发明名称 |
MULTIPLE MICROPHONE VOICE ACTIVITY DETECTOR |
摘要 |
Voice activity detection using multiple microphones can be based on a relationship between an energy at each of a speech reference microphone and a noise reference microphone. The energy output from each of the speech reference microphone and the noise reference microphone can be determined. A speech to noise energy ratio can be determined and compared to a predetermined voice activity threshold. In another embodiment, the absolute value of the autocorrelation of the speech and noise reference signals are determined and a ratio based on autocorrelation values is determined. Ratios that exceed the predetermined threshold can indicate the presence of a voice signal. The speech and noise energies or autocorrelations can be determined using a weighted average or over a discrete frame size.
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申请公布号 |
CA2695231(A1) |
申请公布日期 |
2009.04.02 |
申请号 |
CA20082695231 |
申请日期 |
2008.09.26 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
WANG, SONG;GUPTA, SAMIR KUMAR;CHOY, EDDIE, L. T. |
分类号 |
G10L11/02 |
主分类号 |
G10L11/02 |
代理机构 |
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