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71
event in the period.
Step 6 Click
Apply
.
4.6.3.2 Configuring Video Tampering
The system performs alarm linkage when the lens is covered or video output is mono-color screen
caused by light and other reasons.
Step 1 Select >
Event
>
Video Detection
>
Video Tampering
.
Step 2 Click to enable the video tempering function.
Figure 4-59 Video tampering
Step 3 Set arming periods and alarm linkage action. For details, see "4.6.1.2 Alarm Linkage".
If the exiting schedules cannot meet the scene requirement, you can click
Add Schedule
to add a new schedule. For details, see "4.6.1.2.1 Adding schedule".
Step 4 Click
Apply
.
4.6.4 Configuring Audio Detection
The system performs alarm linkage when vague voice, tone change, or rapid change of sound
intensity is detected.
Step 1 Select >
Event
>
Video Detection
>
Audio Detection
.
Step 2 Set parameters.
●
Input abnormal: Click next to
Audio Abnormal
, and the alarm is triggered when
the system detects abnormal sound input.
●
Intensity change: Click next to
Intensity Change
, and then set
Sensitivity
and
Threshold
. The alarm is triggered when the system detects that the sound intensity
exceeds the configured threshold.
◇
It is easier to trigger the alarm with higher sensitivity or smaller threshold. Set a high
threshold for noisy environment.
◇
The red line in the waveform indicates audio detection is triggered, and the green
one indicates no audio detection. Adjust sensitivity and threshold according to the
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