D-Link DCS-3715, Руководство пользователя, Страница: 35 / 78

35 D-Link DCS-3715 User Manual
Configuration
Audio Settings
Mute: Select to mute audio.
Note:
• If the switch on the rear panel is switched off (disabled audio) then this
option will be disabled.
Select and set an internal microphone input gain from the drop-down list.
Internal microphone input gain: It is necessary to find the optimum gain that
transmits the best audio for listening.
External microphone input:
Set the microphone input gain at either 0dB or
20dB.
Note:
The higher the decibel number, the louder the sound.
Audio type: Advanced Audio Coding (AAC) is a wide band audio coding
algorithm that exploits two primary coding strategies to dramatically reduce
the amount of data needed to convey high-quality digital audio. Select a
higher bit rate number for better audio quality.
AAC bit rate:
Select an AAC bit rate from the drop-down list. Higher bit rate
means higher audio quality but it takes more network bandwidth to transmit.
GSM-AMR:
A standard adapted audio codec by the 3GPP video (3rd
Generation Partnership Project). It is an Adaptive Multi Rate-Narrow Band
(AMRNB) speech codec. Select a higher bit rate number for better audio
quality.
GSM-AMR bit rate: Select the GSM-AMR bit rate from the drop-down
list. Higher bit rate means higher audio quality but it takes more network
bandwidth to transmit.