I Series Network Video Recorder User Manual, 030117NA
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Figure 164 Set Audio Exception Detection Rules
7.
Check the Audio Input Exception checkbox to enable the Audio Loss Detection function.
8.
Check the Sudden Increase of Sound Intensity Detection checkbox to detect a steep rise in sound in the
surveillance scene. Set the sound detection sensitivity and threshold (see below).
•
Sensitivity: Range [1-100], the smaller the value, the more severe the change must be to trigger the
detection.
• Sound Intensity Threshold: Range [1-100] filters the environment sound. The louder the environment sound,
the higher the value should be. Adjust it according to the real environment.
9.
Check the Sudden Decrease of Sound Intensity Detection checkbox to detect a steep drop in sound in the
surveillance scene. Set the detection sensitivity [1-100] as required.
10.
Click Apply to activate the settings.
10.9
Sudden Scene Change Detection
The Scene Change Detection function detects changes in the surveillance environment affected by external factors
such as intentional rotation of the camera, and certain actions can be taken when the alarm is triggered.
NOTES:
Refer to
Chapter 9.2 Face Detection
for steps to configure Scene Change Detection.
Sensitivity
in Rule Settings ranges from 1 to 100, and the higher the value, the more easily the change
of scene can trigger the alarm.
10.10
Defocus Detection
Image blur caused by lens defocus can be detected, and certain actions can be taken when the alarm is triggered.