逆ノッチフィルタを用いた音声強調による能動騒音制御

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2015/02/01

タイトル(英語): Active Noise Control with Speech Enhancement Using Inverse Notch Filter

著者名: 中谷　一輝（大阪大学 大学院基礎工学研究科），藤本　太平（大阪大学 大学院基礎工学研究科），川村　新（大阪大学 大学院基礎工学研究科），飯國　洋二（大阪大学 大学院基礎工学研究科）

著者名(英語): Kazuki Nakatani (Graduate School of Engineering Science, Osaka University), Taihei Fujimoto (Graduate School of Engineering Science, Osaka University), Arata Kawamura (Graduate School of Engineering Science, Osaka University), Youji Iiguni (Graduate School of Engineering Science, Osaka University)

キーワード: 能動騒音制御，Filtered-x LMS，音声強調，逆ノッチフィルタ，スペクトルゲイン　　Active Noise Control，Filtered-x LMS，Speech Enhancement，Inverse Notch Filter，Spectral Gain

要約(英語): This paper proposes an active noise control (ANC) system based on speech enhancement using inverse notch filter (INF). Conventional ANC systems remove an observed signal, even if it includes a desired speech signal. To extract the desired speech signal, we introduce a speech reduction method as pre-processing of the ANC system. In this case, the ANC produces only the noise replica, since the input signal to the ANC does not include the speech signal. We inversely use a speech enhancement technique to achieve speech reduction. One of the useful speech enhancement techniques is a spectral gain method. Inherently, the spectral gain method based on the FFT provides a delay depending on the analysis frame length. Since the ANC system can work well under a low processing delay, we replace the FFT with the INF which is a narrow band-pass filter for reducing processing delay. Simulation results show that the proposed ANC system with INF is effective to extract the speech signal included in the observed signal.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.135 No.2 （2015） 特集：フレキシブルフィルムデバイスのための材料・プロセスと評価技術

本誌掲載ページ: 244-253 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/135/2/135_244/_article/-char/ja/