Real-time sound source localization based on multi-resolution scanning in frequency domain

Abstract

Robust speech recognition is necessary for realizing useful speech interfaces. A microphone array is an effective item at capturing distant-talking speech with high-quality in noisy environments. It captures the target speech by localizing a talker and steering the directivity. These processing is usually executed in each frequency. For realizing useful speech interface, these processing must be finished in real-time. In the research into sound source localization, various methods have already been developed, and these methods localize a sound source based on acoustic space scanning by fixed resolution in each frequency. Therefore, calculation time is increased, and the real-time processing is difficult in higher spatial resolution. To overcome this problem, we proposed the localization method based on multi-resolution scanning in frequency domain. The lower frequency band has lower spatial resolution, and the higher frequency band has higher spatial resolution. The proposed method localizes the sound sou...