ISBN 9783843933841

978-3-8439-3384-1, Reihe Ingenieurwissenschaften

Ante Jukić
Sparse Multi-Channel Linear Prediction for Blind Speech Dereverberation

204 Seiten, Dissertation Carl von Ossietzky Universität Oldenburg (2017), Hardcover, B5

Zusammenfassung / Abstract

In many speech communication applications, such as hands-free telephony and hearing aids, the microphones are located at a distance from the speaker. Therefore, in addition to the desired speech signal, the microphone signals typically contain undesired reverberation and noise, caused by acoustic reflections and undesired sound sources. Since these disturbances tend to degrade the quality of speech communication, decrease speech intelligibility and negatively affect speech recognition, efficient dereverberation and denoising methods are required.

This thesis deals with blind dereverberation methods, not requiring any knowledge about the room impulse responses between the speaker and the microphones. More specifically, we propose a general framework for blind speech dereverberation based on multi-channel linear prediction (MCLP) and exploiting sparsity of the speech signal in the time-frequency domain.