Back to Search Start Over

Enhancement of Spanish Oesophageal Speech vowels using coherent subband modulator Kalman filtering.

Authors :
Ishaq, Rizwan
García Zapirain, Begoña
Zapirain, Begoña García
Source :
Technology & Health Care. 2016, Vol. 24 Issue 2, p201-213. 13p.
Publication Year :
2016

Abstract

This paper proposes an Oesophageal Speech (OES) enhancement method, based on Kalman filtering. The Kalman filter is applied to modulators of OES frequency subbands instead of the fullband signal. The OES frequency subbands are decomposed into modulators and carriers components using coherent demodulation. In comparison with fullband Kalman filtering and pole stabilization, the proposed technique shows better results. The system performance is evaluated objectively and subjectively using the Harmonic to Noise Ratio (HNR) and Mean Opinion Score (MOS) respectively. Results have shown that Kalman filter in subband modulators processing is robust and efficient, improving the HNR by 4 to 5 dB for all Spanish vowels. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09287329
Volume :
24
Issue :
2
Database :
Academic Search Index
Journal :
Technology & Health Care
Publication Type :
Academic Journal
Accession number :
114000298
Full Text :
https://doi.org/10.3233/THC-161129