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System for noise suppression, transceiver and method for noise suppression

  • US 7,035,796 B1
  • Filed: 05/06/2000
  • Issued: 04/25/2006
  • Est. Priority Date: 05/06/2000
  • Status: Expired due to Fees
First Claim
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1. A System for noise suppression of a speech signal that is intermingled with general noise, said system comprising:

  • a) an Input Unit for receiving(1) the speech signal intermingled with the general noise;

    (2) at least one audio signal from an audio source;

    said Input Unit comprising a Sound Processing Unit and a sensor for measuring a rotating rate of a device, in the course of which the Sound Processing Unit generates a second noise signal of the device using the rotating rate value measured by the sensor;

    b) a Processing Unit comprising(1) a first adaptive filter to produce a first noise signal from the audio signal;

    (2) a first calculation means to remove the first noise signal from the speech signal, thereby producing a first noise suppressed speech signal from the speech signal;

    (3) a second adaptive filter to produce a dynamically varying third noise signal from the second noise signal; and

    (4) a second calculation means to remove the third noise signal from the first noise suppressed speech signal, thereby producing a second noise suppressed speech signal which is a desired speech signal with the first noise signal and the third noise signal suppressed from the speech signal received by said Input Unit.

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