METHOD AND APPARATUS FOR NOISE SUPPRESSION WITHIN A DISTRIBUTED SPEECH RECOGNITION SYSTEM

摘要

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'0 through F'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'0 through F'22 and the noise-suppressed filter bank outputs F''0 through F''22 are converted back to MFCC values.