| 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)
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| 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.
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