ID 5618
File
Authors
Nagata, Yudai
Asakura, Takenori
Keywords
speech processing
noise reduction
adaptive line enhancer
frequency domain
decorrelation parameter
modified DFT pair
window function
NDC
Technology. Engineering
Abstract
The speech noise reduction system based on the frequency domain adaptive line enhancer using a windowed modified DFT (MDFT) pair is presented. The adaptive line enhancer (ALE) is effective for extracting sinusoidal signals blurred by a broadband noise. In addition, it utilizes only one microphone. Therefore, it is suitable for the realization of speech noise reduction in portable electronic devices. In the ALE, an input signal is generated by delaying a desired signal using the decorrelation parameter, which makes the noise in the input signal decorrelated with that in the desired one. In the present paper, we propose to set decorrelation parameters in the frequency domain and adjust them to optimal values according to the relationship between speech and noise. Such frequency domain decorrelation parameters enable the reduction of the computational complexity of the proposed system. Also, we introduce the window function into MDFT for suppressing spectral leakage. The performance of the proposed noise reduction system is examined through computer simulations.
Publisher
電子情報通信学会 = Institute of Electronics, Information and Communications Engineers (IEICE)
Content Type
Journal Article
Link
ISSN・ISBN
0916-8508
NCID
AA10826239
Journal Title
IEICE transactions on fundamentals of electronics, communications and computer sciences
Current Journal Title
IEICE transactions on fundamentals of electronics, communications and computer sciences
Volume
E89-A
Issue
4
Start Page
950
End Page
959
Published Date
2006-04-01
Publisher-DOI
Text Version
Publisher
Rights
copyright©2006 IEICE
Citation
IEICE transactions on fundamentals of electronics, communications and computer sciences. 2006, E89-A(4), 950-959
Department
Faculty of Engineering/Graduate School of Engineering
Language
English