发明名称 |
System and Method for Performing Voice Activity Detection |
摘要 |
A Voice Activity Detection (VAD) algorithm provides a simple binary signal indicating the presence or absence of speech in a microphone signal. The VAD algorithm includes a first step of noise suppression which both estimates and removes (i.e., filters) ambient noise from the microphone signal to create a filtered signal. The magnitude of the filtered signal is then compared to a threshold in order to produce a VAD output signal. The threshold is dynamic and may be derived either from the filtered signal itself, or from a noise spectrum estimate calculated by the noise suppression step. |
申请公布号 |
US2013294614(A1) |
申请公布日期 |
2013.11.07 |
申请号 |
US201213461770 |
申请日期 |
2012.05.01 |
申请人 |
BHARITKAR SUNIL;DAHLIN NATHAN;AUDYSSEY LABORATORIES, INC. |
发明人 |
BHARITKAR SUNIL;DAHLIN NATHAN |
分类号 |
H04B3/20 |
主分类号 |
H04B3/20 |
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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