Doc # APN-24M8.29IP
Issue Date: 03/23/2020
Revision: C
Page 33 of 71
G. 1, 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.
Input volume: The Input volume can be adjusted in the range from -12.00 to 12.00 dB. The default
setting is 0 dB. Click the Mute box if you do not want the audio input.
Output volume: The Output volume can be adjusted in the range from 9 to -24 dB. The default setting is
0 dB. Click the Mute box if you do not want the audio output.
20.
Record
When the network camera detects an event, it can record the video stream in the SD Memory (not
supplied). Check the box to enable the service.
Continuous Recording Setting:
Click the checkbox for continuous recording and then select which
stream record.
CONFIDENTIAL
