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22
AXIS P1343/-E/AXIS P1344/-E - Video & Audio
Note:
Movements in front of the camera should be avoided during the automatic fine-tuning and the full range focus scan.
Audio Settings
This section describes how to configure the basic audio settings for the network camera. The audio functionality for all
streams is enabled under Video & Audio > Video Stream > Audio.
Audio Channels
Audio mode - The available audio modes are
• Full duplex. Simultaneous two-way audio allowing you to transmit and receive audio (talk and listen) at the same
time.
Note: There is no echo cancellation; if feedback loops appear, try moving the microphone or the speaker.
• Half duplex. Audio can be transmitted in both directions between the network camera and the client computer, but
only in one direction at a time. You must actively transmit/receive sound using the Talk/Listen button available on the
Live View page (see AXIS Media Control toolbar, on page 10). In Push-To-Talk mode, click and hold the button to speak
and release it when finished speaking. In Toggle mode, click once to switch between speaking and listening.
Note: The Talk/Listen button mode is configured from the Audio tab in the AMC control panel (see AXIS Media Con-
trol (AMC), on page 14).
• Simplex - Network Camera speaker only. Audio is transmitted from the client to AXIS P1343/-E/AXIS P1344/-E and
played by the speaker connected to the camera. To send audio, the Talk and Microphone buttons in the AMC toolbar
must both be enabled. Click either button to stop audio transmission.
• Simplex - Network Camera microphone only. Audio captured by the microphone connected to the network camera is
transmitted from the camera to one or more clients.
Audio Input
An external microphone or a line source can be connected to the Audio in the connector of the network camera. If an external
microphone or line source has been connected, the internal microphone will be automatically disconnected. The audio source
must be set to Microphone or Line depending on the connected device.
Notes:
• To prevent unauthorized listening, the internal microphone can be disabled by inserting a plug in the Audio in
connector.
• The internal microphone on AXIS P1343-E and AXIS P1344-E cannot be used.
The Enable microphone power option provides DC power for an external microphone. If using a small electret condenser
microphone such as a clip-on microphone or a PC microphone, enable this option.
Note:
To use a high impedance dynamic microphone, do not enable microphone power. 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.
If the sound input is too low or too high, adjust the input gain for the microphone attached to the network camera.
Select the desired audio Encoding format, G711 μ-law, G726 or AAC.
Select the required Sample rate (number of times per second the sound is sampled). The higher the sample rate, the better the
audio quality and the greater the bandwidth required.
Changing the Bit rate changes the audio compression level and hence audio quality. A higher bit rate can improve audio
quality but requires more bandwidth.
The net
work camera can be configured to trigger an event if the incoming sound level rises above, falls below, or passes the
set Alarm level.
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