Estimation of Noise Parameter and Detection of Speech Activity

ISBN-13: 9783846518236 / Angielski / Miękka / 88 str.

Mahmudul Hasan Raju

Opis

The most critical and difficult problem in speech analysis is reliable discrimination among Silence, Unvoiced and Voiced speech. Several methods have been proposed for making this three levels decision and most of them need Speech Activity Detection (SAD). In this study, we propose the Estimated Degree of Noise (EDON) to adjust the threshold of speech activity. To estimate the degree of noise, a function was previously prepared using the least-squares (LS) method, from the given (true) DON and the estimated parameter of DON. This parameter is obtained from the Auto-Correlation Function (ACF) of the noisy speech on a frame basis. Issues associated with this EDON for SAD approach are discussed, and experiments are done using the TIMIT database. Experimental result shows that using EDON improves the classification performance specially voiced and silent parts and the efficiency is compared with other existing published algorithms.

O autorze

Mahmudul Hasan Raju, who obtained an M.Sc.(Thesis) in Computer Science and Engineering from University of Rajshahi, Bangladesh in 2010, is currently employed as a Post Lecturer in the Department of Computer Science and Engineering at Comilla University, Bangladesh. He is a member of IAENG and reviewer of IJCSIS journal.