Noise canceler utilizing orthogonal transform

Details Noise canceler utilizing orthogonal transform Noise canceler utilizing orthogonal transform

1997-08-27

1999-09-14

Vo, Don N.

Pulse or digital communications

Receivers

Interference or noise reduction

H04B 110

Patent

active

059533811

ABSTRACT:
A noise canceler according to the invention orthogonally transforms a noise frame by means of an FFT and sorts its transform coefficients into N groups by means of a group by group basic reduction value determining section. Then, it compares the mean value of the transform coefficients of each of the groups with a threshold value and determines a basic reduction value according to the outcome of the comparison. Then, it operates to suppress the transform coefficients produced from the FFT by means of a transform coefficient suppressing section on the basis of the basic reduction value.

REFERENCES:
patent: 5577161 (1996-11-01), Pelaez Ferrigno
patent: 5752226 (1998-05-01), Chan et al.

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