User Manual

English _55
●● SETUP SCREEN
• Size
1. Select the <Common> tab.
2. For each rectangle that represents the minimum size and the maximum size, right-click on the vertex at
the bottom-right to move and resize it.
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Motions smaller than the specified minimum size or bigger than the maximum size are not detected. To avoid unintended
detections caused by great and small noises, set minimum/maximum motion sizes appropriately in accordance with your
environment. Note that the same motions on the same location can be detected differently in terms of their detection size; it is
recommended to consider and include the tolerable difference when setting the minimum/maximum detection sizes.
3. When done, click [Apply].
Audio detection
You can set to detect sound over the specified level and trigger an event accordingly.
1. From the Setup menu, select the <Analytics (
)> tab.
2. Click <Audio detection>.
3.
Set whether or not to < Enable Audio detection > .
4. Set the audio detection’s sound level.
The lower the level, the smaller the sound change is detected.
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The audio detection level is designed to normalize the input data to a
value between 1 and 100 and detect the signal larger than threshold
level. It is unrelated to the decibel (dB) level.
5. Configure the event motion schedule and event motion conditions.
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For more information about <Event activation time> and <Event action settings>, refer to “Alarm input”. (page 50)
6. When done, click [Apply].
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Select <Video & Audio> - <Audio setup> and set the proper volume for your MIC as an audio input source, so that the
audio detection function can work properly.
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If detected audio level is too low, set the audio input gain to a higher level in <Audio setup>.
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You can use the audio detection function when the camera is connected with an audio input device.
Sound classification
You can configure settings to generate an event signal in response to the detection of a specified sound
source.
1. From the Setup menu, select the <Analytics (
)> tab.
2. Click <Sound classification>.
3.
Set whether or not to < Enable Sound classification > .
4. Set the level of audio energy for the sound source to
classify. The energy level value for the input audio is updated
periodically from right to left, and is drawn on the area. Sound
source classification is only applied to audio at a level higher
than the specified value.
5. Configure settings for each item.
• Noise reduction : Specify the <Enable> status.
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If the noise in the surrounding environment is too loud, exceeding 55 to 60dB, use the noise reduction function.
If the noise reduction function is used, the sound classification function may be degraded or may malfunction depending on
the environment, as the original sound source is reduced. If you use the noise reduction filter in a quiet environment, the sound
source classification function may be impaired.
• Categories : Select a sound source to classify.
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Sound source definition
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Scream : Loud sound generated by humans, such as a scream or shout by a male/female adult or children
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Gunshot : Gunshot sound (excluding rapidly-generated, consecutive gunshot sounds)
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Explosion : Sound of sudden explosion that is the result of a destructive action
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Crashing glass : Sound of glass breakage
6. Configure the event motion schedule and event motion conditions.
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For more information about <Event activation time> and <Event action settings>, refer to “Alarm input”. (page 50)
7. When done, click [Apply].
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In <Video & Audio> - <Audio setup>, it is recommended to set the audio input gain to a value ranging from 4 to 6.
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In <Video & Audio> - <Audio setup>, if you set the audio input source to an external microphone, the recommended
microphone specifications are as follows.
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Frequency range: 40 to 16,000Hz
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Impedance: 1,500Ω
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Sensitivity: -40±3 dB (7.1~14.1 mV)
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In the following cases, sound source classification performance may be impaired or malfunction.
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Gunshot sounds are generated consecutively, such as the sound made by a machine gun rather than a one-shot sound.
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Noise is too loud to distinguish from the target sound source.
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2 or more sound sources are input simultaneously.
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Sound source classification is applied in a quiet environment using the noise removal function
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Sound of applause or scream is heard from a close distance (within 1m) from the camera
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A loud sound source that does not belong to any of the sound source categories such as aircraft sound or siren sound is
suddenly generated
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The external microphone does not conform to the recommended specifications