System and apparatus for speech communication and speech recognition
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United States of America Patent
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-
Mar 18, 2008
Grant Date -
Sep 30, 2004
app pub date -
Jul 2, 2002
filing date -
Sep 12, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A headset system is proposed including a headset unit to be worn by a user and having two or more microphones, and a base unit in wireless communication with the headset. Signals received from the microphones are processed using a first adaptive filter to enhance a target signal, and then divided and supplied to a second adaptive filter arranged to reduce interference signals and a third filter arranged to reduce noise. The outputs of the second and third filters are combined, and are be subject to further a processing in the frequency domain. The results are transmitted to a speech recognition engine.
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