Axis P1347, Руководство пользователя

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AXIS P1347 Network Camera
Video and Audio
For more information about these settings, please see the online help .
Audio Input
An external microphone or a line source can be connected to the product’s Audio-in connector. Con fi gure the audio input settings
under Video & Audio > Audio Settings .
Source - Select Microphone for an external microphone or Line for a Line in device, e.g. an audio mixer for multiple microphones or
a microphone with a built-in ampli fi er.
Microphone power -
The Enable microphone power option provides DC power for an external microphone. Microphone power should
only be used with microphones that have no battery and when using the internal microphone. This setting should not be enabled
when using a dynamic or battery powered microphone. Microphone power will not harm the microphone; if you are uncertain, try
switching it off and on. To use a professional microphone requiring 48V phantom power, you need an external power supply and a
balanced-unbalanced converter (audio transformer) in between.
Input gain - Control the volume (dB Full Scale) of the audio input. If the sound is too low, choose a higher dB, to amplify the
sound. If the sound is too high, choose a lower dB. 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.
Encoding -
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
•
G726
Sample rate -
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.
Bit rate - 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 .
Audio Output
An external speaker can be connected to the product’s Audio-out connector. The output can be used with high impedance
headphones or connected to another ampli fi er with speakers.
Con fi gure the audio output settings under
Video & Audio
>
Audio Settings
.
Output gain - Control the volume (dB Full Scale) of the line audio output. If the sound is too low, choose a higher dB. If the
sound is too high, choose a lower dB.
Audio Clips
An audio clip is a sound fi le that can be played either when an event occurs or manually from the
Live View
page. Audio clips can
be uploaded to the product or recorded by a microphone connected to the product.
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