English _
17
!
INST
ALLA
TION & CONNECTION
Connecting to Audio Input/Output
Speaker
Speaker
Microphone
PC
Microphone
Network
1.
Connect the MIC terminal of the camera to a microphone or LINE OUT port of the amplifier where a
microphone is connected.
2.
Connect the SPEAKER terminal of the camera to a speaker or LINE IN port of the amplifier where a
speaker is connected.
3.
Check the specifications for audio input.
~
Audio Codec
- Audio In : G.711 PCM (Bit Rate: 64kbps / Sampling Frequency: 8kHz), G.726 ADPCM (Bit Rate:
16Kbps, 24Kbps, 32Kbps, 40Kbps / Sampling Frequency: 8kHz), AAC (Bit Rate: 48Kbps / Sampling
Frequency: 16kHz)
- Audio Out : G.711 PCM (Bit Rate: 64kbps / Sampling Frequency: 8kHz)
~
Full duplex Audio
~
Audio in
: Selectable (microphone/Line-in), Supported voltage: 2.5VDC (4mA), Input impedance: 2K Ohm
~
Audio out
: Line-out (3.5mm mono jack), Maximum output: 1Vrms, Line out impedance : 600Ω
J
`
In the case you access the web viewer and select an external microphone as the audio input sources in <
Video & Audio
> -
<
Audio setup
>, the following specifications are recommended:
-
Frequency range: 40-16,000 Hz
-
Impedance: 1,500 Ω
-
Sensitivity: -40±3 dB (7.1-14.1 mV)
`
In the following cases, sound classification performance may deteriorate or malfunction.
-
The case of sound like a machine gun sound, not a single shot gunshot.
-
The case that the noise is too loud, so target sound source is not distinguishable.
-
The case that two or more different sound sources are input at the same time.
-
The case that sound classification is applied using noise canceling function in a quiet condition.
-
The case of applauding, screaming, etc., at a close distance from the camera (within 1 meter)
-
The case that a sound source such as an airplane sound or a siren sound, which is not in a sound classification category,
is suddenly loud.
-
The case that an external microphone does not meet the recommended specifications.
