发明名称 |
Speech recognition using microphone antenna array |
摘要 |
A system and method of audio processing provides enhanced speech recognition. Audio input is received at a plurality of microphones. The multi-channel audio signal from the microphones may be processed by a beamforming network to generate a single-channel enhanced audio signal, on which voice activity is detected. Audio signals from the microphones are additionally processed by an adaptable noise cancellation filter having variable filter coefficients to generate a noise-suppressed audio signal. The variable filter coefficients are updated during periods of voice inactivity. A speech recognition engine may apply a speech recognition algorithm to the noise-suppressed audio signal and generate an appropriate output. The operation of the speech recognition engine and the adaptable noise cancellation filter may advantageously be controlled based on voice activity detected in the single-channel enhanced audio signal from the beamforming network.
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申请公布号 |
US2003069727(A1) |
申请公布日期 |
2003.04.10 |
申请号 |
US20010970369 |
申请日期 |
2001.10.02 |
申请人 |
KRASNY LEONID;KHAYRALLAH ALI;MAKOVICKA THOMAS |
发明人 |
KRASNY LEONID;KHAYRALLAH ALI;MAKOVICKA THOMAS |
分类号 |
G10L15/20;G10L21/02;(IPC1-7):G10L21/02;G10L21/00 |
主分类号 |
G10L15/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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