Compact-structure input-weighted multitap digital filters

Details Compact-structure input-weighted multitap digital filters Compact-structure input-weighted multitap digital filters

1984-07-19

1987-09-15

Williams, Jr., Archie E.

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G06F 738

Patent

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046944133

ABSTRACT:
The number of bits per digital sample that is required to be stored in each of one or more delay means of an input-weighted multitap digital filter is reduced with respect to that required by the prior art. The savings in storage hardware becomes more and more significant as the number of samples stored in each delay means becomes larger and larger. A plurality of filter delay means, each storing as many as 800 samples, are used in vertical filters of image processors operating in real time on horizontally scanned two-dimensional images, such as television images.

REFERENCES:
patent: 4020332 (1977-04-01), Crochure et al.
patent: 4149259 (1979-04-01), Kowalski
patent: 4218752 (1980-08-01), Hewes et al.
Multirate Digital Signal Processing by C. Rochiere, et al., Prentice-Hall, Inc., 1983, pp. 79-88.
"The Laplacian Pyramid as a Compact Image Code," by Burt, et al., IEEE Transactions on Communications, vol. Com-31, No. 4, 4/83, pp. 532-540.

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