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Check the Enable box to enable audio. Configure the basic audio settings for the
camera. It supports the audio full duplex that can be transmits and receives audio
in both directions at a time.
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Compression:
G.711 is the international standard for encoding wired-telephone audio on 64kBit/s
channel. It is a PCM (Pulse Code Modulation) scheme operating at 8 kHz sample
rate. The default setting is G.711 µ-law.
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Sample rate: Indicates the number of times per second the sound is sampled.
The default setting is 8 kHz.
[ NOTE ]
G.711, also known as Pulse Code Modulation (PCM), is a very commonly used
waveform codec. G.711 uses a sampling rate of 8,000 samples per second, with
the tolerance on that rate 50 parts per million (ppm).
Non-uniform quantization (logarithmic) with 8 bits is used to represent each sample,
resulting in a 64 kbit/s bit rate. There are two slightly different versions; μ-law, which
is used primarily in North America, and A-law, which is in use in most other countries
outside North America.
G.711 μ-law tends to give more resolution to higher range signals while G.711 A-law
provides more quantization levels at lower signal levels.
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Input volume:
The Input volume can be adjusted in the range from -12.00 to 12.00 dB. to the
speaker. Click the Mute box if you do not want the audio input.
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Output volume:
The output volume can be adjusted in the range from -12.00 to 12.00 dB. to the
speaker. Click the Mute box if you do not want the audio output.
3-3. Audio
Full Menu Setup
