Apparatus for improving disturbed speech signals

Details Apparatus for improving disturbed speech signals Apparatus for improving disturbed speech signals

1996-07-01

1997-12-16

MacDonald, Allen R.

395 235, G10L 302

Patent

active

056994800

ABSTRACT:
An apparatus for the transmission of speech signals reduces the effect of disturbances on the transmission quality. Two microphones are provided for picking up speech signals. Signal processing ensues in three partial frequency bands. The microphone signals are high-pass filtered in a lower frequency band, in the middle frequency band the signal is weighted with a scalar factor, so that this frequency band is damped during the speech pauses, and in the upper frequency band, an adaptive filter is used. At the beginning of the processing, a treble enhancement of the signals ensues, which is canceled by an inverse filter before the output of the improved signal.

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