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- 2012-11-26
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Description: An Automatic Gain Controller (AGC) for speech signals embedded in additive noise requires Voice Activity
Detection (VAD) to avoid noise amplification, a peak level detector for computing gain, and a gain
controller for adjusting gain. This paper describes a low computational-intensive software AGC for use in
handheld devices. The AGC provides options for static and dynamic noise floor estimation in a VAD
module. Further, this paper describes analog and digital gain adjustment with gain curve selection to allow
for distance perception during the AGC operation.
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