AXIS F41 Main Unit
Video and Audio
•
Simplex – Network Camera microphone only -
Audio captured by the product microphone is transmitted from the
Axis product to one or more clients.
To set the audio mode, go to
Video & Audio > Audio Settings
and select the desired mode from the
Audio mode
drop-down list.
Audio Input
An external microphone or a line source can be connected to the Audio-in connector. Configure the audio input settings under
Video
& Audio
>
Audio Settings
.
Note
If using unbalanced Line in a mono contact must be used. Signal on tip and ground on sleeve.
Note
If using balanced Line in a stereo contact must be used. Hot on tip, cold on ring and ground on sleeve.
Select
Microphone
to use an external microphone or
Line
to use a Line in device, e.g. an audio mixer for multiple microphones
or a microphone with a built-in amplifier, as audio source.
Select the
Yes
option if the Line input or external microphone is
Balanced
.
The
Microphone power
option provides DC power for an external microphone.
The
Microphone power
option is available for external microphones. 5V DC power or 12 V phantom power are available depending
on if the microphone is unbalanced or balanced. Microphone power should only be used with microphones that have no battery. This
setting should not be enabled when using a dynamic or battery powered microphone.
To use a professional microphone requiring 48V phantom power, you need an external power supply and a balanced-unbalanced
converter (audio transformer) in between.
Use the
Input gain
to control the volume of the audio input. If the sound is too low, choose a higher dB value, to amplify the
sound. If the sound is too high, choose a lower dB value. The
Level
bar gives a visual representation of the audio signal level in dB
relative to the full-scale input level.
•
Green — the signal is at a good level.
•
Yellow — the signal is becoming distorted.
•
Red — the signal is distorted.
Use the
Encoding
option to select digital audio encoding format.
•
AAC
requires a license for both encoding and decoding. AAC is the least complicated and most widely used codec. If
achieving the best possible audio quality is a priority, AAC is the recommended codec to use. An AAC license is included
in the Axis product.
•
G711
is an unlicensed standard codec that is useful when integrating audio into a VoIP system
•
G726
is an unlicensed speech codec that is most commonly used within the security industry.
Note
The
Sample rate
defines the number of times per second the sound is sampled. A higher sample rate will provide better audio
quality, but also requires a greater bandwidth.
Set the required
Bit rate
depending on the selected encoding. A higher bit rate will give better audio quality. A lower bit rate
may have latency or delay, but will require less bandwidth.
For more information about these settings, please see the online help
.
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