Noise suppression in digital voice communications systems

Details Noise suppression in digital voice communications systems Noise suppression in digital voice communications systems

1993-03-26

1996-07-02

Kuntz, Curtis

Electrical audio signal processing systems and devices

Noise or distortion suppression

Interpolation

381 46, H04B 1500

Patent

active

055331335

ABSTRACT:
Noise is suppressed during pauses and silent periods in conversation, and voiced signals are freely passed in a mobile communications system thereby improving the quality of the transmitted speech. Noise suppression is implemented in such a way that a low level of noise is still allowed to pass to provide presence of the remote speaker; that is, the line is not made completely silent as this may falsely indicate that the connection has been interrupted. The noise suppression has an added feature of decreasing the background noise fractionally when voice is no longer detected. This provides perceptually improved quality of the communication.

REFERENCES:
patent: 5133013 (1992-07-01), Munday
patent: 5220610 (1993-06-01), Kane et al.

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