Analog circuit implementation for speech enhancement purposes

Abstract

Human speech is the main method for personal communication. However, interfering noise could degrade the intelligibility of speech, eventually resulting in errors. Thus, efficient speech enhancement algorithms are needed for example in hand held battery powered hearing aids. This paper presents an implementation of a time domain method for speech enhancement purposes; the Adaptive Gain Equalizer. The implementation is carried out on a printed circuit board using common analog electronic components, and evaluated in real-time. The proposed solution benefits from high system bandwidth, it neither quantizes nor digitalizes data, and it is likely to have more efficient power consumption as opposed to many Digital Signal Processor (DSP) based solutions. The evaluation proves the speech enhancement performance of the analog circuit implementation.

Blind Beamforming Using Parallel Single-channel SPeech Enhancers

“…Further, its robustness and scalability and the fact that it does not require supplementary structures like Voice Activity Detectors (VAD) makes the AGE a suitable method for speech enhancement. The AGE has also been shown to fit in a variety of implementations [6,7]. The input-output signal assembly of the AGE is presented in Fig.…”

“…APESQx PESQx -PESQI. (15) 6 MEASUREMENT RESULTS The following measured results are obtained by using the evaluation setup presented in Section 4 and the performance measures differential SIR and differential PESQ presented in Section 5.…”

A Mixed Analog-Digital Hybrid for Speech Enhancement Purposes

“…The proposed solution is implemented on a Printed Circuit Board (PCB) and evaluated in real time. The AGE has been successfully implemented in MATLAB 1 [6] and on analog circuitry [7].…”