Robustness Techniques for Feature Extraction - Berlin Chen

Cepstral Mean Normalization (CMN)
• Some Findings
– Interesting, CMN has been found effective even the testing and
training utterances are within the same microphone and
environment
• Variations for the distance between the mouth and the microphone
for different utterances and speakers
– Be careful that the duration/period used to estimate the mean
of noisy speech
• Why?
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