Speech Noise Reduction System Based on Frequency Domain ALE Using Windowed Modified DFT Pair(<Special Section>Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)

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概要

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• 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.

• 社団法人電子情報通信学会の論文
• 2006-04-01

著者

• Nakanishi I

  Tottori Univ. Tottori‐shi Jpn

• ITOH Yoshio

  Faculty of Engineering, Tottori University

• FUKUI Yutaka

  Faculty of Engineering, Tottori University

• Itoh Y

  Faculty Of Engineering Tottori University

• Itoh Yoshio

  Faculty Of Engineering Tottori University

• Itoh Yoshio

  Fac. Of Engineering Tottori Univ.

• Fukui Y

  Faculty Of Engineering Tottori University

• Fukui Y

  Graduate School Of Engineering Tottori University

• NAKANISHI Isao

  Faculty of Regional Sciences, Tottori University

• NAGATA Yuudai

  Faculty of Engineering, Tottori University

• ASAKURA Takenori

  Faculty of Engineering, Tottori University

• Asakura Takenori

  Faculty Of Engineering Tottori University

• Itoh Y

  Tottori Univ. Tottori‐shi Jpn

• Fukui Yutaka

  Faculty Of Engineering Setsunan University

• Nagata Yuudai

  Faculty Of Engineering Tottori University

• Nakanishi Isao

  Faculty Of Education Tottori University

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