68
Figure 4-65 Audio
Step 2 Select the
Enable
check box in
Main Stream
or
Sub Stream
.
For the camera with multiple channels, select the channel number.
Step 3 Configure audio parameters. For details, see Table 4-21.
Table 4-21 Description of audio parameters
Parameter
Description
Encode Mode
You can select audio
Encode Mode
from
G.711A
,
G.711Mu
,
AAC
,
G.726
.
The configured audio encode mode applies to both audio and
intercom. The default value is recommended.
Sampling Frequency
Sampling number per second. The higher the sampling frequency
is, the more the sample in a second will be, and the more accuary
the restored signal will be. You can select audio
Sampling
Frequency
from
8K
,
16K
,
32K
,
48K
,
64K
.
Audioin Type
You can select audioin type from:
Linein
: Requires external audio device.
Mic
: Not require external audio device.
Noise Filter
Enable this function, and the system auto filters ambient noise.
Microphone Volume
Adjusts microphone volume.
Speaker Volume
Adjusts speaker volume.
Step 4 Click
Save
.