
3) Check the checkbox of Sudden Decrease of Sound Intensity Detection to detect the sound
steep drop in the surveillance scene. You can set the detection sensitivity [1-100] for
sound steep drop.
Step 6 Click Apply to activate the settings.
10.14 Defocus Detection
Purpose
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