Third European Conference on Speech Communication and Technology

Berlin, Germany
September 22-25, 1993


A Speech Enhancement System Using Higher Order Ar Estimation In Real Environments

Josep M. Salavedra (1), Enrique Masgrau (2), Asunción Moreno (1), Xavier Jove (1)

(1) Department of Signal Theory and Communications, Universitat Politecnica de Catalunya, Barcelona. Spain
(2) Department of Electrical Engineering and Computers, Universidad de Zaragoza, Zaragoza. Spain

We study some speech enhancement algorithms based on the iterative Wiener filtering method due to Lim-Oppenheim [2], where the AR spectral estimation of the speech is carried out using a second-order analysis. But in our algorithms we consider an AR estimation by means of cumulant analysis. This work extends some preceding papers due to the authors, providing a behavior comparison between cumulant algorithms and classical auto-correlation one. Some results are presented considering AWGN that allows the best improvement and those noises (diesel engine and reactor noises) that leads to the worst one. An exhaustive empirical test shows that cumulant algorithms outperform the original autocorrelation algorithm, specially at low SNR.

Full Paper

Bibliographic reference.  Salavedra, Josep M. / Masgrau, Enrique / Moreno, Asunción / Jove, Xavier (1993): "A speech enhancement system using higher order ar estimation in real environments", In EUROSPEECH'93, 223-226.