Automatic gain control with integrated signal enhancement for specified target and background-noise levels
Akihiko K. Sugiyama, Ryoji Miyahara · 2017
This paper proposes automatic gain control with integrated signal enhancement for specified target and background-noise levels. The input signal is separated into a target signal and background noise by signal enhancement. The processing gains for the target and the noise are calculated from their estimated magnitudes and desirable output levels. After independent amplification/attenuation of the target signal and the noise, they are summed up to construct the output signal with their specified levels. Because of independent gain control, a more suitable signal for user needs can be obtained. Evaluation results demonstrate that the proposed gain control provides as much as 6 dB better gain than a commercial voice recorder with comparable signal quality.