Voice activity detector for speech signals in variable backgroun

Details Voice activity detector for speech signals in variable backgroun Voice activity detector for speech signals in variable backgroun

1995-09-29

1997-07-15

MacDonald, Allen R.

395 217, 395 219, 395 222, 395 223, 395 224, 395 235, 395 262, 395 257, G10L 900

Patent

active

056490550

ABSTRACT:
A voice activity detector (VAD) which determines whether received voice signal samples contain speech by deriving parameters measuring short term time domain characteristics of the input signal, including the average signal level and the absolute value of any change in average signal level, and comparing the derived parameter values with corresponding thresholds, which are periodically monitored and updated to reflect changes in the level of background noise, thereby minimizing clipping and false alarms.

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