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3.6.3 Audio
The network camera can transmit audio to other clients using an external microphone and can play
audio received from other clients by attaching a speaker. The Setup page has an additional menu
item called Audio, which allows different audio configurations, such as full duplex and simplex.
• Audio Setting:
– Enable audio: Check the box to enable audio in the video stream.
– Compression type: G.711 µ-law
– Sample rate: 8KHz
– Sound bit rate: 64kps
• Audio Input: Audio from an external line source can be connected to the cable of the network
camera.
– Input volume: If there are problems with the sound input being too low or high, it is possible
to adjust the input gain for the microphone attached to the network camera.
– Mute: User can disable the input audio transmission by checking the box.
• Audio Output:
– Enable full duplex: Check the box to enable full duplex mode. This means that you can
transmit and receive audio (talk and listen) at the same time, without having to use any of
the controls. This is just like having a telephone conversation. This mode requires that the
client PC has a sound card with support for full duplex audio.
Uncheck the box enable Simplex mode. The simplex mode only transmits audio from the
network camera to any web client. It does not receive audio from other web clients.
– Output volume: If the sound from the speaker is too low or high it is possible to adjust the
output gain for the active speaker attached to the network camera.
– Mute: User can disable the output audio transmission by checking the box.
When the settings are complete, click Save button to save the settings, or click Reset button to
clear all of the information you entered without saving it.
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