Filter and method for whitening digitally generated noise

Details Filter and method for whitening digitally generated noise Filter and method for whitening digitally generated noise

1990-06-28

1991-07-16

Shaw, Dale M.

Boots, shoes, and leggings

G06F 1531

Patent

active

050330187

ABSTRACT:
A digital filter for prewhitening digital noise is realized without the need to perform multiplication or division operations to weight any of the digital samples. Instead, the data samples that need weighting are bit shifted to achieve multiplication or division by a power of two. In the preferred embodiment, the filtering function is 1-z/8, where z is a single sample delay. This function is implemented by bit shifting one sample three bits to the right and computing the difference between it and an adjacent sample.

REFERENCES:
patent: 4356558 (1982-10-01), Owen et al.
patent: 4573135 (1986-02-01), Dieterich
patent: 4703447 (1987-10-01), Lake, Jr.
patent: 4760542 (1988-07-01), Mehrgardt et al.
patent: 4811260 (1989-03-01), Abe et al.

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