Method for detecting speech activity
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United States of America Patent
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Dec 2, 2003
Grant Date -
N/A
app pub date -
Jun 2, 2000
filing date -
Sep 18, 1997
priority date (Note) -
In Force
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Abstract
A digital speech signal processed by successive frames is subjected to noise suppression taking account of estimates of the noise included in the signal, updated for each frame in a manner dependent on at least one degree of vocal activity. A priori noise suppression is applied to the speech signal of each frame on the basis of estimates of the noise obtained on processing at least one preceding frame, and the energy variations of the a priori noise-suppressed signal are analyzed to detect the degree of vocal activity of said frame.
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