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AXIS Q7424–R0N,,
Video and Audio
Half-duplex - Audio can b e transmitted in both directions between the Axis product and the client computer, b ut only in one
direction at a time. You must actively receive sound using the Talk/Listen button visible in the Live View page (see
AXIS Media
Control viewer toolbar
). In Push-To-Talk m ode , click and hold the button to speak and release it when done. In Toggle mode, click
once to switch between speaking and listening. The Talk/Listen mode is configured from the Audio tab in the AM C c ontro l panel
(see A XIS Media Contro l on
page 12
).
Simplex - Network Camera speaker only - Audio is transmitted f rom the client to the Axis p roduct and played by the speaker
connected to the product. To send audio, the Talk and Microphone buttons in the AMC toolbar m ust both be enabled. Click either
button to stop audio transmissio n.
Simplex - Network Camera microphone only - A udio captured by the microphone connected to the Axis product is transmitted from
theproducttooneormoreclients.
For more information ab ou t these settings, please see the on lin e help
.
Audio Input
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 Enab le microphone power o ption provides DC power f or an external microphone. 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. Microphone pow er 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 transforme r) in between.
Input gain - Control the volume (dB Full Scale) of the aud io 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 visua l 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, A AC is the recomm ended codec to use. An AAC license
is included in the Axis product.
• G711
• G726
Sample rate - The number of tim es per second the sound is sampled. A higher sample r ate will provide b ette r a udio quality, but
also requires a greater b andw idth.
Bit rate - Set the required bit rate depending on the selected encoding. A highe r bit rate will give better audio quality. A lowe r bit
rate m ay hav
e latency or delay, but w ill require less bandwidth.
For more
information about these settings, please see the online help
.
Audio Output
Configure the audio output settings under Video & A udio > Audio Settings.
20
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