Motorola g20 - Figure 3. Sidetone; Figure 4. Echo Cancel

98-08901C68-O 7
Product Features
2.1.3.2 Features and Benefits
The following algorithm related features are provided:
2.1.3.2.1 Sidetone
Sidetone reduces the microphone audio input that is routed to the selected speaker so that the person speaking can hear himself
or herself talking. This creates a slight echo because the speaker sound then gets picked up again by the microphone and is again
routed to the speaker, and so on. Echo suppress is designed to take care of this echo.
Figure 3. Sidetone
2.1.3.2.2 Echo Cancel
Echo cancel suppresses a large amount of the output sound picked up by the input device (cancels all echoes).
Figure 4. Echo Cancel
2.1.3.2.3 Noise Suppress
Noise suppression improves audio quality in all modes by suppressing environment noise from being picked up by the input
device.
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Echo
C ancel
g20
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Out line is filter
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Problem
Loop
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Solution
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