Sudden Scene Change Detection - Vezco VZ-NVR3200-4HD Quick Start Manual

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
face detection alarm.
Step 5 Click the Rule Settings button to set the audio exception rules.
1) Check the checkbox of Audio Input 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.

10.10Sudden Scene Change Detection

Purpose:
Scene change detection function detects the change of surveillance environment
affected by the external factors; such as the intentional rotation of the camera, and some
certain actions can be taken when the alarm is triggered.
Network Video Recorder User Manual
Figure 10-10 Set Audio Exception Detection Rules