Method and apparatus for noise suppression within a distributed speech recognition system
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United States of America Patent
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Issued Date -
Jul 29, 2004
app pub date -
Jan 23, 2003
filing date -
Jan 23, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and apparatus for noise suppression within a distributed speech recognition system is provided herein. Mel-frequency cepstral coefficients (MFCCs) values are converted to filter bank outputs (F'.sub.0 through F'.sub.22). The filter bank outputs are then used by a noise suppressor (303) for channel energy estimation, noise energy estimation, etc. Noise-suppression takes place on F'.sub.0 through F'.sub.22 and the noise-suppressed filter bank outputs F'.sub.0 through F'.sub.22 are converted back to MFCC values.
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