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MAP estimation-based noise suppression and blind source separation using single voice activity detection

Research Project

Project/Area Number 24500204
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Perception information processing/Intelligent robotics
Research InstitutionOsaka University

Principal Investigator

KAWAMURA Arata  大阪大学, 基礎工学研究科, 准教授 (60362646)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords単一話者区間 / 音源分離 / ノイズ除去 / 事後確率最大化 / 統計処理 / MAP推定 / 音源分離性能の改善 / 直交軸射影 / ICA
Outline of Final Research Achievements

A blind source separation method using two microphones has been investigated. In a practical situation, environmental noise and reverberation exist. Since they degrade source separation quality, we have to remove such undesired effects. To establish an effective blind source separation method, we employ a single voice activity detector which detects single talk segments. These segments give the target source locations. Addition to it, a MAP (maximum a posteriori) estimation-based noise suppressor is introduced as a post-processor for improving the speech quality of the separated signals. Test speech signals are transmitted from loudspeakers and captured at a stereo microphone in a practical reverberant environment. Simulation results showed that the observed speech signals are effectively separated by the proposed method.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (2 results)

All 2015 2012

All Presentation (2 results)

  • [Presentation] 単一話者区間に基づいた残響下での2チャンネル音源分離2015

    • Author(s)
      松田篤史,川村新,飯國洋二
    • Organizer
      電子情報通信学会技術研究報告
    • Place of Presentation
      沖縄県:ホテルミヤヒラ
    • Year and Date
      2015-03-02 – 2015-03-03
    • Related Report
      2014 Annual Research Report
  • [Presentation] 2チャンネル音源分離のための単一話者区間検出法の検討2012

    • Author(s)
      足苅昇平,川村新,飯國洋二
    • Organizer
      電子情報通信学会技術報告会
    • Place of Presentation
      大阪大学中之島センター
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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