System and method for reducing noise

Details System and method for reducing noise System and method for reducing noise

1992-04-06

1994-03-22

Isen, Forester W.

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

381110, H04B 1500

Patent

active

052972135

ABSTRACT:
A noise reduction system for removing unwanted audio noise during a pause. The system receives an intelligence plus noise signal that is split and fed to a first rectifier having a first polarity, and through a filter to a second rectifier having a polarity opposite to the first rectifier. The filter removes components below a frequency where most energy-frequency is distributed in human speech. The output of the rectifiers is summed to produce an output signal when most audio noise between pauses in voice is reduced.

REFERENCES:
patent: 4461025 (1984-07-01), Franklin
patent: 4703507 (1987-10-01), Holden
patent: 4809337 (1989-02-01), Scholz et al.
patent: 5036540 (1991-07-01), Eastmond

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