Speech detection device
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United States of America Patent
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Oct 20, 1998
Grant Date -
N/A
app pub date -
Mar 18, 1996
filing date -
Jul 18, 1994
priority date (Note) -
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Abstract
The device detects the beginning and ending portions of speech contained within an input signal based on the variance of smoothed frequency band limited energy and the history of the smoothed frequency band limited energy within the signal. The use of the variance allows detection which is relatively independent of an absolute signal-to-noise ratio with the signal, and allows accurate detection within a wide variety of backgrounds such as music, motor noise, and background noise, such as other voices. The device can be easily implemented using off-the-shelf hardware along with a high-speed special purpose digital signal processor integrated circuit.
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