Noise filtering device

Details Noise filtering device Noise filtering device

1976-12-20

1977-10-04

Claffy, Kathleen H.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 70T, H04B 112

Patent

active

040525597

ABSTRACT:
Noise such as hum (whose components are self-correlated over a long time-interval) is estimated (separated) from Signal such as speech (whose components are self-correlated only over a short time-interval) by using a time-domain transversal filter, whose tap-weight coefficients may be fixed (Wiener filter) or variable (Adaptive filter). A combiner combines the estimated noise and original input signal to develop an output speech signal free of noise. The output speech may by further applied to a spectrum shaper to restore a natural shape.

REFERENCES:
patent: 3617948 (1971-11-01), Lucky
patent: 3659229 (1972-04-01), Milton
patent: 4000369 (1976-12-01), Paul

Affiliated with

Also associated with

Rating

Noise filtering device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Noise filtering device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Noise filtering device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1775926