Talker localization and speech enhancement in a noisy environment using a microphone array based acquisition system
Maurizio Omologo, Piergiorgio Svaizer · 1993
This paper deals with the use of linear microphone arrays for detection, localization and enhancement of a generic acoustic message produced in a noisy environment. A CrosspowerSpectrum Phase based analysis and a Coherence Measure representation are presented, that allow an accurate time delay estimation employed for the acoustic source position hypothesis. Preliminary results in terms of source localization accuracy are given. Once source position is estimated, an enhanced version of the original acoustic message is derived, that can represent the input for a speech recognition system. Keywords: Microphone Arrays, Talker Localization, Speech Enhancement. 1. INTRODUCTION Automatic speech recognizer performance often degrades drastically when employed in conditions that are different with respect to those for which they were designed. One reason for this is environmental noise. Another reason can be inconsistent use of the acoustic transducers during message acquisition. For example,...