Suppression system of background noise of speech signals and the method thereof
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United States of America Patent
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Aug 30, 2005
Grant Date -
May 29, 2003
app pub date -
Oct 30, 2001
filing date -
Oct 30, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A suppression system of background noise of speech signals uses an adaptive filter of long-time and short-time statistical characteristics of the speech signals. Since the statistical characteristics of the speech signals vary with time, the associated coefficents of the filter also have to be adjusted according to the varitation of the speech signals to eliminate the unnecessary background noise. High frequency attenuation of the speech signals is compensated for by passing the signal through a high frequency booster to elevate the degree of brightness of the speech signals and to improve their quality.
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