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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Late reverberation PSD estimation for singlechannel dereverberation using relative convolutive transfer functions
 Institute of Electrical and Electronics Engineers IEEE: International Workshop on Acoustic Signal Enhancement, IWAENC 2016 : September 1316, 2016, Xi'an, China Piscataway, NJ: IEEE, 2016 ISBN: 9781509020072 ISBN: 9781509020089 pp.238242 
 International Workshop on Acoustic Signal Enhancement (IWAENC) <15, 2016, Xian> 

 English 
 Conference Paper 
 Fraunhofer IIS () 
 speech enhancement 
Abstract
The estimation accuracy of the late reverberation power spectral density (PSD) is of paramount importance in singlechannel frequencydomain dereverberation algorithms. In this domain, the reverberant signal can be modeled by the convolution of an early speech component and a relative convolutive transfer function (RCTF). In this work, the RCTF coefficients are modeled by a firstorder Markov chain, which is wellsuited to model timevarying scenarios. The RCTF coefficients are estimated online by a Kalman filter and are then used to compute the late reverberation PSD, which is used in a spectral enhancement filter to achieve dereverberation and noise reduction. It is shown that the proposed reverberation PSD estimator yields similar performance to other estimators, which impose a model on the reverberant tail and which depend on additional information like the reverberation time and the directtoreverberation ratio.