User Manual

DS-720xHTI-Kx DVR User Manual
UM DS-720xHTI-Kx 012918NA 124
Figure 9-11 Set Audio Exception Detection Rules
1) Check the Audio Loss Exception checkbox to enable audio loss detection.
2) Check the Sudden Increase of Sound Intensity Detection checkbox to detect a steep sound rise in
the surveillance scene. You can set the detection sensitivity and threshold.
Sensitivity: Range [1-100]. The smaller the value, the more severe the change must be to trigger
detection.
Sound Intensity Threshold: Range [1-100]. Filters the environment sounds. The louder the
environment sound, the higher the value should be. Adjust it according to the real environment.
3) Check the Sudden Decrease of Sound Intensity Detection checkbox to detect a steep drop in the
surveillance scene sound. Set the detection sensitivity [1-100].
7. Click Apply to activate the settings.
9.14 Defocus Detection
Purpose
The image blur caused by lens defocus can be detected, and certain actions can be taken when the alarm
is triggered.
Refer to 9.1 Face Detection for operating steps to configure the defocus detection.
The Sensitivity in the Rule Settings ranges from 1 to 100, and the higher the value, the more easily the
defocus image will trigger the alarm.
9.15 Sudden Scene Change
Purpose
The scene change detection function detects the change of 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.